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1.
SynthesisandCrystalStructureof(Et_4N)_2[Pd_2(mp)_2(mpH)_2]ShiJi-Cheng;HuangXiao-Ying;WenTing-Bin;DengYu-Heng;ChengChang-Neng;Li?.. 相似文献
2.
Reaction of the semi-rigid ligand 2,4-bis(1-imidazolylmethyl)-mesitylene (m-bimms) with CdCl2 afforded a boat-like molecular rectangle [Cd(m-bimms)Cl2]2 · 1/2H2O (1), with the orientation of the two imidazolyl arms of the ligand in syn-conformation and bridging chloride ions bisecting the macrocycle. Weak Cl· · ·H—C interations further extended the dimers into 1D infinite chains with nanoscopic channels. An analogous reaction with Cd(NO3)2 gave a 1D coordination polymer [Cd(m-bimms)2(NO3)2]n · 2nH2O (2) composed of nanoscopic metallamacrocycles, where the two imidazolyl arms adopt an anti-conformation. Different anions result in different ligand conformations and thus determine the varied molecular architectures. 相似文献
3.
A series of tetranuclear Mo(W)-Ag mixed-metal clusters have been synthesized by making use of the solid state reactions of [NH4]2[MYS3](M= Mo, W; Y= O, S), AgX(X= Cl, Br, I) and (n-Bu)4NX' (X' =Cl, Br), two of which [(n-Bu)4N]3[MoOS3Ag3Br4] (1) and [(n-Bu)4N]3[WS4Ag3Cl4] ( 2 ) have been structurally characterized by X-ray analysis. The crystal data: 1 , cubic, P4 3m, αequals;12.093(4) Å, Z=1, R =0.076; 2 , cubic, P4 3m, αequals;12.059(2) Å, Z =1, R =0.075. The cluster anion core [Ag3MS3X'] of the two compounds can be viewed as a cube in which the four metal atoms and the four non-metal atoms are statistically distributed, respectively. Substitution reaction with PPh3 ligand is also discussed for this type of tetranuclear clusters. 相似文献
4.
Jian-Ping Lang Guo-Qing Bian Jin-Hua Cai Bei-Sheng Kang Xin-Quan Xin 《Transition Metal Chemistry》1995,20(4):376-379
Summary Reaction of [NH4]2[WS4] with CuX (X = Cl or I) and R4NX (R = Et or n-Bu) in the solid state gave two new bimetallic compounds with W:Cu compositions from 1:3 to 1:4. Compound (1), [(n-Bu)4N]3[WS4Cu3Cl3Br], crystallizes in the hexagonal space group R3c with a = 17.051(5), c = 38.372(5) Å, V = 9661.8 Å3, Z = 6. The cluster anion of (1) comprises a cubane-like cluster core [WS3Cu3Br] of C3 symmetry with a Cl atom attached to each of the three Cu atoms and one terminal sulphido ligand attached to the W atom. Compound (2), [Et4N]4[WS4Cu4I6], crystallizes in the monoclinic space group C2/m with a = 29.702(6), b = 12.7887(5), c = 15.327(3)Å, = 99.69(2), V = 5738.1 Å3, Z = 4. In the cluster anion of (2), four edges of the WS4 core are coordinated by four Cu atoms, giving a WS4Cu4 aggregate of approximate C2V symmetry. 相似文献
5.
Cao Rong Lei Xin-Jian Hong Mao-Chun Xie Xiu-Lan Kang Bei-Sheng Jiang Fei-Long Liu Qiu-Tian Liu Han-Qin 《结构化学》1995,(1)
Syntheses,StructuresandSpectroscopicPropertiesofMo(W)-Cu-S-ClusterCompoundswithDialkyldithiocarbamateLigandsCaoRong;LeiXin-Ji... 相似文献
6.
Liu Qiu-Tian Huang Liang-Ren Kang Bei-Sheng Liu Chun-Wan Wang Ling-Ling Lu Jia-Xi 《中国化学》1986,4(2):107-115
A single MoFe3S4 cubane-like cluster compound has been synthesized through spontaneous self-assembly of simple inorganic salts with organosulfur ligand for the first time. (Et4N)-(MoFe3S4(Et2NCSS)5] CH3CN(1) is quite stable in air. The crystal of 1 is monoclinic with space group P2/c, a=22.897 (3)Å, b= 12.399 (2)Å, c=20.928 (4)Å, β=97.15 (1)°, and Z=4. A full matrix least-squares refinement with 6725 unique reflections for all nonhydrogen atoms gives R=0.068. The anion of 1 is the first isolated single MoFe3S4 cubane cluster with core oxidation state [MoFe3S4]4+. The distance between the two 6-coordinate metal atoms (Mo, Fe) is 2.624 Å, which is the shortest M-M' bond observed for Mo-Fe-S clusters so far and the only one shorter than similar distances in FeMo-cofactor. The bond orders of this anion were calculated by EHMO method and the results coincide with the general rule. The structural feature and the unusual stability of 1 can be attributed to the bidentate chelating effect of Et2NCSS-, which leads to high coordination of metal atoms and the various ligated types. 相似文献
7.
The mononuclear complex Fe(II)(mtq)2{P(OCH3)3}2 (Hmtq = 8-Mercaptoquinoline) with mixed N-heterocyclic thiolato and phosphite ligands was synthesized and characterized by X-ray crystallography and cyclic voltammetric measurement. The title complex crystallizes in the triclinic space group P-1 with a = 8.929(4), b = 9.965(3), c = 16.913(11) Å, α = 76.21(10), β = 80.89(10), γ= 68.010(10)°, V = 1351.2(11) Å3. The Fe(II) atom exhibits an elongated octahedral geometry composed of N2S2P2 donors. The equatorial plane is made up of two cis-oriented N donors from the thiolato ligands and two cis-oriented monodentate P(OCH3)3 ligands. The apical sites are occupied by two trans-oriented S atoms from the mtq? ligands. The thione form is predominant coordination mode of 8-mercaptoquinoline with the N and S donors bound to the Fe(II) to form five-membered chelate rings. The structural feature of the mononuclear Fe(II) complex with mixed phosphite and thiolate ligands is summarized. 相似文献
8.
对~(95)MoNMR的特点、提供的信息、发展历史以及研究现状作了较为全面的介绍。结合本实验室研究工作和部分文献报道对其在钼化学研究中的应用进行了较为详细的论述,同时还指出影响~(95)MoNMR的因素并进行了简单分类和讨论。 相似文献
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10.
对含手性膦配体甲基-3-脱氧-3-(二苯膦基)-4,6-氧-苄叉基-a-D-吡喃阿卓糖苷(3-MBPA)和甲基-2-脱氧-2-(二苯膦基)-4,6-氧-苄叉基-a-D-吡喃阿卓糖苷(2-MN-PA)及邻巯基氧化吡啶配体mpo的金配合物An[(3-MBPA)(mpo)](1)、An[(2-MBPA)(mpo)](2)和钯配合物Pd[(3-MBPA)(mpo)C1](3)、Pd[(2-MBPA)(mpo)-C1](4)进行1H和13CNMR谱测定,利用一维和二维NMR技术归属了所有的1H和13CNMR谱线,结果表明:配体MBPA与金属配伍的是P原子,糖苷上H-5的化学位移变化最大,而且与配位金属的种类有关;配体mpo以单齿形式与金属配位时,是S原子参与配位。 相似文献