Diaquobis-μ-(dimethylsulfoxo)bis(dimethylsulfoxo) dilithium tetraphenylborate

The structure of diaquobis--(dimethylsulfoxo)bis(dimethylsulfoxo)dilithium tetraphenyl- borate, [Li₂(Me₂SO)₄(H₂O)₂][BPh₄]₂, has been determined at 293 K. The compound crystallizes in the triclinic P-1 space group (a = 11.429(2) Å, b = 14.068(3) Å, c = 19.215(4) Å, = 69.31(3), = 88.98(3), = 89.03(3)). The lithium is coordinated to the oxygens of an aquo ligand, a terminal dimethylsulfoxo ligand, and two bridging dimethylsulfoxo ligands. The coordination geometry of each lithium is significantly distorted from a tetrahedron by the twisting of the plane containing the lithium ion and the two bridging dimethylsulfoxo oxygens relative to the plane containing the lithium ion and the terminal dimethylsulfoxo and aquo oxygen atoms. Hydrogen bonding between the aquo hydrogens and the phenyls of the tetraphenylborate anion is observed but does not result in a polymeric structure as has been observed in other lithium tetraphenylborate salts because of the 1:1 ratio of aquo ligands and tetraphenylborate anions.     

μ-(2,2,9,9-tetramethyl-3,7-dithiadecane) decacarbonylditungsten(0)

The title compound crystallizes in the centrosymmetric triclinic unit cell, a = 6.6662(8) Å, b = 8.8584(6) Å, c = 13.574(2) Å, = 71.468(7)°, = 82.182(9)°, = 75.270(7)°, Z = 1. Refinement converged at R = 0.0396 for 1383 observed reflections. The molecule consists of two W(CO)₅ fragments bridged centrosymmetrically by the 2,2,9,9-tetramethyl-3,7-dithiadecane ligand.     

Supramolecular structure of tetrakis-μ-(4-chloro-3-nitrobenzoato)-bis(methanol)dicopper(II)

The title compound, [Cu₂(II)(4-Cl-3-NO₂–C₆H₃CO₂)₄(CH₃OH)₂] or [Cu₂(4-chloro-3-nitrobenzoate)₄(MeOH)₂] has been prepared and its structure determined using X-ray crystallography. The complex crystallizes in the triclinic space group P-1 with a = 9.6887(9)Å, b = 10.6448(9)Å, c = 11.4194(10)Å, = 108.094(2), = 110.682(2), = 105.055(2), V = 952.691(15)ų, and Z = 1. The structure consists of centrosymmetric dimers in which the Cu(II) atoms display a square pyramidal CuO₅ coordination, with four carboxylate O atoms in the basal plane [CuO 1.951(2)–1.968(2)Å] and the methanol O atoms in the apical position [CuO 2.170(2)Å]. The Cu atoms are 2.614(1)Å apart and are bridged by four benzoate groups. The discrete dimers are extended into 1D chains that result from hydrogen bonding between the coordinated methanol on one Cu(II) dimer and the nitro substituent on an adjacent Cu(II) dimer. The chains are interdigited and held by – stacking interactions forming 3D supramolecular array.     

Regiospecific CO substitution in (μ-H)Ru3(μ3− η3-CHCHCMe)(CO)9 by 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione(bpcd). X-ray structure of (μ-H)Ru3(μ3−η3-CHCHCMe)(CO)7(bpcd)⋅MeOH

The triruthenium cluster ( -H)Ru₃( ₃–³-CHCHCMe)(CO)₉ reacts with the diphosphine ligand 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd) in the presence of Me₃NO to afford ( -H)Ru₃( ₃– ³-CHCHCMe)(CO)₇(bpcd) in moderate yield. This new cluster has been isolated and characterized in solution by IR and NMR (¹H, ³¹P) spectroscopies, and the solid-state structure has been established by X-ray crystallography. ( -H)Ru₃( ₃– ³-CHCHCMe)(CO)₇(bpcd) MeOH crystallizes in the triclinic space group P , a = 11.2426(8) Å, b = 11.7141(8) Å, c = 16.195(1) Å, = 102.041(5)°, = 95.128(5)°, = 102.553(6)°, V = 2008.4(3) ų, Z = 2, d _calc. = 1.733 g/cm³; R = 0.0488, R _w = 0.0546 for 2212 observed reflections with I > 3 (I). The X-ray structure reveals that the bpcd ligand is bound exclusively to the Ru₃ core at the ruthenium center coordinated by the terminal CH unit of the -allylic ₃– ³-CHCHCMe moiety.     

The properties,crystal, and molecular structure of catena-[(μ-acetato-) (μ-phthalazine)silver(I)dihydrate]: {[Ag(μ-O2CCH3) (μ-PHZ) (H2O)2]2}n

The crystal and molecular structure of catena-[(-acetato) (-phthalazine)-silver(I)dihydrate], {[Ag(O₂CCH₃) (C₈H₆N₂)(H₂O)₂]₂}_n, has been determined by single crystal X-ray analysis: the space group is P2₁/n,a=16.150(8) Å,b=3.886(5) Å,c=18.716(9) Å, =96.02(5)°,V=1168 ų. Phthalazine (PHZ) bridges the silver atoms to form {Ag--PHZ]₂ dimeric subunits. These dimeric subunits are planar and stack by bridging acetates to form a polymeric lattice. The acetates also form an asymrnetric chelate ring with the silver atoms which result in a distorted, square pyramidal configuration. The complex is further characterized by its IR and thermal properties.     

Structure,bonding, and magnetic behavior of bis(μ-chloro)-and (μ-bromo)-bridged Cu(II) dimers

It has been previously reported that dimeric compounds of the general formula [L₃Cu(II)]₂(-Cl)₂ exhibit a correlation between their magnetic coupling constantJ and the bridging Cu-Cl-Cu angle. A full survey of the published structural and magnetic data on these compounds confirms this correlation but leads to the conclusion that its physical significance is questionable. EHMO calculations on Cu₂Cl ₈ ^4– and its bromo analog show that the molecular orbitals responsible for the magnetic behavior of the dimers are not the orbitals responsible for the bonding interactions in these dimers. Therefore, they are very weakly affected by variations of the molecular structure, and no significant correlation betweenJ and any of the structural parameters is theoretically predicted. However, this situation changes when the coordination around the Cu atoms is strongly and dissymmetrically pyramidalized.     

Synthesis and X-ray structure of [(μ-H)Ru3(CO)8(μ-Cl)(μ-dppm)] [dppm = bis(diphenylphosphino)methane]

The reaction of [Ru₃(CO)₁₀(-dppm)] 1 with PPhCl₂ in refluxing CHCl₃ results in the isolation of [(-H)Ru₃(CO)₈(-Cl)(-dppm)] 3 in 10% yield. Compound 3, which has been structurally characterized by crystallographic methods, is also formed from the reaction of 1 with H₂ in refluxing CCl₄. The compound crystallizes in the monoclinic space group P2₁/c with a = 16.814(2), b = 18.7590(12), c = 11.486(2) Å, = 97.745(11)°, V = 3589.8(8) ų, and Z = 4. The hydride and chloride ligands bridge the same edge of the triruthenium cluster as the dppm ligand.     

Bridging and chelating diphosphine ligands in Ru3(μ-H)(μ-N=CPh2)(CO)8(P—P). X-ray diffraction structures of Ru3(μ-H)(μ-N=CPh2)(CO)8(dmpe) and Ru3(μ-H)(μ-N=CPh2)(CO)8(bpcd)

Treatment of the azavinylidene-bridged cluster Ru₃(-H)(-N=CPh₂)(CO)₁₀ (1) with the diphosphine ligand bis(dimethylphosphino)ethane (dmpe) gives Ru₃( -H)(-N=CPh₂)(CO)₈(dmpe) (2) in moderate yield, while the ligand 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd) reacts with Ru₃( -H)(-N=CPh₂)(CO)₁₀ in the presence of Me₃NO to furnish Ru₃( -H)(-N=CPh₂)(CO)₈(bpcd) (3) in low yield. Each new cluster has been isolated and characterized in solution by IR and NMR (¹H and ³¹P) spectroscopies, and the coordination mode exhibited by the ancillary diphosphine ligand in 2 and 3 has been established by X-ray crystallography. Ru₃( -H)(-N=CPh₂)(CO)₈(dmpe) crystallizes in the monoclinic space group P2(1)/c, a = 10.791(1) Å, b = 16.377(1) Å, c = 18.148(1) Å, = 96.675(2)°, V = 3185.3(4) ų, Z = 4, D _cacl = 1.791 Mg/m³; R = 0.0360, R _w = 0.0866 for 7522 observed reflections with I > 2(I). Ru₃(-H)(-N=CPh₂)(CO)₈(bpcd) crystallizes, as the CH₂Cl₂ solvate, in the triclinic space group , a = 11.956(1) Å, b = 14.228(1) Å, c = 31.409(3) Å, = 89.377(2)°, = 79.344(2)°, = 77.235(2)°, V = 5118.4(8) ų, Z = 2, D _calc = 1.670 Mg/m³; R = 0.0557, R _w = 0.1069 for 10977 observed reflections with I > 2(I). The structural details of clusters 2 and 3 are contrasted with Ru₃(-H)(-N=CPh₂)(CO)₇(-dppm)(-dppm), which is the only known structurally characterized phosphine-substituted cluster of this genre.     

Synthesis and X-ray structure of tetrakis[μ-(3,4-dimethoxy-α-β-dihydrocinnamato)] dimethanoldicopper(II)

The synthesis, magnetic, and structural properties of the title compound are reported. The crystals are triclinic, space groupP¯1, witha=15.084(2),b=11.820(1),c=7.5253(7) Å, =71.50(1),=77.61(1), =68.68(1)° andZ=1; the structure was solved by Patterson and Fourier methods and refined toR 0.0351 for 4147 observed reflections. The content of the unit cell consists of a centrosymmetrical copper acetate-like molecule in which each copper can be described as square-pyramidally surrounded by four carboxylic oxygens in the basal plane [1.955(2)–1.970(2) Å], one methanolic oxygen in the apical site [2.206(2) Å] and a CuCu interaction of 2.612(5) Å at a sixth position of a distorted octahedron. The dimers are packed by means of hydrogen bonds formed between the methanolic OH group and the carboxylic O(2) atom of one adjacent complex and by normal Van der Waals contacts. The subnormal magnetic moment, characteristic of exchange interactions between the two copper(II) ions, and the energy of the d-d band observed are consistent with the reported dinuclear copper(II) acetate-like structure.     

Synthesis and crystallographic characterization of [Cd(OH2)2 (μ-Br)4 (Cd(2-hydroxyethyl sulfide) (μ-Br))2]n

The reaction of equal millimolar quantities of CdBr₂ and 2-hydroxyethyl sulfide in 31 CH₃CNCH₃OH produced [Cd(OH₂)₂(Br)₄ (Cd(2-hydroxy ethyl sulfide) (-Br))₂]_n. The compound crystallizes as a bromide-bridged polymer with hydrogen bonding interactions between the polymeric chains. Each of the two unique metal centers has a distorted octahedral geometry. The thioether ligand is bidentate to one cadmium position with one alcoholic terminus uncoordinated. The uncoordinated portion of the molecule is disordered with each conformation participating in slightly different hydrogen bonding environments. The other unique cadmium center is coordinated to four bridging bromides and twotrans water molecules.     

Crystal structure of (3-aminopropionato)bis(ethylenediamine)cobalt(III) catena-di(μ-chloro)dichloroplumbate(II) monohydrate

Crystals of [Co(C₂H₈N₂)₂(C₃H₆NO₂)]PbCl₄ · H₂O [a = 7.627(1) Å, b = 11.238(1) Å, c = 11.444(1) Å, α = 99.125(1)°, β = 103.80(1)°, γ = 94.739(1)°, V = 933.09(1) ų, Z = 2, and space group $P\bar 1$ ] contain the octahedral PbCl₆ groups that share edges to form infinite [Cl₂Pb(μ-Cl)₂] _n ²ⁿ chains, in which the terminal Cl atoms occupy the cis positions. The Pb-Cl bond lengths are 2.763(1)–3.180(3) Å. In the discrete cationic complexes, the Co atom is coordinated by two ethylenediamine molecules and the 3-aminopropionate anion. In the enantiomeric complex with the Δ absolute configuration, the ethylenediamine rings have the λ and δ configurations and the aminopropionate ring has the λ configuration.     

Alkyne insertion and coupling reactions of methyl propiolate with the heterometallic dimers CoRu(CO)7(μ-PPh2) and CoRu(CO)5[(Z)-Ph2PCH = CHPPh2](μ-PPh2): X-ray diffraction structures of CoRu(CO)4(μ-CO)[μ-PPh2C(O)CH(CCO2Me)C(O)CHC (CO2Me)] and CoRu(CO)3(μ-CO)[(Z)-Ph2PCH = CHPPh2][μ-PPh2C(O)C(CO2Me)CH]

The reaction of the terminal alkyne methyl propiolate with the heterometallic dimers CoRu(CO)₇(μ-PPh₂) (1) and CoRu(CO)₅[(Z)-Ph₂PCH=CHPPh₂](μ-PPh₂) (2) has been investigated at 65^°C in toluene. In the reaction of 1, chromatographic purification afforded a minor band, from which the two species RuCo(CO)₄(μ-CO)[μ-PPh₂C(O)CHC(CO₂Me)] and RuCo(CO)₄(μ-CO)[μ-PPh₂CHC(CO₂Me)] were observed by ¹H NMR spectroscopy, and one major band, whose ¹H NMR spectrum revealed the presence of multiple species. The identity of one of the compounds in the major component has been established as that of CoRu(CO)₄(μ-CO)[μ-PPh₂C(O)CH(CCO₂Me)C(O)CHC(CO₂Me)] (3) by X-ray diffraction analysis. The solid-state structure of 3 confirms the double insertion of CO and head-to-head coupling of the methyl propiolate that accompanies the formation of this product. Compound 3 crystallizes in the triclinic space group P-1, a = 8.4035(4), b = 9.6721(5), c = 17.678(1) Å, α = 94.135(2), β = 103.318(2), γ = 101.336(2)^°, V = 1360.5(1) ų, Z = 2, D _calc = 1.732 Mg/m³; R = 0.0300, R _w = 0.0760 for 8630 reflections with I > 2σ(I). The ruthenium-bound diphosphine ligand in 2 exerts a controlling influence on the reaction with added alkyne insomuch as only the mono-insertion product CoRu(CO)₃(μ-CO)[(Z)-Ph₂PCH=CHPPh₂][μ-PPh₂C(O)C(CO₂Me)CH] (4) is formed as a single regioisomer. The molecular structure of 4 was established by X-ray diffraction analysis and 4 was found to crystallize in the monoclinic space group P2₁/c, a = 19.483(7), b = 11.905(4), c = 20.131(7) Å, β = 110.455(6)^°, V = 4375(3) ų, Z = 4, D _calc = 1.466 Mg/m³; R = 0.0961, R _w = 0.1683 for 6262 reflections with I > 2σ(I). The reactivity of methyl propiolate with 1 and 2 is compared with the known reactivity that has been reported for other alkynes.     

Synthesis and X-ray structure of [(μ-H)Os3(CO)10(μ-η2-N=CCH=CHCH=CC2H5)]

The reaction of [Os₃(CO)₁₀(MeCN)₂] with 2-ethylpyridine at ambient temperature leads to the isolation of the cluster [(-H)Os₃(CO)₁₀(-²-N=CCH=CHCH=CC₂H₅)][3 (65% yield) which has been structurally characterized by crystallographic methods. The compound crystallizes in the triclinic space group with a = 9.334(2), b = 9.918(2), c = 11.767(1) Å, = 92.13(2), = 99.93(1), = 99.88(2)°, V = 1054.7(3) ų and Z = 2. The same edge of the osmium triangle in the cluster is bridged by both the hydrido and the heterocyclic ligands, the latter through the nitrogen and the carbon atoms of the C=N bond.     

Synthesis and crystal structure of the two-dimensional coordination polymer catena(bis(μ3-iodo)-(μ 2-pyrazine)-di-copper(I))

The two-dimensional coordination polymer [Cu₂ i ₂(pyz)]_n (where pyz = pyrazine) has been synthesized hydrothermally and structurally characterized by single crystal X-ray diffraction analysis. [Cu₂ i ₂(pyz)]_n crystallizes in the space group P with a = 4.1759(4) Å, b = 7.1281(7) Å, c = 8.1279(8) Å, = 109.607(2), = 101.769(2), = 96.676(2), and Z = 1. The sheet-like polymer is characterized by infinite stair step [Cu₂ i ₂]_n double chains connected in two dimensions through bridging pyrazine ligands. The coordination environment about each copper is approximately tetrahedral having three Cu–I bonds and a single Cu–N bond.     

Reaction of ethyl diazoacetate with Co3(CO)9(μ3-CCl): Isolation and X-ray structures of Co3(CO)9(μ3-CCO2Et), Co3(CO)9(μ3-CCH2CO2Et), and [Co3(CO)9(μ3-CCHCO2Et)]2

The reaction between the tricobalt cluster Co₃(CO)₉(₃-CCl) (1) and AlCl₃, followed by treatment with ethyl diazoacetate, N₂CHCO₂Et, affords a complex mixture of products in low yields. Column chromatography has allowed the isolation of the four cluster compounds Co₃(CO)₉(₃-CH) (2), Co₃(CO)₉(₃-CCO₂Et) (3), Co₃(CO)₉(₃-CCH₂CO₂Et) (4), and [Co₃(CO)₉(₃-CCHCO₂Et)]₂ (5). Clusters 4 and 5 are new and have been fully characterized in solution by IR and ¹H NMR spectroscopy. The molecular structures of clusters 3–5 have also been determined by single-crystal X-ray diffraction analysis. Co₃(CO)₉(₃-CCO₂Et) crystallizes in the triclinic space group P , a = 8.8393(5), b = 14.727(1), c = 15.272(1) Å, = 93.361(6), = 105.509(5)°, = 100.336(6)°, V = 1872.6(2) ų, Z = 4, and d _calc = 1.823 g/cm³. Co₃(CO)₉(₃-CCH₂CO₂Et) crystallizes in the monoclinic space group P2₁/n, a = 9.3806(7), b = 9.2617(8), c = 22.455(2) Å, = 94.483(7)°, V = 1944.9(3) ų, Z = 4, and d _calc = 1.803 g/cm³. [Co₃(CO)₉(₃-CCHCO₂Et)]₂ crystallizes in the monoclinic space group C2/c, a = 21.585(2), b = 8.7977(7), c = 20.784(1) Å, = 104.807(6)°, V = 3815.8(5) ų, Z = 4, and d _calc = 1.835 g/cm³. Plausible pathways leading to the formation of clusters 2, 4, and 5 are discussed.     

Synthesis, spectroscopy, and X-ray structure of the polymer catena-[bis(azido-N)-copper(II)-μ-bis(2-benzimidazolyl)butane]

The title compound, catena-[bis(azido-N)-copper(II)-(bis(2-benzimidazolyl)butane), [Cu(C₁₈H₁₈N₄)(N₃)₂]_n, was obtained from the reaction of the ligand bis(2-benzimidazolyl)butane and Cu(N₃)₂. The x-ray crystal structure is reported. The compound crystallizes in the monoclinic space group P2₁/c with a = 8.2524(10), b = 12.765(5), c = 9.1125(15) Å, = 106.423(12)°, Z = 2. The Cu(II) ions are square-planar coordinated with trans-oriented end-on binding azido ligands. The structure is a polynuclear chain with the benzimidazole bridging at each end. In addition a N_(ligand)-H···N_(azido) H-bridge [N_(ligand)···N_(azido) = 2.994(7) Å] is present, resulting in a pseudo 2-dimensional lattice. The characteristic azido infrared vibrations are found at 2060 and 2077 cm^–1 (_as(N₃)) and 1284 and 1297 cm^–1 ((N₃)).     

Synthesis and structural analysis of (μ-SCH2CH2CH2S-μ)Fe2(CO)5(2-C5H4NPPh2)

Treatment of (μ-SCH₂CH₂CH₂S-μ)Fe₂(CO)₆ with equimolar 2-C₅H₄NPPh₂ in the presence of Me₃NO·2H₂O in CH₂Cl₂/MeCN solutions gave the title complex (μ-SCH₂CH₂CH₂S-μ)Fe₂(CO)₅(2-C₅H₄NPPh₂) in 76% yield. The title complex was characterized by spectroscopy as well as by single crystal X-ray diffraction analysis. The molecular structure consists of a butterfly [Fe₂S₂] cluster with propane, five carbonyls, and 2-C₅H₄NPPh₂. In the crystal packing diagram, intermolecular C–H···O hydrogen bonds between phenyl and carbonyl groups stabilize the solid state.     

Chelation of a diphosphine ligand at FeCo2(CO)9(μ3-S): Spectroscopic and X-ray diffraction data for FeCo2(CO)7(bpcd)(μ3-S)

The tetrahedrane cluster, FeCo₂(CO)₉(₃-S), reacts with the redox-active ligand, 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd), to give the disubstituted cluster, FeCo₂(CO)₇(bpcd)(₃-S), as the sole product. This diphosphine-substituted cluster contains a cobalt-bound, chelating bpcd ligand. Both IR and ³¹P NMR spectroscopies have been employed in the solution characterization of FeCo₂(CO)₇(bpcd)(₃-S), and the solid-state structure has been unequivocally established by X-ray diffraction analysis. FeCo₂(CO)₇(bpcd)(₃-S) crystallizes in the monoclinic space group C2/c, a = 34.494(3) Å, b = 11.4194(9) Å, c = 18.634(2) Å, = 98.103(7)°, V = 7266.7(9) ų, Z = 8, and d_calc = 1.584 g/cm³. Cyclic voltammetric studies on FeCo₂(CO)₇(bpcd)(₃-S) reveal the presence of two quasireversible redox responses assigned to the 0/1^– and 1^–/2^– redox couples. The orbital composition of these redox couples has been examined by carrying out extended Hückel MO calculations on the model complex FeCo₂(CO)₇(H₄-bpcd)(₃-S), with the results being compared to related cluster compounds.     

PhPMe2 ligand substitution in the tetracobalt cluster Co4(CO)10(μ4-PPh)2: X-ray diffraction structure of Co4(CO)8(PPhMe2)2(μ4-PPh)2

The thermal substitution chemistry of the tetracobalt cluster Co₄(CO)₁₀(₄-PPh)₂ with the phosphine ligand PhPMe₂ (2.5 equiv) has been explored and found to afford the bis(phosphine)-substituted cluster Co₄(CO)₈(PPhMe₂)₂(₄-PPh)₂ as the major reaction product. The regiochemistry and stereoselectivity exhibited by the two phosphine ligands in Co₄(CO)₈(PPhMe₂)₂(₄-PPh)₂ have been unambiguously established by X-diffraction analysis as having a 1,3-cis orientation. Co₄(CO)₈(PPhMe₂)₂(₄-PPh)₂ crystallizes in the monoclinic space group P2₁/n,a=10.314(1) Å,b=18.051(3) Å,c=21.313(2) Å, =90.10(1)°,V=3968.0(8) ų,Z=4,d _calc=1.590 g cm^–3;R=0.051,R _w=0.042 for 4987 observed reflections withI>3(I). Generalizations concerning the stereochemical disposition of two P-ligands about the Co₄(CO)₈P₂(₄-PPh)₂ (where P=phosphine or phosphite) polyhedron are discussed with respect to the cone angle of the P-ligand and its steric interactions with the capping phenylphosphinidene group.     

Crystal structures and properties of catena-μ-nitrato (7-amino-5-aza-4-methyl-3-hepten-2-onato) copper(II) and μ3-hydrox-otris(μ-8-amino-5-aza-4-methyl-3-octen-2-onato) tricopper(II) dinitrate

The products of monocondensation of penta-2,4,-dione with 1,2-diaminoethane, HAE, and with 1,3-diaminopropane, HAT, react with copper nitrate hemipentahydrate to give catena--nitrato (7-amino-5-aza-4-methyl-3-hepten-2-onato) copper(II), [Cu(AE)NO₃]_n and a mixture of ₃-hydroxo-tris (-8-amino-5-aza-4-methyl-3-octen-2-onato) tricopper(II) dinitrate [Cu₃(AT)₃OH]-(NO₃)₂ and [Cu(AT)NO₃]_x, respectively. The structure of [Cu(AE)NO₃]_n has been determined from 1601 diffractometer data and refined by least squares methods toR=0.0306. The compound crystallizes in the monoclinic space groupP2₁/a witha=16.856(3)Å,b=8.109(4)Å,c=7.518(3)Å,=90.15(2)°,D _c =1.725 g cm^–3,D _o=1.72 g cm^–3 andZ=4. Copper atoms in [Cu(AE)NO₃]_n are in a 4+1+1^* environment and are linked by the pseudobidentate and bridging nitrato group into infinite chains. The structure of [Cu₃(AT)₃OH](NO₃)₂ has been determined from 3178 diffractometer data and refined toR=0.0544. The compound crystallizes in the triclinic space groupP¯1 witha=11.918(2)Å,b=14.478(2)Å,c=11.501(3)Å,=98.04(2)°,=117.72(2)°, =99.80(1)°,D _c =1.580 g cm^–3,D _o=1.59 g cm^–3 andZ=2. The compound is associated in hexanuclear clusters due to hydrogen bonding interactions. Coordination about Cu is best described as square pyramidal. Magnetic susceptibility data indicate a weak antiferromagnetic exchange within the trinuclear core withJ=–14 cm^–1.