Hmt Ligands Research Articles

Ultrasound irradiation synthesis and crystal structure of Co(II) thiocyanate supramolecular complex: Photocatalytic and sonocatalytic degradation of methyl violet 2B dye

∞3[{Co(hmt)2(NCS)2(H2O)2}{Co(NCS)2(H2O)4}(2H2O)] supramolecular complex (SC) had been synthesized through self‐assembly reaction using the sonochemical method at ambient conditions. The structure was fully characterized by single‐crystal X‐ray diffraction and spectroscopic methods. The structure consists of two separate distinct complexes containing two crystallography and chemically different CoII atoms, four thiocyanate ligands, two hmt ligands, six coordinated water molecules, and one uncoordinated water molecule. The two CoII (SCN)2 fragments adopt 1D chains which extend three dimensionally via strong H bonds. Radiation catalysis is a promising wastewater treatment method, which is used to remove dyes under UV and ultrasonic radiation in the presence of a heterogeneous catalyst. SC exhibits efficient heterogeneous catalysis for degradation of methyl violet 2B (MV2B) dye which was used as a model pollutant in presence of H2O2 under ambient conditions. UV irradiation and ultrasonic irradiation reveal significant enhancement in degradation efficiency and time. The morphological features of SC are examined by transition electron microscopy (TEM) and scanning electron microscopy (SEM) before and after degradation.

Varying the Dimensionality of Cu(II)-Based Coordination Polymers Through Solvent Influence

This work reports the synthesis and structure of a large porous zeotype network observed within compound (1) using {Cu2(piv)4} as the linking unit (piv = pivalate). The slow in situ formation of the hmt ligand (hexamethylenetetramine) appears to be key in generating a µ4-bridging mode of the hmt-node. Attempts to improve the low yield of compound (1) using different solvent layer diffusion methods resulted in the µ3-hmt complexes (2) and (3). Both compounds exhibit a 3D network of two intertwined chiral networks. Strong hydrogen bonding present in (3) leads to the formation of intertwined, DNA-like double-helix structures. The use of bulky solvents in the synthesis of compound (4) leads to the structure crystallizing solvent-free. The packing of (4) is dominated by energy minimization, which is achieved when the 1D-“cylinders” pack into the closest possible arrangement. This work highlights the potential for solvent controlled synthesis of extended copper-hmt systems.

Single Crystal of New Nanostructure Self-Assembled Copper–Cyanide and Hexamethylenetetramine as an Efficient Supramolecular Coordination Polymer Catalyst

Yellow prismatic nanoparticles of the supramolecular coordination polymer (SCP) [Cu6(CN)7(C6H12N4)2(OH3)], 1 were obtained by the reaction of K3[Cu(CN)4] and hexamethylenetetramine (hmt) in presence of Me3SnCl at ambient conditions. The X-ray structure of 1 consists of many rhombic [(Cu)2µ3–(CN)2] motifs which construct eight fused cyclic rings accommodating two hmt ligands. The copper atoms exhibit pseudo-tetrahedral configuration. The cyanide ligands create the bifurcated µ3-CN bridges. The [(Cu)2µ3–(CN)2] motifs causes expansion of the structure of 1 to three dimensions while extensive H-bonds play an essential role in packing structure. SCP 1 was used as an efficient heterogeneous catalyst for oxidative mineralization of acid blue-92 (AB-92), textile dye, with H2O2. The study aimed to investigate the efficiency of recycled the catalyst 1 and the mechanism of degradation of AB-92. The morphological feature of the SCP 1 as a catalyst before and after catalysis was examined by high resolution transmission electron microscope (TEM).

Structural Design of Zeolitic Cluster Organic Frameworks from Hexamethylentetramine and Copper-Halide Clusters

Zeolitic cluster organic frameworks constructed with two different tetrahedral units, hexamethylenetetramine (hmt) and hmt-type [Cu4Cl6]2– clusters, are realized in this work for the first time. By using a tetrahedral hmt ligand to assemble in situ hmt-type Cu4Cl6 clusters, a three-dimensional cluster organic framework with lonsdaleite (lon) topology is successfully built to host the two-dimensional honeycomb-like metal–organic complex. Furthermore, a series of cluster organic frameworks based on hmt and other well-defined copper-halide clusters, such as Cu2Cl3, Cu3Cl2, Cu4Cl4, Cu5Cl6, and Cu6Cl6, are also presented, which exhibit rich topological nets. These compounds are further investigated by infrared, powder X-ray diffraction, thermogravimetric analysis, infrared and photoluminescent spectroscopy. Photoluminescent studies reveal that these compounds display yellow green emissions based on halide to metal charge transfer. This work reveals a versatile synthetic method to generate a large family of copper-halide cluster organic frameworks with hmt ligands.

Six new metal(II) complexes with 3D network structures based on carboxylate and hexamethylenetetramine: Syntheses and structures

Hexamethylenetetramine (hmt) reacted with Cd(II), Ag(I) and Zn(II) salts of carboxylic acids and resulted in the formation of six novel coordination architectures, [Cd(hmt)2(L1)2H2O] (1) (L1=1,3-benzodioxole-5-carboxylate), [Cd(hmt)2(L2)2(H2O)2] (2) (L2=2-methyl-2-phenoxypropionate), [Ag(hmt)(L3)]·H2O (3) (L3=2-hydroxy-5-(phenyldiazenyl)benzoate), [Cd(hmt)2(L4)2(H2O)] (4) (L4=3-(4-methoxyphenyl)acrylate), [Cd(hmt)(L5)2(H2O)2]·2H2O 5 (L5=3,5-dinitrobenzoate) and [Zn(hmt)(L6)2)]2 (6) (L6=o-chlorobenzoate). All the complexes have been structurally characterized by elemental analysis, IR, TG and X-ray diffraction analysis. The different coordination modes of the carboxylate anions and the hmt molecules lead to a wide range of different coordination structures. All these complexes display 3-D framework structures as a result of a number of non-conventional weak interactions. The carboxylate groups adopt monodentate and bidentate chelating coordination modes. The μ1-hmt, μ2-hmt and μ3-hmt modes were found for the tetradentate hmt ligand. The central metal ions are coordinated in N2O5, N2O4, NO4 and N3O fashions, depending on the center metals and the ancillary ligands. In addition, the frameworks of the six compounds are thermally stable up to 200°C.

Syntheses, structures and luminescence of silver(I) sulfonate complexes with nitrogen-containing ligands

In this paper, three new Ag(I) coordination compounds, namely, AgL(3-iso)2 (1), [Ag4L4(bipy)4]·bipy·CH3CN·6H2O (2) and [Ag10L8(hmt)10(H2O)4]·(L)2·15H2O (3) (where 3-iso=3-methylisoquinoline, bipy=4,4′-bipyridine, hmt=hexamethylenetetramine and L=4-chloro-benzenesulfonate anion), have been synthesized by varying the nitrogen-containing secondary ligands. In compound 1, Ag(I) atoms are coordinated by 3-iso ligands and L anion to generate a discrete molecular structure. For compound 2, when the 3-iso ligand was replaced by bipy, Ag(I) atoms of 2 are linked by bipy ligands to generate a 1D polymeric chain, which are further expanded to a double chain through Ag⋯Ag interaction. In 3, the hmt ligands connect Ag(I) atoms to give a undulate 2D layer. These results indicate that the nitrogen-containing secondary ligands play important roles in the structural formation of the Ag(I) complexes. Moreover, the luminescent properties, elemental analyses and IR spectroscopy of these compounds were also studied.

Structural and property studies on metal–organic compounds with 3-D supramolecular network

Two carboxylato-bridged allomeric compounds, {[Cu2(dbsa)2(hmt) (H2O)4]1/2·2H2O}n (1), {[Ni(dbsa)(H2O)2]1/2[Ni(dbsa)(hmt)(H2O)2]1/2·2H2O}n (2) (H2dbsa=meso-2,3-dibromosuccinic acid, hmt=hexamethylenetetramine) have been synthesized and characterized by X-ray structral analyses. The metal ions have two kinds of coordination fashion in one unit, and bridged by carboxylate and hmt ligands along with weak interactions existing in the solid structure, forming a 3-D supramolecular network. Variable-temperature magnetic property studies reveal the existence of antiferromagnetic interactions in 1 and 2 with g=2.2, J1=−3.5cm−1, J2=−2.8cm−1 for 1, and g=2.1, J=−3.5cm−1 for 2.

Two cobalt(II) coordination polymers constructed from tetrafluoroterephthalate and hexamethylenetetramine ligands

Two cobalt(II) coordination polymers, {[Co(Hmt)2(tfbdc)(H2O)2]·(H2tfbdc)·(EtOH)2}n (1) and {[Co(Hmt)(tfbdc)(H2O)2]·(H2O)2}n (2) (H2tfbdc = 2,3,5,6-tetrafluoroterephthalic acid; Hmt = hexamethylenetetramine) have been synthesized and characterized by physicochemical and spectroscopic methods, thermogravimetric analysis, and single-crystal X-ray diffraction. In both complexes, the coordination environment around cobalt is distorted octahedral. In 1, each Co(II) atom is linked by tfbdc2− anionic ligands to form a 1D zigzag chain, which is further connected into a 3D network via hydrogen bond interactions. In 2, each Co(II) atom is bridged by anionic tfbdc2− and Hmt ligands along two directions, respectively, forming an infinite 2D structure with a parallelogram-type grid; the 2D networks are further assembled to a 3D framework via intermolecular hydrogen bond interactions. Both complexes show blue fluorescence in the solid state at room temperature. Two new coordination polymers, {[Co(Hmt)2(tfbdc)(H2O)2]·(H2tfbdc)·(EtOH)2}n (1) and {[Co(Hmt)(tfbdc)(H2O)2]·(H2O)2}n (2) have been obtained via the reactions of H2tfbdc, Hmt, and cobalt chloride hexahydrate in different molar ratios and solvents.

Construction of a series of inorganic–organic hybrid coordination polymers based on hexamethylenetetramine and sulfonate ligands

In this article, six silver sulfonate coordination polymers, namely [Ag(L1)(hmt)] ( 1), [Ag(L2)(hmt)(H 2O)] ( 2), [Ag(L3)(hmt)] (H 2O) ( 3), [Ag 2(L4)(hmt) 2] 2(CH 3OH) ( 4), [Ag 6(L5) 6(hmt) 6] 18(H 2O) ( 5) and [Ag 6(L6) 6(hmt) 6] 16(H 2O) ( 6) (where hmt = hexamethylenetetramine, L1 = 2-amino-5-chlorobenzenesulfonate anion, L2 = 2-amino-4-methyl-benzenesulfonate anion, L3 = 4-hydroxy-benzenesulfonate anion, L4 = 1,5-naphthalenedisulfonate anion, L5 = l-(−)-camphorsulfonate anion and L6 = d-(+)-camphorsulfonate anion), have been synthesized. In 1, Ag(I) centers are linked by hmt ligands to generate a 1D polymeric chain. The chains are further bridged by the L1 anions to form a 2D layer. In 2, Ag(I) centers are connected by hmt ligands to generate a 1D chain structure. In 3, Ag(I) centers are bridged by hmt ligands to form a 2D layer. In 4, hmt ligand connects Ag(I) center to form hexagonal honeycomb 6 3- hcb layers, which are further bridged by L4 anions to generate a 3D pillared layered structure with (6 3)(6 5 8) topology. Compounds 5 and 6 are opposite enantiomers structures based on the known enantiomers of the sulfonate anions, and the adjacent Ag(I) centers are bridged by the hmt ligands to generate an infinite wavy 2D infinite layer of hexagonal units.

Catena-Poly[[[aqua(pyridine-4-carboxylato-κN)silver(I)]-μ-hexamethylenetetraamine-κ2N:N′] dihydrate

In the title compound, {[Ag(C6H4NO2)(C6H12N4)(H2O)]·2H2O}n, the AgI atom shows a distorted triangular pyramidal geometry,, formed by two N atoms from two hexa­methyl­ene­tetra­amine (hmt) ligands and one N atom from a pyridine-4-carboxyl­ate (4-pdc) ligand and one water mol­ecule. The hmt ligands bridge the Ag atoms, forming a chain along [001]. The carboxyl­ate group of the 4-pdc ligand is uncoordinated. O—H⋯O hydrogen bonds between the water mol­ecules and carboxyl­ate groups stabilize the structure.

Catena-Poly[[(4-aminobenzoato)aquasilver(I)]-μ-hexamethylenetetramine

In the title coordination polymer, [Ag(C7H6NO2)(C6H12N4)(H2O)]n, the AgI ion is five-coordinated by two carboxyl­ate O atoms from one 4-amino­benzoate anion (L), two N atoms from two different hexa­methyl­enetetramine (hmt) ligands, and one water O atom in a distorted square-pyramidal geometry. The metal atom lies on a mirror plane and the L anion, hmt ligand and water mol­ecule all lie across crystallographic mirror planes. Each hmt ligand bridges two neighboring AgI ions, resulting in the formation of a chain structure along the b axis. The chains are linked into a three-dimensional framework by N—H⋯O and O—H⋯O hydrogen bonds.

Diverse structural assemblies and variable conductivities of silver-hexamethylenetetramine coordination polymers with 2-, 3-, and 4-sulfobenzoate ligands

Self-assembly reactions of sulfobenzoates and Ag(I)-hmt system resulted in the formation of one previously reported complex, {[Ag4(hmt)2(2-sb)2(H2O)]·2H2O}n (1), and two new silver-sulfobenzoate complexes {[Ag4(hmt)2(3-sb)2(H2O)2]·2H2O}n (2), and {[Ag3(hmt)2(4-sb)(NO3)(H2O)]·3H2O}n (3) (sb = sulfobenzoate and hmt = hexamethylenetetramine). These coordination polymers were characterized by single-crystal X-ray analyses, elemental analyses, IR spectra, TG analyses, fluorescence studies, and electric conductivity. Complexes 2 and 3 are 3D coordination networks having novel topologies with different channels, where the Ag–Ag bonds play vital roles. In these complexes, hmt ligands act as μ3- and μ4- bridges in 1 and 3, and just μ4- in 2. The configurations of the Ag-hmt units in 1–3 are different: chair types in 1 and 2, and boat type in 3. The disparately relative positions of carboxylate and sulfonate groups on benzyl rings of 2, 3, and 4-sulfobenzoate ligands and the different coordination modes of sulfobenzoates lead to the different dimensionalities and networks. The different packing environments of Ag–Ag bonds in 1–3 (no Ag–Ag interaction in 1 and the strongest Ag–Ag interactions in 2) result in the distinct fluorescence properties and electric conductivity. There is no any study of electric conductivity for Ag-hmt complexes in the references so far, and the complex 2 has the best electric conductivity in all our reported Ag-sulfobenzoate complexes.

Influence of anionic sulfonate-containing and nitrogen-containing mixed-ligands on the structures of silver coordination polymers

In this article, a series of mixed-ligand Ag(i) coordination polymers, namely, Ag(L1)H(2)O (), Ag(2)(hmt)(2)(L1)(2) (), [Ag(HL2)]H(2)O (), [Ag(L2)(biim)][Ag(biim)] (), [K(5)(L3)(2)][Ag(H(2)O)(2)] (), [Ag(2)(L3)(3-iso)][Ag(3-iso)]5H(2)O (), [Ag(3)(L3)(bipy)(3)(H(2)O)]6H(2)O (), [Ag(3)(L3)(biim)(3)]H(2)O (), and [Ag(3)(L3)(hmt)(2)(H(2)O)(3)]H(2)O () (where hmt = hexamethylenetetramine, bipy = 4,4'-bipyridine, biim = 1,1'-(1,4-butanediyl)-bis(imidazole), 3-iso = 3-methylisoquinoline, L1 = 2,5-dichloro-4-amino-benzenesulfonate anion, L2 = 2-nitroso-1-naphthol-4-sulfonate anion and L3 = 4-hydroxy-5-nitro-1,3-benzenedisulfonate anion), have been synthesized by varying the anionic sulfonate-containing ligands and nitrogen-containing secondary ligands. Compounds and were synthesized through their parent compounds and , respectively, while were obtained by their parent compound . Ag(i) centers of are linked by L1 anions to generate a 1D polymeric chain, while Ag(i) centers of are bridged by hmt ligands to form a 2D polymeric layer. In , Ag(i) centers are connected by L2 anions to yield a 1D double chain, whereas Ag(i) centers in are joined by biim ligands and L2 anions, generating an unusual anionic chain and a cationic chain, respectively. In , Ag(i) centers are coordinated by water molecules, and K(i) cations are coordinated by L3 anions to form a pillared layered structure with inorganic layers and organic pillars. In , Ag(i) centers are coordinated by 3-iso ligands and L3 anions to generate a discrete molecular structure. In , bipy ligands bridge Ag(i) centers to give Ag-bipy chains, which are further linked by L3 anions to produce a 2D polymeric layer. In , Ag(i) centers are bridged by biim ligands to generate a 1D polymeric chain. In , the hmt ligands connect Ag(i) centers to give a binodal (3,4)-connected net with (6(3))(6(5).8)(2) topology. These results indicate that anionic sulfonate-containing ligands and the nitrogen-containing secondary ligands play important roles in the structural formation of the Ag(i) complexes. Additionally, the luminescent properties, elemental analyses and IR spectroscopy of these compounds were also studied.

Synthesis, spectra, crystal structure and thermal properties of a polymeric 1-D cobalt(II) cyanato complex with hexamethylenetetramine

A new cobalt(II) cyanato complex, [Co(NCO)2(H2O)2(hmt)] (I) where hmt is hexamethylenetetramine, has been synthesized and structurally characterized. The electronic spectra of the solid compound suggest octahedral cobalt and IR spectra revealed monodentate N-cyanato groups and aqua ligands, while hmt is a bridging N, N′-bidentate leading to a 1-D infinite polymeric chain. The structure has been confirmed from single crystal X-ray diffraction. Crystal data for I : Fw 319.20, a = 9.234(2), b = 11.252(2), c = 12.576(3) Å, β = 107.75(3)°, V = 1244.5(4) Å3, Z = 4, T = 100 K. Crystal system : monoclinic, space group : C2/c. Hydrogen bonds of the type O–H ··· O and O–H ··· N between aqua molecules and O atom of the terminal N-cyanato groups or an N atom of hmt ligands consolidate and extend the structure to a 3-D network. The thermal properties of I are reported. 1Deceased.

Synthesis and structure of the three‐dimensional coordination polymer [Ag3hmt3(μ3 ‐btc)]·5H2O

AbstractA new coordination polymer, [Ag3hmt3(μ3 ‐btc)]·5H2O (1) (hmt = hexamethylenetetramine, btc=1,3,5‐benzenetricarboxlic), has been successfully synthesized. Crystal data: P21/a, a = 11.9906(2) Å, b = 17.3689(2) Å, c = 16.96100(10) Å, β = 101.9820(14)°, V = 3455.40(7) Å3, Z = 4, Dc = 2.002 Mg/m3. In the hexagonal structure of Ag‐hmt unit, each Ag‐hmt unit comprises three Ag atoms and three hmt ligands. The μ3 ‐btc ligands bridge adjacent two‐dimensional honeycomb‐like Ag‐hmt layers to form three‐dimensional networks. Structure analysis show that hydrogen bonds play a key role for the stable structure in the compounds. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Malonato-bridged hexamethylenetetramine coordination polymers containing Mn(II) and Cu(II)

Two malonato-bridged hexamethylenetetramine coordination polymers, M2(hmt)(H2O)2(mal)2 [hmt = hexamethylenetetramine, mal = malonate(2-), M = Mn (1), Cu (2)] were prepared and structurally characterized. The isostructural complexes are orthorhombic, space group Imm2, with a = 7.104(1), b = 15.982(3), c = 7.702(1) Å, Z = 2, D calc = 1.862 g cm−3(1) and a = 6.962(3), b = 15.500(7), c = 7.627(3) Å, Z = 2, D calc = 2.047 g cm−3for 2. The transition metals are octahedrally coordinated by one nitrogen atom of an hmt ligand and five oxygen atoms of a water molecule and three malonate anions. The latter coordinate in chelating/bis-monodentate mode to give 2D layers with a (4, 4) topology, and which are pillared by bridging bidentate hmt ligands to generate an open 3D framework with channels extending in the [001] direction. Over the temperature range 5–300 K, 2 behaves paramagnetically, following the Curie–Weiss law χm(T − θ) = 4.521(6) cm3mol−1K with a Weiss constant θ = −4.8(2) K.

Three-dimensional five-connected coordination polymer [ M2(C 3H 2O 4) 2(H 2O) 2( μ2-hmt)] n with 4 46 6 topologies ( M=Zn, Cu; hmt=hexamethylenetetramine)

Two novel three-dimensional five-connected coordination polymers [ M 2(C 3H 2O 4) 2(H 2O) 2( μ 2-hmt)] n with 4 46 6 topologies ( M=Zn, Cu; hmt=hexamethylenetetramine) were synthesized and characterized by elemental analysis, crystal structure, IR, thermal gravimetric analyses. Both [Zn 2(C 3H 2O 4) 2(H 2O) 2( μ 2-hmt)] n and [Cu 2(C 3H 2O 4) 2(H 2O) 2( μ 2-hmt)] n all crystallize in the orthorhombic system, space group Imm 2 , and with Z = 2 . Metal ions have all octahedral geometry coordinated by four oxygen atoms from three malonates, one oxygen atom from a water molecule and one nitrogen atom of hmt ligand. Each malonate binds a metal ion with its two oxygen atoms in a chelating mode and connects to adjacent two metal ions with another two oxygen atoms to form an infinite wavy layer. The layers are bridged by μ 2-hmt molecules to form a three-dimensional framework with channels. The magnetic susceptibility data show there is a weak antiferromagnetic exchange interaction in the complex [Cu 2(C 3H 2O 4) 2(H 2O) 2( μ 2-hmt)] n .

Synthesis and structure of a three-dimensional coordination polymer [Ag3hmt3(?3-btc)]�5H2O

A new coordination polymer [Ag3hmt3(μ3-btc)]·5H2O (1 )(hmt = hexamethylenetetramine, btc = 1,3,5-benzenetricarboxyl)has been successfully synthesized. Crystal data: P21/a , a = 11.9906(2) A, b = 17.3689(2) A, c = 16.96100(10) A, β = 101.9820(14)°, V = 3455.40(7) A3, Z = 4, Dc = 2.002 mg/m3. In the hexagonal structure of the Ag-hmt unit, each Ag-hmt unit comprises three Ag atoms and three hmt ligands. The μ3-btc ligands bridge the adjacent two-dimensional honeycomb-like Ag-hmt layers to form three-dimensional networks. Structural analysis shows that hydrogen bonds play a key role for the structural stability of the compounds.

Syntheses and Crystal Structure of a New 3D Ag (I)‐Fumaric Acid Framework, [Ag (hmt) (fma)1/2 · 2H2O]n

AbstractA new silver (I) coordination polymer, [Ag(hmt) (fma)1/2 · 2H2O]n (1), (hmt = hexamethylenetetramine, fma = furmaric acid), was obtained by self‐assembly of hmt, fma and AgNO3 in the mixed solvent of methanol, dichloromethane and water (CH3OH:CH2Cl2:H2O = 5:5:1), and characterized by X‐ray diffraction analysis. Complex 1 belongs to orthorhombic space group Pbcn with cell parameters a = 1.72043(5) nm, b=1.19704(2) nm, c = 1.11685(3) nm, V = 2.30007(10) nm3, Z = 8, CCDC number: 194381. In complex 1, each hmt ligand acts as a μ3‐bridge to link three Ag(I) atoms and in turn every Ag(I) ion attaches to three hmt ligands to produce a 2D honeycomb network, which is further linked by the bidentate fma ligands to form a 3D noninterpenetrating open framework with one‐dimensional channels being filled by guest molecules.

Synthesis, Crystal Structure and Magnetic Property of [Mn2(mal)2(H2O)2(µ2-hmt)] n : A Novel Three-Dimensional Network Self-Assembled by hmt (hmt = Hexamethylenetetramine and mal = Malonate)

A novel three-dimensional coordination polymer [Mn2(mal)2(H2O)2(μ2-hmt)] n (hmt = hexamethylenetetramine, and mal = malonate) was synthesized and characterized by elemental analysis, crystal structure, IR, TG-DTA and magnetic susceptibility. The compound [Mn2(mal)2(H2O)2(μ2-hmt)] n crystallizes in the orthorhombic system, space group 12 mm, with a = 7.1059(11), b = 7.6986(6), c = 15.9824(13) Å, and Z = 2. Mn(II) ion has octahedral geometry coordinated by four oxygen atoms from three malonate, one oxygen atom of water and one nitrogen atom of hmt ligand. The two oxygen atoms of each malonate coordinate to the same Mn(II) ion and the other two oxygen atoms connect to two adjacent Mn(II) ions to form an infinite layer. These layers are bridged by the μ2-hmt ligands to form a three-dimensional structure. The magnetic susceptibility data show that there is an antiferromagnetic exchange interaction in the title compound.