共查询到20条相似文献,搜索用时 190 毫秒
1.
Abstract The molecular and crystal structure of a 1:1 co-crystal of 4,4′-dimethyl-7,7′-bi([1,2,5]thiadiazolo[3,4-b]pyridylidene)–chloranilic acid, (1), has been determined by X-ray diffraction at the monoclinic space group P21/c with cell parameters of a = 8.422(6), b = 7.343(4), c = 16.112(7) ?, β = 104.988(8)°, V = 962.5(10) ?3 and Z = 2. In the crystal structure, two components connect via the intermolecular O–H···N hydrogen bonds [2.804(4) ?] and S···O
heteroatom interaction [2.945(3) ?] with R
2
2(7) couplings to form a unique and infinite one-dimensional supramolecular tape structure. The calculations of (1) at the HF/6-31G(d), MP2/6-31G(d), and B3LYP/6-31G(d) levels can almost reproduce X-ray geometry. In addition, the distances
of the intermolecular O–H···N and S···O interactions by MP2/6-31G(d) and B3LYP/6-31G(d) levels agree well with those in the
crystal. The calculated binding energies corrected BSSE and ZPE are −4.487 (HF), −7.473 (MP2), and −5.640 (B3LYP) kcal/mol.
The results suggest that the complex (1) is very stable and the dispersion interaction is significantly important for the attractive intermolecular interaction in
(1). The NBO analysis has revealed that the n(N) → σ*(O–H) interaction gives the strongest stabilization to the system and the major interaction for the intermolecular
S···O contact is n(O) → σ*(S–N).
Index Abstract In the crystal structure of the title compound, the molecules are linked by intermolecular O–H···N hydrogen bonds and short
S···O heteroatom interactions with R
2
2(7) couplings to construct a unique and infinite one-dimensional supramolecular tape structure.
相似文献
2.
Guo-Cheng Liu Yong-Qiang Chen Wen-Yan Zheng Hong-Yan Lin 《Transition Metal Chemistry》2009,34(7):739-744
A novel organic–inorganic hybrid compound [Cu(2,2′-bipy)(C6H5NO2)(H2O)]2[Mo8O26]·5H2O (1), (2,2′-bipy = 2,2′-bipyridine; C6H5NO2 = pyridine-4-carboxylic acid) has been prepared and characterized by elemental analyses, IR spectrum, thermal stability analysis,
and single-crystal X-ray diffraction. Compound 1 is a discrete cluster, constructed from β-[Mo8O26]4− subunits covalently bonded to two [Cu(2,2′- bipy)(C6H5NO2)(H2O)]24+ coordination cations via terminal oxo groups that connect one molybdenum site. A 3D supramolecular network is further formed
by extensive hydrogen bonding interactions and π–π interactions of the 2,2′-bipy and pyridine-4-carboxylic acid ligands. EPR
and magnetic susceptibility studies have been used to elucidate the electronic properties of the Cu2+ centres, and the results are in good agreement with the structural features of the compound. 相似文献
3.
Fa-Nian Shi Mário S. Reis Paula Brandão A. M. Souza Vitor Félix João Rocha 《Transition Metal Chemistry》2010,35(7):779-786
Two new Mn(II) coordination polymers formed with molecular formula [Mn(H2O)2(HBTC)·(H2O)] 1 and [Mn(H2O)2(4,4′bipy)(HBTC)2]·(H4,4′bipy)2
2, where BTC = 1,2,4-benzenetricarboxylate and 4,4′bipy = 4,4′bipydine, have been synthesized via hydrothermal approach and
characterized by single crystal X-ray diffraction techniques. 1 is composed of Mn–H2O–Mn 1D chains and further the chains are linked by HBTC ligands to form a 2D network in the ab plane; 2 is constructed by Mn–4,4′bipy–Mn 1D chains along the b direction with Mn2+ ions coordinated to H2BTC and water as terminal ligands to form a 2D network. We also prepared a third compound with the molecular formula of [Mn(H2O)(HBTC)·(H2O)] which has been recently structurally reported elsewhere. The magnetic properties of the three compounds have been studied
in detail under variable temperatures. 相似文献
4.
Wen-Kui Dong Li Li Yin-Xia Sun Jun-Feng Tong Jian-Chao Wu 《Transition Metal Chemistry》2010,35(7):787-794
Two CoII complexes, namely {[CoL(MeOH)(μ-OAc)]2Co}·2MeCN·2MeOH (1) and {[CoL(EtOH)(μ-OAc)]2Co}·3EtOH (2) (H2L=3,3′-dimethoxy-2,2′-[(1,3-propylene)dioxybis(nitrilomethylidyne)]diphenol), have been synthesized and characterized by X-ray
crystallography. Both complexes contain octahedral coordination geometries, comprising three CoII atoms, two deprotonated bisoxime L2− units in which four μ-phenoxo oxygen atoms form two [CoL(X)] (X = MeOH or EtOH) units, two acetate ligands coordinated to
three CoII centers through Co–O–C–O–Co bridges, and coordinated and non-coordinated solvent. Both complexes exhibit 2D supramolecular
networks through different intermolecular hydrogen-bonding interactions. 相似文献
5.
Ying Liu Shuxia Liu Hongmei Ji Shiwei Zhang Lili Cai Ruige Cao 《Journal of Cluster Science》2009,20(3):535-543
Abstract Two organic–inorganic hybrid compounds based on the Anderson-type clusters [TeMo6O24]6−, [(H2O)2Co(TeMo6O24)][(C10N2H10)2] · 9.5H2O (1), [(C10N2H9)Ni(H2O)3]2[TeMo6O24] · 8.5H2O (2), have been synthesized by hydrothermal reactions and characterized by elemental analyses, IR spectra, thermal stability analyses,
and single-crystal X-ray diffraction. Compound 1 displays a 1D chain structure constructed from alternating [TeMo6O24]6−clusters and Co2+ along the a axis with two pendant ligands 4,4′-bpy (4,4′-bipyridine). Compound 2 is composed of [TeMo6O24]6− clusters coordinated by [Ni(bpy)(H2O)3]2+ moieties, and a supramolecular architecture is further formed through extensive hydrogen bonds interactions.
Graphical Abstract Two organic–inorganic hybrid compounds based on the Anderson-type clusters [TeMo6O24]6−and the unit [M(4,4′-bpy)] have been synthesized under the hydrothermal conditions. Compound 1 displays a 1D chain structure constructed covalently from alternating polyoxoanions [TeMo6O24]6− and Co2+ along the a axis with two pendant ligands 4,4′-bipyridine. Compound 2 is composed of [TeMo6O24]6− polyoxoanion coordinated by [Ni(bpy)(H2O)3]2+ moieties and shows a 1D chain structure through the hydrogen bonds interactions.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
6.
Zhao-Yang Wang Jing-Huo Chen Ling-Fei Zhao Wen-Hua Zhang Guang Yang 《Transition Metal Chemistry》2011,36(7):731-737
Two semi-rigid bipyrazolyl ligands, namely 2,3,5,6-tetramethyl-1,4-bis[(3′,5′-dimethyl-1H -pyrazol-4′-yl)methylene]benzene (H2L) and 2,3,5,6-tetramethyl-1,4-bis[(3′,5′-diphenyl-1H -pyrazol-4′-yl)methylene]benzene (H2L′), and their Ag(I) and Cu(II) complexes have been prepared and structurally characterized by means of X-ray analysis. In
the structures of the metal complexes, namely [Ag2(H2L)2](BF4)2·2H2O (1), [Ag(H2L)(NO3)]n (2), [Cu2(H2L)4(SO4)2]·11H2O (3), and {[Ag(H2L′)]BF4}n (4), the bipyrazoles act as bridging ligands to connect two metal atoms. Complexes 2 and 4 exhibit 1-D polymeric structures, while 1 and 3 are discrete molecules with a rectangular dimer or tetragonal prismatic shapes, respectively. Two different conformations,
namely cis and trans, have been observed for these bipyrazolyl ligands. 相似文献
7.
Zhi Qiang Shi Ning Ning Ji Ren Gao Zhao Ji Kun Li Zhi Feng Li 《Structural chemistry》2011,22(1):225-233
Two new copper(II) complexes, [Cu(p-FBA)2(2,2′-bpy)]·(H2O) (1) and [Cu(p-FBA)(2,2′-bpy)2]·(p-FBA)2 (2) {p-FBA = p-fluorobenzoic acid, 2,2′-bpy = 2,2′-bipyridine} have been obtained from an identical starting mixture using temperature as
the only independent variable and characterized by X-ray single crystal diffraction as well as with infrared spectroscopy,
elemental analysis, and thermogravimetric analysis. The results reveal that 1 has 1D infinite chain structure formed by O–H···O hydrogen bonds, while 2 features a 0D structure. Additionally, there exist C–H···O hydrogen bonds and π–π stacking interactions in 1, forming 2D supramolecular structure. Furthermore, density functional theory (DFT) calculations of the structures, stabilities,
orbital energies, composition characteristics of some frontier molecular orbitals and Mulliken charge distributions of the
[Cu(p-FBA)2(2,2′-bpy)] of 1 and [Cu(p-FBA)(2,2′-bpy)2]+ cation of 2 were performed by means of Gaussian 03W package and taking B3LYP/lanl2dz basis set. 相似文献
8.
Wen-Kui Dong Jun-Feng Tong Yin-Xia Sun Jian-Chao Wu Jian Yao Shang-Sheng Gong 《Transition Metal Chemistry》2010,35(4):419-426
Two new mono- and dinuclear Cu(II) complexes, namely [CuL1]·0.5H2O (1) and [(Cu2(L2)2)(DMF)]·0.5DMF (2) (H2L1 = 1,2-bis{[(Z)-(3-methyl-5-oxo-1-phenyl-1H-pyrazolidin-4(4H)-yl)(phenyl)]methylene-aminooxy}ethane; H2L2 = 1,3-bis{[(Z)-(3-methyl-5-oxo-1-phenyl-1H-pyrazolidin-4(4H)-yl)(phenyl)] methyleneaminooxy}propane), have been synthesized and characterized by X-ray crystallography. The unit cell
of complex 1 contains two crystallographically independent but chemically identical [CuL1] molecules and one crystalline water molecule, showing a slightly distorted square-planar coordination geometry and forming
a wave-like pattern running along the a-axis via hydrogen bonding and π···π stacking interactions. Complex 2 has a dinuclear structure, comprising two Cu(II) atoms, two completely deprotonated phenolate bisoxime (L2)2− moieties (in the form of enol), and both coordinated and hemi-crystalline DMF molecules. Complex 2 has square-planar and square-pyramidal geometries around the two copper centers, whose basic coordination planes are almost
perpendicular and form an infinite three-dimensional supramolecular network structure involving intermolecular C–H···N, C–H···O,
and C–H···π(Ph) hydrogen bonding and π···π stacking interactions of neighboring pyrazole rings. 相似文献
9.
Xiu-Jun Deng Wen Gu Xiu-Ping Sun Li Wang Ling-Fei Zeng Mei-Ling Liu Yue-Qiang Gao Xin Liu 《Transition Metal Chemistry》2009,34(6):663-668
Two copper complexes, [Cu(bpca)(4,4′-bpyH)(H2O)(ClO4)]ClO4·H2O (1) and [Cu4(bpca)4(mpba)]·3H2O (2) [bpca = N-2-pyridinylcarbonyl-2-pyridine-carboximidate; mpba = 1,3-phenylenebis(oxamate)] were synthesized and characterized by physico-chemical
and spectroscopic techniques. Complex 1 crystallizes in the Triclinic P-1 space group while complex 2 is in the Monoclinic space group C2/c. Bpca acts as a tridentate ligand through its three nitrogen atoms in these species. They exhibit 2D supramolecular architectures
through hydrogen bonds and short-distance intermolecular interactions. Magnetic measurements in the range 2–300 K have shown
weak antiferromagnetic interactions between the adjacent copper ions in complex 2.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
10.
Jin-Zhong Gu Dong-Yu Lv Zhu-Qing Gao Jian-Zhao Liu Wei Dou 《Transition Metal Chemistry》2011,36(1):53-58
Three Co(II) and Ni(II) complexes, namely [Co(bpdc)(H2O)2] (1), [Ni(bpdc)(H2O)2] (2), and [Co2(bpdc)2(prz)0.5(H2O)3]·0.5H2O (3) (H2bpdc = 2,2′-bipyridine-6,6′-dicarboxylic acid and prz = piperazine), have been synthesized from H2bpdc and the corresponding metal salts under hydrothermal conditions. The complexes were characterized by physico-chemical
and spectroscopic methods, as well as by X-ray crystallography. Compounds 1 and 2 both consist of neutral mononuclear molecules, of [Co(bpdc)(H2O)2] and [Ni(bpdc)(H2O)2], respectively. Compound 3 consists of a mononuclear molecule of [Co(bpdc)(H2O)2] and a binuclear molecule of [Co2(bpdc)2prz (H2O)2]. The discrete neutral complexes 1–3 further extend their structures into three-dimensional supramolecular architectures by intermolecular O–H⋯O and C–H⋯O hydrogen
bonds as well as π–π stacking interactions. Magnetic susceptibility measurements show that complex 3 exhibits weak ferromagnetic interactions between the two Co(II) ions bridged by the prz ligand, with C = 5.41 cm3 mol−1 K and θ = +27.6 K, respectively. 相似文献
11.
Rafal Kruszynski 《Structural chemistry》2010,21(1):87-97
The coordiantion compounds [Zn(C10H8N2)(Cl2HCCOO)(H2O)3]−·[Zn(C10H8N2)(Cl2HCCOO)3]+ and [Cd(C10H8N2)2(Cl2CHCOO)2] were synthesised and characterised by elemental and thermal analysis, IR and UV–VIS spectroscopy, and X-ray crystallography.
The complexes are air stable and well-soluble in water. The zinc atoms are five and six coordinated and the cadmium atom is
six coordinated. The coordination polyhedra of central atoms can be described as trapezoidal pyramid and octahedron in zinc
compound and as rectangular bipyramid strongly distorted towards skew trapezoidal bipyramid in cadmium compound. In both compounds
all dichloroacetate groups are monodentate. The bond valences considerations show that all 2,2′-bipyridine molecules are bonded
almost 2 times stronger than carboxylate groups. In the structure of zinc compound exist O–H···O hydrogen bonds and in both
structures can be found weak C–H···O hydrogen bonds. Additionally, both compounds are pile-stacked by π···π interactions.
The IR spectra show typical vibrations for chelating 2,2′-bipyridine molecules and terminal monodentate carboxylate groups.
The thermal decomposition studies show zinc compound decomposes in 4 steps and cadmium compound decomposes in 5 steps with
formation of oxides as a final products. The ligands decompose gradually, first dichloroacetates and next 2,2′-bipyridine. 相似文献
12.
Xin-Xin Xu Xia Zhang Xiao-Xia Liu Ting Sun Yu-Hong Wang 《Transition Metal Chemistry》2009,34(5):571-577
Reduced molybdophosphate-based supramolecular compounds, such as (4,4′-H2bipy)[Co(H2O)2]2[Co(H2PO4)2(HPO4)4(PO4)2(MoO2)12(OH)6] · 17H2O (1), [Co(2,2′-bipy)2(H2O)]4[Co(H2O)2][Co(HPO4)6(PO4)2(MoO2)12(OH)6] · 2H2O (2), and [Co(2,2′-bipy)2(H2O)]4[Co(H2PO4)(H2O)2]2[Co(HPO4)6(PO4)2(MoO2)12(OH)6] · 8H2O (3) (4,4′-bipy=4,4′-bipyridine, 2,2′-bipy=2,2′-bipyridine), have been synthesized under hydrothermal conditions and characterized.
Compound 1 exhibits a three-dimensional supramolecular twofold interpenetrating architecture built up of one-dimensional [P4Mo6]-based infinite covalent chains and free 4,4′-bipy molecules. Compound 2 also shows a three-dimensional supramolecular network constructed from one-dimensional covalent [P4Mo6]-based chains. Unlike compounds 1 and 2, compound 3 exhibits an interesting three-dimensional ‘honeycomb-like’ supramolecular network constructed by the stacking of [Co(2,2′-bipy)2(H2O)] units with one-dimensional channels, in which the [P4Mo6]-based polyoxometalate chains are located. The magnetic properties of compounds 2 and 3 are reported.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
13.
Yan Ding Hongli Chen Weilin Chen Enbo Wang Jingxin Meng 《Transition Metal Chemistry》2009,34(3):281-288
Four novel organic–inorganic hybrid compounds [Cu5
I(4,4′-bpy)3(2,2′-bpy)4][BW12O40] · H2O (1), [Ni0.5(2,2′-bpy)1.25][Ni(2,2′-bpy)3][Ni(2,2′-bpy)2(H2O)(SiW11VIWVO40)] · 0.5H2O (2), [H2bpy]2[Zn(2,2′-bpy)3]2[Si2W18O62] · 1.5H2O (3) and [CuII(2,2′-bpy)2]2[SiW12O40] · 2H2O (4) (2,2′-bpy = 2,2′-bipyridine, 4,4′-bpy = 4,4′-bipyridine) have been synthesized under hydrothermal conditions and characterized
by elemental analysis, IR spectroscopy, thermal gravimetric analysis, electrochemical measurements and single-crystal X-ray
diffraction. Compound (1) is a novel [BW12O40]5− polyoxoanion bisupported by copper(I) coordination cations with mixed 2,2′-bpy and 4,4′-bpy ligands. Compound (2) is constructed from the [SiW11VIWVO40]5− polyoxoanions supported by [Ni(2,2′–bpy)2]2+. Compound (3) is composed of a novel [Si2W18O62]8− cluster and [Zn(2,2′–bpy)3]2+ complexes, which held together into a three-dimensional (3D) supramolecular network through hydrogen-bonding interactions.
Compound (4) shows a 2D layer framework constructed from a bisupporting Keggin polyoxoanion cluster and [Cu(2,2′–bpy)2]2+ coordination polymer fragments, resulting in 3D networks via supramolecular interactions.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
14.
Abstract
Four complexes of 3,3-diphenylpropanoate (L) and 4,4′-bipyridine as auxiliary bridging ligands were synthesized and characterized, namely [Zn(L)2(4bpy)(EtOH)2]∞ (1), [Co(L)2(4bpy)(EtOH)2]∞ (2), [Ni(L)2(4bpy)(EtOH)2]∞ (3), and [Cu(L)2(4bpy)(H2O)]∞ (4) (4bpy = 4,4′-bipyridine). X-ray single-crystal diffraction analyses show that complexes 1–4 all take one-dimensional (1D) fishbone-like structures incorporating bridging 4bpy ligands. The complexes show different supramolecular frameworks interlinked via intermolecular hydrogen bonds, π···π stacking, and/or C–H···π supramolecular interactions. Complex 3 only has a simple one-dimensional fishbone-like chain, whereas complexes 1 and 2 show two-dimensional supramolecular structures by interchain C–H···O hydrogen bonds. Complex 4 is assembled into two-dimensional layers and then an overall three-dimensional framework by a combination of interchain O–H···O hydrogen bonds and C–H···π supramolecular interactions. The luminescent properties of the ligands and their complexes were investigated. 相似文献15.
Abstract Two new coordination polymers, [CoL(bpp)]
n
(1) and [MnL(bipy)]
n
·0.25nH2L·0.5nH2O (2) (H2L = 1,3-adamantanediacetic acid, bpp = 1,3-bis(4-pyridyl)propane, bipy = 4,4′-bipyridine), were synthesized and characterized
by single crystal X-ray diffraction, IR spectroscopy, and thermal analysis. Complex 1 is an one-dimensional (1D) chain structure of Co(II) bridged by L2− as well as bpp. Complex 2 consists of a two-dimensional (2D) (3,6)-connected topology layer structure. Variable temperature magnetic susceptibility
measurements in the range of 2–300 K reveal the existence of weak antiferromagnetic interactions in two complexes with J = −1.74 cm−1, g = 2.26 for 1 and J = −0.10 cm−1, g = 1.67 for 2.
Index abstract Two mental-organic frameworks, namely [CoL(bpp)]
n
(1) and [MnL(bipy)]
n
·0.25nH2L·0.5nH2O (2) (H2L = 1,3-adamantanediacetic acid, bpp = 1,3-bis(4-pyridyl)propane, bipy = 4,4′-bipyridine), have been synthesized based on
1,3-adamantanediacetic acid and N-donor coligand with metal ions Co(II) and Mn(II). The magnetic measurement of the two polymers
reveals typical antiferromagnetism exchange.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
16.
Abstract
The crystal structure of the 2:1 co-crystal of 1,2,5-thiadiazole-3,4-dicarboxylic acid and 4,4′-bipyridine, (C4H2N2O4S)2·C10H8N2, has been determined by X-ray diffraction at the monoclinic space group C2/c with cell parameters of a = 21.388(7) ?, b = 6.735(2) ?, c = 14.877(5) ?, β = 110.431(3)°, and Z = 4. There are one molecule of thiadiazole and a half molecule of bipyridine in the asymmetric unit. The dihedral angle between the pyridine ring planes is 40.5(3)°. Two intramolecular O–H···N [2.730(7) ?] and O–H···O [2.433(6) ?] hydrogen bonds are observed in the thiadiazole molecule. In the crystal structure, the molecules form a unique two-dimensional ladder-type network linked by intermolecular O–H···N [2.704(4) ?] hydrogen bonds and S···O [3.100(5) ?] heteroatom interactions. 相似文献17.
Abstract Two new Keggin-polyoxometalate hybrids, {[Cu2(4,4′-bpy)2][PW10VIW2VO40]}[Cu2(obpy)2]4 · 2 H2O (1) and {[Cu4(2,2′-bpy)4(4,4′-bpy)3][SiW12O40]} · 2H2O (2) (4,4′-/2,2′-bpy = 4,4′-/2,2′-bipyridyl, Hobpy = 6-hydroxy-2,2′-bipyridyl), were hydrothermally synthesized and structurally
characterized. Gillard type hydration of 2,2′-bipy is observed during the synthesis of 1, resulting in a new obpy ligand in situ. X-ray structural analyses show that 1 consists of 1D hybrid chain {[Cu2(4,4′-bpy)2][PW10VIW2VO40]}∞ and [Cu2(obpy)2] dimer, whereas 2 possesses 1D hybrid structure based on Keggin-type [SiW12O40]4− anions and tetra-nuclear copper complexes [Cu4(2,2′-bpy)4(4,4′-bpy)3]4+. Both compounds present interesting supramolecular architectures based on π–π stacking and hydrogen bonds.
Graphical Abstract Compounds {[Cu2(4,4′-bpy)2][PW12O40]}[Cu2(obpy)2]4 · 2H2O (1) and [Cu4(2,2′-bpy)4(4,4′-bpy)3][SiW12O40] · 2H2O (2) were hydrothermally synthesized. 1 features that the [Cu2(obpy)2] dimers based on in situ generated obpy ligands are stumped between the layers where 1D hybrid chain {[Cu2(4,4′-bpy)2][PW12O40]}∞ locates, while 2 exhibits 1D chain-like structure based on anions [SiW12O40]4− and tetra-copper complexes [Cu4(2,2′-bpy)4(4,4′-bpy)3]4+.
相似文献
18.
Hai-Jun Dong Min Wang Shu-Wei Huang Yan-Ling Wu Hao-Hong Li Zhi-Rong Chen 《Journal of Cluster Science》2010,21(4):825-835
Abstract
The hydrothermal reaction of Gd(NO3)3·6H2O with 2,2′-bipyridyl-4,4′-dicarboxylic acid(H2BPDC) ligand results in the formation of a new Gd(III) polymer: {[Gd2(BPDC)3(H2O)3]·H2O} n..(1). The central gadolinium ion is coordinated by eight oxygen atoms to give a dicapped triangular prism geometry. Based on the versatile coordination modes of BPDC2− ligand, together with hydrogen bonds and π···π stacking interactions, a 3-D network is presented. DFT calculation was executed to probe the electronic structure of 1. 相似文献19.
Dong-Yu Lv Zhu-Qing Gao Jin-Zhong Gu Jian-Zhao Liu Wei Dou 《Transition Metal Chemistry》2011,36(3):275-281
Two Mn(II) coordination polymers, namely [Mn(bpda)]
n
(1) and [Mn(bpda)(bpy)0.5]
n
(2) (H2bpda = 1,1′-biphenyl-3,3′-dicarboxylic acid and bpy = 4,4′-bipyridine), have been synthesized from H2bpdc, bpy, and MnSO4·2H2O under hydrothermal conditions. The complexes were characterized by physicochemical and spectroscopic methods, as well as
by X-ray crystallography. Compound 1 possesses a 3D structure consisting of carboxylate-bridged edge-sharing Mn–O–Mn double chains. Compound 2 features a 3D open structure with a dinuclear Mn(II) secondary building unit. Magnetic susceptibility measurements of compounds
1 and 2 exhibit antiferromagnetic interactions between the nearest Mn(II), with J = –11.3 cm−1 and g = 2.12 for 1, and J = –13.5 cm−1 and g = 2.12 for 2. 相似文献
20.
Two new neodymium complexes, [Nd2(abglyH)6(2,2′-bipy)2(H2O)2] · 4H2O 1 and {[Nd(abglyH)3(H2O)2] · (4,4′-bipy) · 7H2O}n
2 (abglyH2 = N-P-acetamidobenzenesulfonyl-glycine acid, 2,2′-bipy = 2,2′-bipyridine, 4,4′-bipy = 4,4′-bipyridine), have been synthesized and
their structures have been measured by X-ray crystallography. In 1, nine-coordinated Nd(III) ions are bridged by two syn–syn bidentate and two tridentate bridging carboxylate groups from four different abglyH− anions to form dinuclear motifs, which are further connected into a 3-D supramolecular framework via hydrogen bonds between
the binuclear motifs and the uncoordinated water molecules. In 2, eight-coordinated Nd(III) ions are linked by six carboxylate groups adopting a syn–syn bidentate bridging fashion to form a 1-D inorganic–organic alternating linear chain. These polymeric chains generate microchannels
extending along the a direction, and these cavities are occupied by discrete tetradecameric water clusters, which interact with their surroundings
and finally furnish the 3-D supramolecular network via hydrogen bonds. At the same time, π–π stacking interactions between
benzene rings from abglyH− anions also play an important role in stabilizing the network. 相似文献