Methanone Ligands Research Articles

Syntheses, Structural Characterization of Nickel and Zinc Coordination Polymers Composed of Dicarboxylate and Bis(4-(1H-benzo[d]imidazol-1-yl)phenyl)methanone Ligands

Syntheses, Structural Characterization of Nickel and Zinc Coordination Polymers Composed of Dicarboxylate and Bis(4-(1H-benzo[d]imidazol-1-yl)phenyl)methanone Ligands

Synthesis and structural characterization of zinc and cadmium coordination polymers constructed by 2-phenylbutanedioic acid and bis(4-(1H-imidazol- 1-yl)phenyl)methanone ligands

Two coordination polymers [(L1)Zn(pbtda)]n (1) and [(L1)Cd(H2O)(pbtda)]n (2), (L1 = bis(4-(1H-imidazol-1-yl)phenyl)methanone, H2pbtda = 2-phenylbutanedioic acid) are prepared under solvothermal conditions. They are characterized by elemental analyses, IR spectroscopy, and X-ray crystallography. Complex 2 forms a 1D chain, while complex 1 has a 2D structure of the {44·62} topology along the [1 0 –2] direction.

Syntheses of cobalt and nickel coordination polymers composed of 1,3-adamantanedicarboxylate and bis(4-(1H-imidazol-1-yl)phenyl)methanone ligands

Two coordination polymers, {[Co2(L1)2(adc)2]·5H2O}n (1) and {[Ni(L1)2(Hadc)2]}n (2) (L1 = bis(4-(1H-imidazol-1-yl)phenyl)methanone, H2adc = adamantane-1,3-dicarboxylic acid), have been synthesized and structurally characterized. In 1, Co1 is five-coordinated by three oxygen atoms of two adc2- and two nitrogen atoms from two L1 ligands. The neighboring [Co(adc)]2 dimers are linked through four L1 ligands to form a 1D ladder structure. In 2, Ni1 is six-coordinated by two oxygen atoms from two Hadc- ligands, four nitrogen atoms from four distinct L1 ligands to give a slight distorted octahedral geometry. The [Ni(Hadc)2] units are bridged by L1 ligands to form 1D looped chains.

Syntheses, Structural Characterization of Two Cobalt Coordination Polymers Composed of Isophthalate and Bis(4-(1H-imidazol-1-YL)phenyl)methanone Ligands

Syntheses, Structural Characterization of Two Cobalt Coordination Polymers Composed of Isophthalate and Bis(4-(1H-imidazol-1-YL)phenyl)methanone Ligands

Continuous flow hydrogenation with Pd complexes of pyridine‐benzotriazole ligands

AbstractThe use of continuous flow systems in chemical synthesis provides great advantages in terms of sustainability, efficiency, and safety. The ability to control reaction parameters such as temperature, pressure, and catalyst exposure in flow system enables rapid optimization of reaction conditions. In the present study, palladium complexes of 1‐(piridin‐2‐il)‐1H‐benzo[d][1,2,3]triazol, N‐((1H‐benzo[d][1,2,3]triazol‐1‐il)metil)piridin‐2‐amin, and (1H‐benzo[d][1,2,3]triazol‐1‐yl)(pyridin‐2‐yl)methanone ligands were synthesized and characterized. The catalytic activities of complexes are investigated in the hydrogenation of various alkenes such as styrene, cyclohexene, and 1‐octene under continuous flow conditions. The complexes showed very high activity at 10‐bar H2 pressure and 50°C for short periods of 5–10 min. The catalysts reused for 10 cycles with no significant loss of catalytic activity.

Syntheses of cobalt and cadmium coordination polymers composed of dicarboxylate and bis(4-(1H-imidazol-1-yl)phenyl)methanone ligands

Two coordination polymers {[Co(L1)2(H2O)2](fdc)(H2O)2.5}n (1) and [Cd(L1)(tpdc)(H2O)]n (2) (L1 = bis(4-(1H-imidazol-1-yl)phenyl)methanone, H2fdc = furan-2,5-dicarboxylic acid, H2tpdc = thiophene-2,5-dicarboxylic acid) are synthesized and structurally characterized by IR, EA, and single crystal X-ray diffraction analyses. In 1, Co1 has a distorted octahedral geometry with two oxygen atoms of water molecules and four nitrogen atoms from four L1 ligands to give a distorted octahedral coordination geometry. The [Co(L1)2]2 units are bridged by L2 ligands to form 1D chains. In 2, Cd1 is seven-coordinated by four O atoms from two tpdc2– ligands, one O atom from a coordinated water molecule, and two N atoms from two distinct L1 ligands. Complex 2 possesses a 4-connected net topology with the point symbol {44·62}.

Synthesis and Structural Characterization of a Cobalt Coordination Polymer with Formate and Bis(4-(1H-imidazol-1-yl)phenyl)methanone Ligands

A cobalt coordination polymer, {[Co(L1)2(H2O)2] · (HCOO)2 · H2O}n, where L1 is a bis(4-(1H-imidazol-1-yl)phenyl)methanone, has been synthesized and characterized by infrared spectroscopy, elemental analysis, and single-crystal X-ray diffraction. The crystal crystallizes in the triclinic sp. gr. $$P\bar {1}$$ with the unit cell parameters a = 7.9504(6), b = 10.0231(7), c = 13.3129(8) A, and α = 88.399(5)°, β = 75.310(6)°, γ = 79.179(6)°, Z = 1. The Co2+ ion has a distorted octahedral environment with two O atoms from two water molecules and four N atoms from four L1 ligands. A thermal stability of polymer has been discussed.

Synthesis and structural characterization of a Cu(I) complex with 4-(1H-imidazol-1-yl)phenyl)methanone ligands

A copper complex with V-shaped ligands, [(L1)Cu2Cl2] n (1), (L1 = 4-(1H-imidazol-1-yl)phenyl) methanone) has been synthesized and characterized by IR spectroscopy, elemental analyses and singlecrystal X-ray diffraction. The crystal of 1 is monoclinic, sp. gr. C2/c with the unit cell parameters a = 17.9496(13), b = 15.3440(13), c = 7.2983(7) A, and β = 112.875(6)°, Z = 4, R1 = 0.0681, and wR2 = 0.1736 (I > 2 σ). The solid state structure of 1 consists of 2D metal aromatic chloride layers, which are propagating along the bc plane to form a 3D network through hydrogen bonds.

Synthesis and structural characterization of Mn(II) and Cu(II) complexes with bis(4-(1H-imidazol-1-yl)phenyl)methanone ligands

Abstract Two complexes, {Mn(hfac)2(BIPMO)} n (1), {Cu(hfac)2(BIPMO)} n (2) [hfac=1,1,1,5,5,5-hexafluoro-pentane-2,4-dionato(–), BIPMO=bis(4-(1H-imidazol-1-yl)phenyl)methanone], with the V-shaped ligands were synthesized and characterized by infrared spectroscopy, elemental analyses, along with single-crystal X-ray diffraction analyses. The X-ray diffraction studies have shown that the metal ions in 1 and 2 are both six-coordinated to two nitrogen atoms of two BIPMO ligands and four oxygen atoms of two hfac ligands to form a distorted octahedral geometry. Each BIPMO ligand acts as a bridging ligand to link two adjacent metal(II) atoms to form a helical chain in the crystal structure.

Syntheses, crystal structures, and characterization of two Mn(II) coordination polymers with bis(4-(1H-imidazol-1-yl)phenyl)methanone ligands

Abstract Two Mn(II) complexes, {[Mn(BIPMO)2Cl2] · 2(H2O)} n (1) and {[Mn(BIPMO)2(SCN)2] · 2(CH3OH)} n (2) (BIPMO = bis(4-(1H-imidazol-1-yl)phenyl)methanone) with V-shaped BIPMO ligands, were synthesized and characterized by IR spectroscopy and elemental analyses along with their single-crystal X-ray diffraction analyses. The Mn(II) ions in 1 and 2 are both six-coordinated to four nitrogen atoms of four BIPMO ligands and two anions (Cl− for 1, and SCN− for 2) to form a distorted octahedral geometry.

Trans-Tetraaquabis[bis(pyridin-3-yl)methanone-κN]manganese(II) bis(perchlorate)

In the title complex, [Mn(C11H8N2O)2(H2O)4](ClO4)2, the Mn2+ ion is located on an inversion center with the slightly distorted N2O4 octa­hedral coordination sphere comprising N-atom donors from two monodentate trans-related bis­(pyridin-3-yl)methanone ligands and four water ligands. The two perchlorate anions are linked to the mononuclear complex mol­ecule through water O—H⋯O hydrogen bonds while inter-complex water O—H⋯N(pyridine) inter­actions form an infinite chain structure extending along the b axis. The perchlorate anions also function as inter-unit links through water O—H⋯O hydrogen bonds which, together with water O—H⋯O(carbon­yl) inter­actions, give a three-dimensional framework structure.

Catena-Poly[[copper(II)-bis[μ-bis(pyridin-3-yl)methanone-κ2N:N′]] bis(tetrafluoridoborate)

In the title complex, {[Cu(C11H8N2O)2](BF4)2}n, the CuII ion is situated on an inversion centre and adopts an N4F2 octa­hedral coordination geometry with four N atoms from four different bis­(pyridin-3-yl)methanone ligands at the equatorial sites and two independent tetra­fluoridoborate anions weakly bonded at the axial sites via two F atoms [Cu⋯F = 2.613 (3) Å]. Chains with the bridging ligands are formed along the a axis. C—H⋯F inter­actions stabilize the structure. C—O⋯π inter­actions also occur.

Catena-Poly[(dichloridozinc)-μ-bis(pyridin-3-yl)methanone-κ2N:N′

In the title polymer, [ZnCl2(C11H8N2O)]n, the ZnII atom lies on a twofold rotation axis and has a distorted tetra­hedral ZnCl2N2 geometry involving two chloride donors and two N-atom donors from μ2-bridging bis­(pyridin-3-yl)methanone ligands, which also have twofold symmetry. A zigzag chain structure is formed, extending along (001). Each chain is surrounded by three others which are inter­connected through weak C=O⋯πpyrid­yl [O⋯centroid = 2.999 (3) Å] and πpyrid­yl–πpyrid­yl inter­actions [minimum ring centroid separation = 4.014 (2) Å], giving a three-dimensional framework.

Trans-Dichloridobis[(6-nicotinoyl-2-pyridyl-κN6)(3-pyridyl-κN)methanone]copper(II)

In the title complex, [CuCl2(C17H11N3O2)2], the CuII ion is located on an inversion center. It exhibits a distorted octa­hedral coordination geometry defined by two chloride anions at trans sites and four 3-pyridyl N atoms at equatorial sites from two (6-nicotinoyl-2-pyrid­yl)(3-pyrid­yl)methanone ligands. The (6-nicotinoyl-2-pyrid­yl)(3-pyrid­yl)methanone ligand can be viewed as having two pendant 3-pyridyl rings attached to a central pyridyl skeleton via separate carbonyl bridges, acting in a κ2 N,N′-chelating mode with its 3-pyridyl N atoms bound to the CuII ion. The pendant 3-pyridyl rings make a dihedral angle of 80.76 (5)°. In the crystal, mol­ecules are linked through inter­molecular C—H⋯π and C—H⋯O inter­actions, forming a three-dimentional framework.

Highly efficient red phosphorescent Ir(III) complexes for organic light- emitting diodes based on aryl(6-arylpyridin-3-yl)methanone ligands

A series of phosphorescent Ir(III) complexes 1– 4 were synthesized based on aryl(6-arylpyridin-3-yl)methanone ligands, and their photophysical and electroluminescent properties were characterized. Multilayer devices with the configuration, Indium tin oxide/4,4′,4″-tris( N-(naphthalene-2-yl)- N-phenyl-amino)triphenylamine (60 nm)/4,4′-bis( N-(1-naphthyl)- N-phenylamino)biphenyl (20 nm)/Ir(III) complexes doped in N, N′-dicarbazolyl-4,4′-biphenyl (30 nm, 8%)/2,9-dimethyl-4,7-diphenyl-phenathroline (10 nm)/tris(8-hydroxyquinoline)-aluminum (20 nm)/lithium quinolate (2 nm)/ Al (100 nm), were fabricated. Among these, the device employing complex 2 as a dopant exhibited efficient red emission with a maximum luminance, luminous efficiency, power efficiency and quantum efficiency of 16200 cd/m 2 at 14.0 V, 12.20 cd/A at 20 mA/cm 2, 4.26 lm/W and 9.26% at 20 mA/cm 2, respectively, with Commission Internationale de l'Énclairage coordinates of (0.63, 0.37) at 12.0 V.