共查询到20条相似文献,搜索用时 15 毫秒
1.
Journal of Structural Chemistry - Chain coordination polymer [Cu(NH3)2]2[{Cu(NH3)}2{Cu(NH3)(OH)}Re6Se8(CN)6] (1) is obtained by a reaction of Cs2.75K1.25[Re6Se8(CN)4(OH)2]·H2O with CuCN in the... 相似文献
2.
Park S. Ch. Kuratieva N. V. Pomelova T. A. Naumov N. G. 《Journal of Structural Chemistry》2022,63(6):868-873
Journal of Structural Chemistry - CsLnZnS3 (Ln = Gd, Dy) crystals are obtained by the interaction of metal sulfides in the cesium iodide melt. It is found that these compounds are... 相似文献
3.
4.
N. G. Naumov Yu. V. Mironov K. A. Brylev V. E. Fedorov 《Journal of Structural Chemistry》2006,47(4):771-776
The rhenium cluster complex [{Cu(H2O)0.5(en)2} {Cu(en)2} Re6Se8(CN)6]·3H2O has been obtained by the reaction of an aqueous solution of K4[Re6Se8(CN)6]·3.5H2O with an aqueous solution of Cu(en)2Cl2 using cross diffusion through a gel. The structure of the compound has been characterized by a single-crystal X-ray diffraction method (a = 10.690(3) Å, b = 15.035(5) Å, c = 25.847(8) Å, V = 4154(2) Å3, Z = 4, space group P212121, R = 0.0651). Cluster anions [Re6Se8(CN)6]4? in the complex are connected with Cu2+ cations by cyano bridges resulting in zigzag chains. Coordination environment of cations is completed by ethylenediamine molecules. Additionally each cluster anion is coordinated by one terminal fragment {Cu(H2O)0.5(en)2}. 相似文献
5.
我们曾测定NdCl_3·4THF的晶体结构,并研究了它对双烯烃聚合的活化作用.本文报导含二甲氧基乙烷(Dimethoxyethane,简称DME)的SmCl_3(DME)·2THF的制备及其单晶结构,以利于对稀土催化双烯烃聚合反应机理作出更好的解释. 相似文献
6.
7.
8.
《结构化学》1991,(3)
<正> [(C6H5)4P]Cu(S2C6H4)2(Ⅰ),Mr = 683. 39,monoclinic,space group C2/c,a=16. 099 (4),b= 11. 913(3) ,c = 16: 715(9) A ,β=97. 13(4)°, v = 3180. 7 A3,z=4.MoKa radiation,λ= 0. 71069A ,Dc= 1. 427g/cm3,μ= 10. 1cm-1,F(000) = 1400,R=0. 061 and Rw = 0. 068 for 2189 reflections with Ⅰ>3σ(Ⅰ). [(C6H5)4P]Cu (S2C7H6)2(Ⅰ),Mr = 711. 45,monoclinic,space group C2/c,a=16. 501(6),b = 37. 461 (15),c=16. 684(4)A,β=96. 70(4)°, v= 10248. 8(46) A3,z= 12. MoKa radiation, λ= 0. 71069A,Dc=1.383g/cm3,μ=9. 45cm-1,F(000).= 4416,R= 0. 074 and Rw= 0. 078 for 2085 reflections with I>2σ(I)(1). The copper atom in the complexes is surrounded by four sulfur atoms from two dithiolato ligands in an approximate, square-plane. The average Cu-S distances of the copmplexes(Ⅰ) and (Ⅱ) are 2. 179 and 2. 178 A, respectively. 相似文献
9.
10.
Ranganathan A El-Ghayoury A Mézière C Hartê E Clérac R Batail P 《Chemical communications (Cambridge, England)》2006,(27):2878-2880
The ionic character of a set of two redox linkages and strong, directional halogen bonding at the organic-inorganic interface compromise to produce two materials sharing a common two-dimensional net, eventually extended in a third dimension, although two of the six symmetrical halogen bond acceptors ultimately remain uninvolved as a result of charge densification. 相似文献
11.
Journal of Structural Chemistry - Derivatives of tris(4-fluorophenyl)antimony (4-FC6H4)3Sb(OC6H3F2-2,4)2 (1), (4-FC6H4)3Sb[OC(O)C6H3F2-2,5]2 (2) and (4-FC6H4)3Sb[OC(O)C≡CPh]2 (3) are prepared... 相似文献
12.
13.
We have investigated rarely observed 77Se J-couplings (spin-spin couplings) in the mixed-metal face-capped octahedral clusters [Re5OsSe8(CN)6]3- and [Re4Os2Se8(CN)6]2- at natural abundance. To the best of our knowledge, these are the first observations of Se-Se spin-spin interactions between mu3-Se sites, important for stereochemical assignments in hexarhenium analogues, Chevrel phase materials, and similar cluster materials. NMR techniques such as COSY, INADEQUATE, and 2D J-resolved spectroscopy have been used in conjunction to study these interactions. The two isomers (cis and trans) of [Re4Os2Se8(CN)6]2- were distinguishable, and selective isotopic labeling of [Re5OsSe8(CN)6]3- with 13CN ligands enabled resonances to be assigned by observing the 2J (Se-M-C) couplings. For [Re5OsSe8(CN)6]3-, two different 2J (Se-M-Se) couplings were measurable on a single cluster, and these are related to one another through spin-spin interactions across a face diagonal or along an edge of the cube of inner selenium ligands. A rigorous analysis based on combinatorial math has been invoked to assign the couplings on the basis of the probability of multiple-spin interactions. The face diagonal association is found to result in a J-coupling interaction larger in magnitude than that from coupling along an edge of the cube-information critical for making stereochemical assignments of selenium sites. 相似文献
14.
15.
16.
Baudron SA Batail P Rovira C Canadell E Clérac R 《Chemical communications (Cambridge, England)》2003,(15):1820-1821
Neutral pi-conjugated molecules and their radical cations co-exist in [(EDT-TTF-CONHMe+*)4(EDT-TTF-CONHMe0)2] [Re6Se8(CN)6]4- (CH3CN)2(CH2Cl2)2 whose crystal structure reveals that, upon one-electron oxidation, an activation of the N-H and C-H hydrogen bond donor ability is coupled to a deactivation of the hydrogen bond acceptor character of the carbonyl oxygen atom: this is expressed in the supramolecular hydrogen bond pattern and, ultimately, into charge localisation and partition in the solid state. 相似文献
17.
Juraj Kuchr Juraj ernk Werner Massa 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(8):m418-m420
The title compound, bis[diaquabis(ethylenediamine‐κ2N,N′)copper(II)] hexacyanoiron(II) tetrahydrate, [Cu(C2H8N2)2(H2O)1.935]2[Fe(CN)6]·4H2O, was crystallized from an aqueous reaction mixture initially containing CuSO4, K3[Fe(CN)6] and ethylenediamine (en) in a 3:2:6 molar ratio. Its structure is ionic and is built up of two crystallographically different cations, viz. [Cu(en)2(H2O)2]2+ and [Cu(en)2(H2O)1.87]2+, there being a deficiency of aqua ligands in the latter, [Fe(CN)6]4− anions and disordered solvent water molecules. All the metal atoms lie on centres of inversion. The Cu atom is octahedrally coordinated by two chelate‐bonded en molecules [mean Cu—N = 2.016 (2) Å] in the equatorial plane, and by axial aqua ligands, showing very long distances due to the Jahn–Teller effect [mean Cu—O = 2.611 (2) Å]. In one of the cations, significant underoccupation of the O‐atom site is observed, correlated with the appearance of a non‐coordinated water molecule. This is interpreted as the partial contribution of a hydrate isomer. The [Fe(CN)6]4− anions form quite regular octahedra, with a mean Fe—C distance of 1.913 (2) Å. The dominant intermolecular interactions are cation–anion O—H⋯N hydrogen bonds and these interactions form layers parallel to (001). 相似文献
18.
Donna M. Smith Thomas E. Albrecht-Schmitt James A. Ibers 《Angewandte Chemie (International ed. in English)》1998,37(8):1089-1091
An unusual route to the maleonitrilediselenolate (mns) ligand has been discovered with the isolation of compounds that contain this ligand bound to silver (structure shown on the right) or antimony. The formation of the [As(Se)3(CH2CN)]2− anion along with possible pathways to the mns ligands is discussed. 相似文献
19.
Juraj ernk Khalil A. Abboud 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(3):m167-m170
Partial reduction of the CuII ions in the aqueous system CuII–en–[Ni(CN)4]2? (1/1/1) (en is 1,2‐diaminoethane) yields a novel heterobimetallic mixed‐valence compound, poly[[aquabis(1,2‐diaminoethane)copper(II)] [hexa‐μ‐cyano‐tetracyanobis(1,2‐diaminoethane)tricopper(I,II)dinickel(II)] dihydrate], [Cu(C2H8N2)2(H2O)][Ni2Cu3(CN)10(C2H8N2)2]·2H2O or [Cu(en)2(H2O)][Cu(en)2Ni2Cu2(CN)10]·2H2O. The structure is formed by a negatively charged two‐dimensional array of the cyano complex [Cu(en)2Ni2Cu2(CN)10]n2n?, [Cu(en)2(H2O)]2+ complex cations and water molecules of crystallization. These last are involved in a complicated hydrogen‐bonding system. The cyano groups act as terminal, μ2‐bridging or μ3‐bridging ligands. 相似文献