Mo Bond Research Articles

Structural, spectral, optical, thermal and Z-Scan potential studies of copper sodium tartrate single crystal for higher order nonlinear optical applications

A new copper (II) sodium (I) tartrate trihydrate with general formula of [(Na2 Cu2 (C4H4O6) 3 (H2O) 3) 3H2O] (NaCuT) was synthesized and grown from the silica gel. The monoclinic structure and the space group P21 of the as-grown crystal are calculated and non identical with copper tartrate is found by the single crystal and powder X-ray diffraction studies. The presence of OH, CO, CO, CH and MO bonds were confirmed by Raman FTIR spectroscopy. The UV spectrum showed the transmittance in the Ultra-Violet region about the lower cutoff wavelength at 310.5 nm which makes the material to be suitable for UV filters. Different decomposition stages with respect to the mass loss of the copper sodium tartrate were studied by thermo gravimetric analysis. Occurrence of the improved electrical conductivity by the pi electrons of the CO and O-H----O groups of the CuNaT crystal was established by the dielectric studies. From Z-scan studies, the present sample proved its suitability for non linear optical applications.

Computational study of the [(CO)2(benzoate)MII/III(terephthalate)]0/1+ complexes with M = V, Cr, Mn, Fe and Co

Computational study at DFT-B3LYP/LANL2DZ level of theory is carried out to evaluate structural, bonding and energetic characteristics of cis/trans isomers of the [(CO)2(benzoate)MII/III(terephthalate)]0/1+ complexes with 3d transition metals M = V, Cr, Mn, Fe and Co. Results of this study show that all cis/trans isomers of these complexes in their two oxidation states are stable with distinctly different structures. As a general trend, for all cis/trans isomers of these complexes, the MO(benzoate) and MO(terephthalate) bonds are shorter for the MIII oxidation state of the metal ion compared to those for the corresponding MII oxidation state. Also, structure of the set of four MO bonds are almost asymmetric such that the optimized MII/IIIO (terephthalate) bond lengths are slightly longer than the MII/IIIO(benzoate) bond lengths. The coordination MO bonds structure of the cis/trans isomers of the [(CO)2(benzoate)CoII(terephthalate)] complex have the most asymmetries, and interestingly, its trans isomer is more asymmetric than its cis isomer. The MIII complexes have larger electric dipole moments compared to their corresponding MII complexes. Furthermore, cis/trans isomerization has no significant effect on the size of electric dipole moment for the MII complexes.

Soft hydrogen plasma induced phase transition in monolayer and few-layer MoTe2

Phase transition from the semiconducting hexagonal (2H) phase to the metallic monoclinic (1T′) phase in two-dimensional (2D) transition metal dichalcogenides like MoTe2 is not only of great importance in fundamental study but also of technological significance for broad device applications. Here we report a universal, facile, scalable and reversible phase engineering technique (between 2H and 1T′ phases) for both monolayer and few-layer MoTe2 based on a soft hydrogen plasma treatment. The 2H → 1T′ transition was confirmed by a series of characterizations including Raman spectra and mapping studies, XPS analysis and FET device measurements at varying temperatures. We attribute the phase transition to the warping of Te–Mo bonds and the lateral sliding of the top Te-layer induced by the soft hydrogen ion bombardment according to both the structural and electronic characterizations as well as the horizontal comparison with the cases of Ar or O2 plasma treatment. We have also prepared a 2D heterostructure containing periodical 2H and 1T′ MoTe2 and showed that such phase transition can be readily reversed by post annealing. These results thus provide a robust and efficient approach for the phase engineering of monolayer and few-layer MoTe2 and could aid the development of 2D optoelectronic, memory and reconfigurable devices.

Weak acids with super-electron-donor dimetal complexes: Synergy in bifunctional activity

Dimetal paddlewheel complexes with bicyclic guanidine ligands are extremely strong thermodynamic electron donors. As a probe of the chemical potential and sites for chemical reactivity of these complexes, the interaction of Mo2(TEhpp)4 with weak acids was investigated (TEhpp is the anion of the bicyclic guanidine 3,3,9,9-tetraethyl-1,5,7-triazabicyclo[4.4.0.]dec-4-ene). Mo2(TEhpp)4 is readily protonated by acetic acid and trifluoroacetic acid as expected, but surprisingly by a mechanism that is more complicated than a simple acid-base proton exchange. Electrochemistry measurements of the shifts in potentials with successive additions of acid reveals that the conjugate base of the acid plays a critical role throughout the reaction. Computations indicate that initially the acid hydrogen bonds to a TEhpp nitrogen atom bound to the metal, and then a facile rearrangement of the conjugate base toward the axial site of the Mo–Mo bond concomitantly results in protonation of the nitrogen atom. Interestingly, the dimetal complex is bifunctional in this process, acting as a nucleophile at the nitrogen atoms of the TEhpp ligands, and as an electrophile at the Mo–Mo axial bond sites. The protonation requires a novel synergism of these disparate bonding interactions, in which protonation is not favored without enhancement by the coordinated base, and coordination of the base is enhanced by the protonation.

Heterostructure CoS/NC@MoS2Hollow Spheres for High‐Performance Hydrogen Evolution Reactions and Lithium‐ION Batteries

AbstractUniquely structured CoS/N‐doped carbon@MoS2(denoted as CoS/NC@MoS2) hollow spheres were successfully synthesized by using a well‐designed N‐rich Co‐metal organic framework (ZIF‐67) precursor and template. Owing to the good mechanical stability and conductivity of carbon hollow spheres, N‐doped carbon, and Co−Mo bonds, the as‐prepared CoS/NC@MoS2composites exhibit outstanding electrochemical performance both in electrocatalytic and energy storage applications. An overpotential of 77 mV at 10 mA cm−2, and a Tafel slope of 67 mV dec−1could be obtained in acid environment for the hydrogen evolution reaction. As an anode material for lithium‐ion batteries, the as‐prepared composites exhibit good cycling stability with a high reversible specific capacity of 802.4 mA h g−1at a current density of 1 A g−1after 400 cycles and good rate capability.

Structural, thermal and magnetic investigations of cobalt ferrite doped with Zn2+ and Cd2+ synthesized by auto combustion method

The nanoparticles of Cobalt-ferrite (CoFe2O4), CoZnFe2O4 and CoCdFe2O4 have been synthesized by Auto-combustion method. In this method, nitrates of Co, Fe, Zn and Cd were used as the starting materials, while citric acid has been used as a fuel for the preparation of the samples of CoFe2O4, Co0.9Zn0.1Fe2O4 and Co0.9Cd0.1Fe2O4. Further, the effect of Zn2+ and Cd2+ doping on the structural, thermal and magnetic properties of Cobalt-Ferrite (CoFe2O4) were also investigated as a useful data. Thermal decomposition is confirmed by fast weight loss nearly up to 580.0 °C due to removal of hydroxyl group and after that weight loss has been observed almost negligible up to 1000 °C from the analysis of the TGA plot. In powder XRD results, pure cubic spinel structure of all the composition has been found. With the help of W-H method using XRD data, the crystallite size has been found to be lying in the range from 46.20 nm to 53.30 nm and strain values are obtained from −0.0003 to 0.0008. The FTIR spectra confirmed the presence of MO bond and ferrite in our prepared samples. It may be mentioned on the basis of analysis of results for particle size by two XRD and TEM methods which indicate about the formation of nano materials and doping of cobalt ferrites. Moreover, TEM results have also indicated the presence of nano-sized spherical shape of prepared particles with agglomeration. From analysis of VSM results, the obtained values of coercivity (Hc) have been found for these ferrites between 263.45 Oe and 1408.93 Oe. By the substitution of cobalt magnetic ions with Zn2+ and Cd2+, it is possible to tune the magnetic properties of cobalt ferrite as a promising material for various technological applications.

Sublimation enthalpy of tetrakis(1,1,1,5,5,5-hexafluoro-2,4-pentanedionato)lanthanide(III)-potassium complexes, KLn(C5HF6O2)4: Effect of lanthanide contraction

The mass spectra of tetrakis(1,1,1,5,5,5-hexafluoro-2,4-pentanedionato)lanthanide(III)-potassium complexes KLn(C5HF6O2)4, where Ln = La, Gd, Lu, (hereinafter referred to as KLn(hfa)4), have been recorded at different temperatures. The presence of the high-intensity ions KLn(hfa)3+ generated by elimination of one ligand from the parent species due to electron ionization indicates that the saturated vapours of all three complexes consist of the only KLn(hfa)4 species. The sublimation enthalpies were determined by effusion Knudsen method in frame of second law of thermodynamics. The vaporization was studied over temperature ranges 414 ÷ 471 К for KLa(hfa)4, 401 ÷ 453 К for KGd(hfa)4, and 399 ÷ 442 К for KLu(hfa)4. The values of ΔsubH°(T) equal 170.6 ± 2.1, 166.4 ± 3.6, and 161.8 ± 2.3 kJ/mol for the complexes of La, Gd and Lu respectively.DFT/PBE0 calculations show, that the shortening of the MO bond length due to lanthanide contraction is accompanied by a decrease in the negative net charge on the oxygen atoms bounded with potassium. The potassium ions play the role of the bridges between the [Ln(hfa)4]− anions in the crystal, and weakening the KO ionic bonds can explain the decrease in the enthalpy of sublimation of the lutetium complex in comparison with the lanthanum one.

TiO2 Nanoparticles Modified MoO3 Nanobelts as Electrode Materials with Superior Performances for Supercapacitors

AbstractMoO3, with advantages of abundance, non‐toxicity and multiple oxidation states, has recently been attracted increasing attention in supercapacitors field as a potential electrode material. Here, a novel composite TiO2/MoO3 had been synthesized and characterized by X‐ray diffraction (XRD), Raman spectra, XPS, scanning electron microscope and transmission electron microscope. The electrochemical results showed the composite has enhanced electrochemical properties with the maximum specific capacitance of 141 F g−1 at the current density of 1 A g−1, which is higher than pure MoO3 at the same test condition. The improved electrochemical properties could be attributed to the synergetic effect and the formation of Ti−O−Mo bonds between TiO2 nanoparticles and MoO3 nanobelts and the increment of specific surface area. This work would not only promote the study about MoO3‐based electrode materials in supercapacitors, but also extended to other transition metal oxides with similar structures.

Hole doping in epitaxial MoSe2 monolayer by nitrogen plasma treatment

Many transition-metal dichalcogenides, such as MoSe2, are direct-gap semiconductors at monolayer thickness, which hold potentials in nano-electronics, optoelectronics, and some new concept spin- and valley-electronic applications. For device application, however, controllable doping of the materials is essential. Here we report hole doping of epitaxial MoSe2 by nitrogen (N) plasma treatment with the aim of understanding the defect structure and its electronic characteristics. Examinations by annular dark field scanning transmission electron microscopy clearly reveal substitutional doping of N by replacing Se atoms in MoSe2 monolayer upon N-plasma treatment, though creation of Se vacancies are also possible. Interestingly, we note an unexpectedly high concentration of ‘dual defects’, where both Se atoms in the top and bottom Se layers of MoSe2 at the same lattice site are substituted by N and/or become vacant, suggesting a catalytic effect of defect formation. X-ray photoelectron spectroscopy and electron energy loss spectroscopy confirm the presence of N–Mo bonds. Photoemission spectroscopy reveals an impurity band as well as the Fermi level shift, confirming the p-type doping effect in MoSe2 monolayer by N-plasma treatment. Consistent with the PES results, scanning tunneling spectroscopy measurement also reveal defect states peaked at 0.6–0.7 eV above the valance band maximum. The effectiveness of N-doping is discussed.

Design and Investigation of Molybdenum Modified Platinum Surfaces for Modeling of CO Tolerant Electrocatalysts

Mo overlayers were prepared on smooth polycrystalline platinum and platinized platinum electrode surfaces by in situ electrochemical deposition of molybdenum oxide at potential below 500 mV for modeling Mo–Pt electrocatalysts. Correlations were found between the applied potential and the amount of deposited Mo, which never exceeded a monolayer, thus Pt–Mo bonds stabilize the deposited Mo oxide. Electrochemical measurements suggested that Mo deposited from a Mo(VI) solution was reduced to the 4+ oxidation state. In line with the ex situ XPS findings a certain part (20–25%) of the initial Mo layer remained irreversibly adsorbed on the Pt/Pt electrode even after oxidation into the 6+ state at high potentials; this fractional monolayer cannot be dissolved even by prolonged cyclic polarization up to 1000 mV. It has been demonstrated that the irreversibly bound Mo partial monolayer is enough to change significantly the CO poisoning properties of the Pt surface. On this Mo:Pt (1:4) surface CO oxidation is initiated at extremely low potentials (ca. 100 mV). Moreover, only Pt modified by Mo(IV) species is active in low-potential CO oxidation reaction as after oxidizing the irreversibly adsorbed Mo to the 6+ state, CO oxidation is no longer observable. Nevertheless, the catalyst can be reactivated by reduction of molybdenum into the 4+ oxidation state. However, this reduction requires clean, CO-free Pt surface. If Pt is largely covered by CO, reduction of Mo(VI) into Mo(IV) does not occur and thus the low potential CO oxidation remains hindered.

Crystal structure of the tetra-meth-yl(pheneth-yl)cyclo-penta-dienylmolybdenumtricarbonyl dimer.

The structure of the dimer bis-{tricarbon-yl[η5-tetra-meth-yl(pheneth-yl)cyclo-penta-dien-yl]molybdenum}(Mo-Mo), [Mo2(C17H21)2(CO)6], at 102 K has triclinic (P ) symmetry. The reaction between tetra-meth-yl(pheneth-yl)cyclo-penta-diene and molybdenum hexa-carbonyl in refluxing xylenes for 18 h led to a 56% yield of the dimer as a red solid. The asymmetric unit of the structure is the tetra-meth-yl(pheneth-yl)cyclo-penta-dienylmolybdenumtricarbonyl moiety and the entire dimeric mol-ecule is generated by inversion symmetry. The Mo-Mo bond length is 3.2773 (3) Å, a value slightly above the mean value for all [CpMo(CO)3]2 compounds listed in the CSD and slightly below the mean for [Cp*Mo(CO)3]2 complexes.

Structural change of molybdenum sulfide facilitates the electrocatalytic hydrogen evolution reaction at neutral pH as revealed by in situ Raman spectroscopy

Molybdenum sulfides are promising electrocatalysts for the hydrogen evolution reaction (HER). S- and Mo-related species have been proposed as the active site for forming adsorbed hydrogen to initiate the HER; however, the nature of the interaction between Mo centers and S ligands is unclear. Further, the development of cost-effective water-splitting systems using neutral water as a proton source for H2 evolution is highly desirable, whereas the mechanism of the HER at neutral pH is rarely discussed. Here, the structural change in the Mo−Mo and S−S species in a synthesized molybdenum sulfide was monitored at neutral pH using in situ electrochemical Raman spectroscopy. Analysis of the potential dependent Raman spectra revealed that the band assigned to a terminal S−S species emerged along with synchronized changes in the frequency of the Mo−Mo, Mo3−μ3S, and Mo−S vibrational bands. This indicates that Mo−Mo bonds and terminal S−S ligands play synergistic roles in facilitating hydrogen evolution, likely via the internal reorganization of trinuclear Mo3−thio species. The nature and role of metal-ligand interactions in the HER revealed in this study demonstrated a mechanism that is distinct from those reported previously in which the S or Mo sites function independently.

Construction of a new binding manner in carboxylic acid-functionalized phosphomolybdates.

Carboxylic acid-functionalized polyoxomolybdates have been widely reported. In this study, we tried to establish a new connection pattern between an organic carboxylic acid ligand and inorganic phosphomolybdates by employing N-containing pyridine dicarboxylic acids and two other benzene dicarboxylic acids. Herein, four kinds of organic-inorganic hybrids have been synthesized. Studies reveal that these compounds are dimers, trimer or hexamer, displaying the templating effect of different carboxylic acids. In compound 2, besides the normal C-O-Mo bonds, a new binding manner of C-N-Mo bonds was presented as a linker to connect the organic and inorganic portions, and the polyanion demonstrated the conformation of a hexamer. Moreover, the photochromic properties of these compounds were studied, and the kinetics of the coloration process was analyzed and compared. It seems that based on the aromaticity of their organic ligands, the t1/2 values of the four compounds are much less than those of the compounds functionalized by aliphatic acids.

Tulip-like MoS2 with a single sheet tapered structure anchored on N-doped graphene substrates via C–O–Mo bonds for superior sodium storage

Tulip-like MoS2 with a single sheet tapered structure anchored on N-doped graphene substrates via C–O–Mo bonds shows excellent capacity retention for sodium storage.

Aromaticity-Driven Molecular Structural Variation and Electronic Configuration Alternation: An Example of Cyclic π Conjugation Involving a Mo-Mo δ Bond.

We have synthesized and characterized the mixed-ligand dimolybdenum paddlewheel complex Na[(DAniF)3Mo2(C3S5)] (Na[1]; DAniF = N,N'-di-p-anisylformamidinate, dmit = 1,3-dithiole-2-thione-4,5-dithiolate), which has a six-membered chelating [Mo2S2C2] ring created by equatorial coordination of the dmit (C3S5) ligand to the Mo2 unit. One-electron oxidation of Na[1] using Cp2FePF6 yields the neutral complex [(DAniF)3Mo2(C3S5)] ([1]), and removal of two electrons from Na[1] using AgBPh4 gives [(DAniF)3Mo2(C3S5)]BPh4 ([1]BPh4). In the crystal structures, [1]- and [1] present dihedral angles of 118.9 and 142.3° between the plane defined by the Mo-Mo bond vector and the dmit ligand, respectively, while DFT calculations show that in [1]+ the Mo-Mo bond and the dmit ligand are coplanar. Complex [1] is paramagnetic with a g value of 1.961 in the EPR spectrum and has a Mo-Mo bond distance of 2.133(1) Å, increased from 2.0963(9) Å for [1]-. Consistently, a broad absorption band is observed for [1] in the near-IR region, which arises from charge transfer from the dmit ligand to the cationic Mo25+ centers. Interestingly, complex [1]+ has an aromatic [Mo2S2C2] core, as evidenced by a large diamagnetic anisotropy, in addition to the coplanarity of the core structure, which shifts downfield the 1H NMR signal of the horizontal methine proton (ArN-(CH)-NAr) but upfield those of the vertical protons, relative to the methine proton resonances for the precursor ([1]-). The magnetic anisotropy (Δχ = χ⊥ - χ∥) for the [Mo2S2C2] ring in [1]+ is -105.5 ppm cgs, calculated from the McConnell equation, which is about 2-fold larger than that for benzene. The aromaticity of the [Mo2S2C2] ring is supported by theoretical studies, including single-point calculations and gauge-including atomic orbital (GIAO) NMR spectroscopic calculations at the density functional theory (DFT) level. DFT calculations also show that the [Mo2S2C2] core in [1]+ possesses a set of three highest occupied and three lowest unoccupied molecular orbitals in π character, corresponding to those of benzene in symmetry, and six π electrons that conform to the Hückel 4n + 2 rule for aromaticity. Therefore, this study shows that an aromatic [Mo2S2C2] core is formed by coupling the δ orbital of the Mo≣Mo bond with the π orbital of the C═C bond through the bridging atoms (S), thus validating the equivalency in bonding functionality between δ and π orbitals.

Bimetallic Carbide as a Stable Hydrogen Evolution Catalyst in Harsh Acidic Water

Cheap, efficient, and stable hydrogen evolution reaction (HER) electrocatalysts have long been pursued, owing to their scientific and technological importance. Currently, platinum has been regarded as the benchmarked HER electrocatalyst. Unfortunately, the low abundance and high cost impede its industrial applications. Here, we synthesize bimetallic carbide Mo6Ni6C grown on nickel foam as a HER catalyst, delivering a low overpotential of −51 mV at −10 mA cm–2 in 0.5 M H2SO4 for more than 200 h, which is among the best reported benchmarked HER catalysts in acid to date. On the basis of experimental observations and theoretical modeling, we ascribe the good activity to the proper Gibbs free energy of adsorbed hydrogen (ΔG(H*)) for the carbon active sites and attribute the stability to the corrosion-stable Mo–Mo bonds in the crystal structure. This work demonstrates the possibility for Mo6Ni6C to be one of the best candidates for HER electrocatalysts in the large-scale electrolysis industry.

Insights into the improvement effect of Fe doping into the CeO2 catalyst for vapor phase ketonization of carboxylic acids

The conversion of carboxylic acid through ketonization process reduces O-atoms and increases CC bonds, which can provide attractive routes for upgrading biomass feedstocks into biofuels. The key factors influencing the surface ketonization activity over CeO2-based oxides catalysts remain matters of active discourse. Here, a series of Ce1-xFexO2-δ catalysts were investigated for vapor-phase ketonization of acetic and propionic acid. The catalysts were characterized in detail using various physico-chemical techniques both before and after reaction to gain understanding of the ketonization process. The turnover frequency (TOF) based on the basic sites changed with the Fe content. The Ce0.8Fe0.2O2-δ sample showed the prominent ketonization activity with the highest TOF value. On one hand, for samples with a lower Fe addition (x<0.3), the formed CeO2-like solid solution with numerous Ce-O-Fe species showed a dramatic increase in surface oxygen vacancies. These oxygen vacancies were beneficial to catalytic performance. Moreover, the superior redox properties with weaken MO bonds of Ce-O-Fe species thereby promote the ketonization activity. On the other hand, the higher Fe addition (x>0.3) caused the damage of the Ce-O-Fe structure, thus reducing ketonization activity. Notably, the investigation of the reaction temperature regime of Ce0.8Fe0.2O2-δ sample directly proved the existence of surface redox cycle during the ketonization process.

Reaction of SO2 with Group IV and VI transition metal oxide clusters

The addition of SO2 to the Group IV (MO2)n and VI (MO3)n (n = 1, 2, 3) nanoclusters was studied using density functional theory (DFT) and coupled cluster theory (CCSD(T)). Structures and ligand binding energies were predicted for the Lewis acid-base addition (physisorption), or SO32− or SO42− formation (chemisorption) of SO2 to these clusters. Physisorption is predicted to be thermodynamically allowed for the Mo and W clusters at 298K, and for Cr only at lower temperatures. Chemisorption by SO42− formation is thermodynamically allowed only for Cr clusters due to the higher reducibility of the metal center. Correlations were made between the ligand binding energies (LBEs) of the (MO3)nSO2 clusters and the chemical properties of the parent (MO3)n clusters (Lewis acidity, reducibility, and MO and MO bond strengths). Physisorption and chemisorption by SO32− formation is predicted to be thermodynamically possible for Group IV clusters, and SO4−2 formation is predicted not to occur, suggesting that sulfate formation does not proceed by the direct reaction of a pure metal oxide surface and SO2.

Crystal structures, DFT calculations, and Hirshfeld surface analyses of two new copper(II) and nickel(II) Schiff base complexes derived from meso-1,2-diphenyl-1,2-ethylenediamine

Two new Ni(II) and Cu(II) complexes of a tetradentate Schiff base ligand (1 and 2, respectively), derived from the condensation of meso-1,2-diphenyl-1,2-ethylenediamine with 2-hydroxy-6-methoxy benzaldehyde, were synthesized and characterized by IR, UV–Vis, 1H NMR spectroscopy, and X-Ray crystallography. The central metal ions in both complexes are coordinated via the N2O2 coordination sphere of the ligand with square-planar geometry. DFT results revealed that the MN and MO interactions (M = Ni, Cu) are weaker than the typical covalent single bond indicating that ionic and electrostatic interactions are dominated in MN and MO bonds. Hirshfeld surface (HS) analyses of the studied structures 1 and 2 have been performed. The study using 3D HSs and 2D fingerprint plots (FPs) highlighted the dominant contacts H⋯H, C⋯H/H⋯C and O⋯H/H⋯O in both structures, and H⋯Cl in 2. The molecular assemblies held by C⋯O/O⋯C (in 1) and C⋯C (in 1 and 2) type dipole–dipole interactions are also found in the crystal packing contributing towards stability. The significant contributions arising from the mentioned interactions in crystal packing are also revealed from the Hirshfeld surface FPs showing a major contribution to total HS area for the H⋯H contacts for both structures.

Synthesis, X-ray Structure Analysis and Spectroscopic Characterization of trans-Aquabis(µ-benzoato-κ2 O:O′) bis[µ-N,N′-bis(4-methoxyphenyl) formamidinato-κ2 N:N′] dimolybdenum(II)

The title compound, trans-Mo2(DAniF)2(OOCC6H5)2(H2O) (I) has a quadruply bonded Mo2 4+ unit equatorially coordinated by two N,N′-bis(4-methoxyphenyl)formamidinate (referred as DAniF) ligands and two benzoate (OOCC6H5) groups in transverse, and axially coordinated by one aqua oxygen atom. The compound crystallizes in the space group C2/c with one molecule in the asymmetric unit and features a Mo–Mo bond length of 2.0983(4) A, which is typical for dimolybdenum quadruple bonds. In the crystal, the offset π–π stacking between pairs of phenyl rings creating a one-dimensional linear chain perpendicular to the Mo–Mo directions, with a distance between phenyl rings of 3.44 A and the center-to-center distance of 3.83 A. The coordinated water oxygen atoms act as donors and uncoordinated methoxyl group oxygen atoms act as acceptors in intermolecular O–H⋯O hydrogen bonds. π–π stacking between phenyl rings assemble the molecules into a three-dimensional framework. The offset π–π stacking between phenyl rings of quadruply bonded Mo2 4+ paddle-wheel molecules create a one-dimensional linear chain.