[C5H5Fe(CO)2]LnCl2·nTHF和[C5H5Fe(CO)2][C5H4(SiMe3)]LnCl·nTHF双核配合物的合成

合成了稀土铁双核配合物:(C₅H₅Fe(CO)₂)LnCl₂·nTHF(Ln=Nd,Sm,Gd;n=1,2)和(C₅H₅Fe(CO)₂)(C₅H₄(SiMe₃))·LnCl·nTHF(Ln=Nd,Sm,Gd;n=0,1,2)。元素分析,热分析,红外光谱和质谱分析确认了这两种配合物。红外光谱数据表明铁与稀土原子是以羰基桥连接。晶体结构分析表明((C₅H₅Fe(CO)₂)Na·4THF是(C₅H₅Fe(CO)₂)LnCl₂·nTHF合成的中间体。     

[C_5H_5Fe(CO)_2]LnCl_2·nTHF和[C_5H_5Fe(CO)_2][C_5H_4(SiMe_3)]LnCl·nTHF双核配合物的合成

合成了稀土铁双核配合物:〔C_5H_5Fe(CO)_2〕LnCl_2·nTHF(Ln=Nd,Sm,Gd;n=1,2)和〔C_5H_5Fe(CO)_2〕〔C_5H_4(SiMe_3)〕·LnCl·nTHF(Ln=Nd,Sm,Gd;n=0,1,2)。元素分析,热分析,红外光谱和质谱分析确认了这两种配合物。红外光谱数据表明铁与稀土原子是以羰基桥连接。晶体结构分析表明〔(C_5H_5Fe(CO)_2〕Na·4THF是〔C_5H_5Fe(CO)_2〕LnCl_2·nTHF合成的中间体。     

[(CO)2(C5H5)Fe]2C60的合成与表征

有关 C6 0 取代的金属羰基化合物的研究方兴未艾 .C6 0 作为一个特殊的烯烃 ,以六元环间的碳碳双键提供电子对 ,与过渡金属羰基化合物形成诸如 η2 ,η4 ,η6等结构新颖的化合物约有 40多例 [1～ 5] ,但只有一例是以 Fe为中心原子的 C6 0 取代的金属羰基化合物 ( η2 - C6 0 ) Fe( CO) 4 [1] .本文报道了第一例 C6 0配位的 Fe的双核金属羰基化合物 [( CO) 2 ( C5H5) Fe]2 (η2 - C6 0 ) ,并通过元素分析 ,IR,1H NMR,13CNMR和 XPS进行表征 .1　实验部分[Fe( CO) 2 ( C5H5) ]2 购自 Aldrich公司 .C6 0 纯度为 99% .其余试剂均…     

Isolation of New Disilanylene-bridged Bis（cyclopentadienyl）tetracarbonyldiiron Complexes and Molecular Structure of [η^5, η^5-C5H4SiMe（SiMePh2）C5H4]Fe2（CO）2（μ-CO）2

1,2-Diphenyl-1,2-dimethyldisilanylene-bridged bis-cyclopentadienyl complex[η~5,η~5-C_5H_4PhMeSiSiMePh-C_5H_4]Fe_2(CO)_2(μ-CO)_2(1)was synthesized by a modified procedure,from which the trans-isomer 1b that was pre-viously difficult to obtain has been isolated for the first time.More interestingly,two new regio-isomers[η~5,η~5C_5H_4SiMe(SiMePh_2)C_5H_4]Fe_2(CO)_2(μ-CO)_2(2)and [η~5,η~5-C_5H_4Me_2SiSiPh_2C_5H_4]Fe_2(CO)_2(μ-CO)_2(3)were occa-sionally obtained during above process,the novel structures of which opened up new options for further study ofthis type of Si—Si bond-containing transition metal complexes.The molecular structure of 2 has been determinedby the X-ray diffraction method.     

环状配合物Me_2Si［η~5－C_5H_4Fe（CO）_2］_2SnR_2的合

通过ＳｎＣｌ_２对化合物Ｍｅ_２Ｓｉ［η~５－Ｃ_５Ｈ_４Ｆｅ（ＣＯ）］_２（μ－ＣＯ）_２（Ⅰ）中Ｆｅ－Ｆｅ键的插入反应以及Ⅰ被Ｎａ－Ｈｇ齐还原所生成的相应双铁负离子｛Ｍｅ_２Ｓｉ［η~５－Ｃ_５Ｈ_４Ｆｅ（ＣＯ）_２］_２｝~（２－）与ＳｎＲ_２Ｃｌ_２（Ｒ＝Ｍｅ，Ｐｈ）的亲核反应，合成了环状化合物Ｍｅ_２Ｓｉ［η~５－Ｃ_５Ｈ_４Ｆｅ（ＣＯ）_２］_２ＳｎＲ_２［Ｒ＝Ｃｌ（１），Ｍｅ（２），Ｐｈ（３）］。以元素分析、ＩＲ和~１ＨＮＭＲ谱表征了它们的结构，并用Ｘ射线衍射测定了配合物３的晶体结构。３为单斜晶系，空间群Ｐ２_１／ｎ，ａ＝１．０３８４（３）ｎｍ，ｂ＝１．６３８４（１）ｎｍ，ｃ＝１．５７６２（５）ｎｍ，β＝９７．９３（２）°，Ｖ＝２．６５６（２）ｎｍ~３，Ｚ＝４，Ｄｘ＝１．７１ｇ／ｍＬ。     

[Cp_2Ti(L)X]的ESR谱研究

本文研究了配合物[Cp_2Ti(L)X](Cp:C_5H_5,Me~-C_5H_4,C_5Me_5;L:瞵、异腈、吡啶、胺、一氧化碳等;X:F,Cl,Br,I)的ESR谱,获得了这些配合物的波谱参数。发现在Cl,Br,I三个系列中,g值与钛超精细偶合常数a(Ti)值随L的变化呈线性关系。观测到大量g>g_e的Ti(Ⅲ)配合物的ESR谱,对其规律性进行了探讨。     

(C5H5)2NdCl·2LiCl 与正丁基锂的反应: [Li(DME)3][(C5H5)3Nd(μ-H)Nd(C5H5)3]的合成及其晶体结构

研究了(C5H5)2NdCl·2LiCl与正丁基锂在THF溶液中的反应, 并从该反应液中分离到了钕的氢化物[Li(DME)3][(C5H5)3Nd(μ-H)Nd(C5H5)3] 1. 化合物1经X射线单晶结构测定表明属单斜晶系, 空间群P21/c, 晶胞参数为a=0.9670(2) nm, b=2.1001(5) nm, c=2.1279(7) nm, β=90.89(2)°, Z=4, V=4.321 (2) nm3, Mr=957.36, Dc=1.47 g·cm-3, F(000)=1936, R=0.094, wR=0.100. 1的晶胞中包含两个独立的晶体分子, 每一分子由阴阳离子对[Li(DME)3]+和[(C5H5)3Nd(μ-H)Nd(C5H5)3]-组成. 钕原子与3个η5-C5H5基团配位, 且两个(C5H5)3Nd经氢桥键相连构成阴离子. Nd1-H和Nd2-H键长均为0.218(1) nm.     

配合物{[(C9H7)3Yb]2Cl}[Na·6THF] (Ⅰ)的合成及其还原生成(C9H7)2Yb·2THF (Ⅱ)的研究、配合物I和II的晶体结构

三氯化钇与茚基钠以1∶2摩尔比于THF中,在50 ℃下反应,歧化生成了离子型配合物[(C9H7)3Yb]2Cl[Na·6THF] (Ⅰ). X射线结构分析表明,配合物Ⅰ是由阴离子{[(C9H7)3Yb]2Cl}-及阳离子[Na·6THF] 组成的离子对,阴离子由一个氯桥把两个(C9H7)3Yb基团连接在一起.配合物[(C9H7)3Yb)2Cl][Na·6THF]为三斜晶系,P1空间群,晶胞参数,a=1.0682(2) nm, b=1.2687(3) nm, c=1.2869(2) nm,α=87.223(1)°, β=81.755°, γ=88.217°, V=1.7273(1) nm3, Z=1.配合物I的结构用重原子法确定,用full-matrix least-squares法修正,一致性因子为 R=0.062, Rw=0.072.配合物{[(C9H7)3Yb]2Cl}[Na·6THF]与金属钠反应,生成(C9H7)2Yb·2THF (Ⅱ).配合物Ⅱ的分子结构经过了X射线的表证.     

Density Functional Studies on Isonicotinato Lead(II) Complex [Pb(C5H4NCOO)2]

1 INTRODUCTION Recently, the chemistry of lead is of interest in relation to its toxicity and effects on intelligence in human populations[1~3]. The design of drugs to coun- teract the effects of lead poisoning requires estab- lishing the preferred ligands of Pb(II) and their ste- reochemistry. Consequently, synthesis of chelated- form antidotes for lead(II) ion toxicosis has attracted more and more attention, and numerous reports con- cerning experimental coordination chemistry of lead(…     

Hydrothermal synthesis and crystal structure of a layered coordination polymer: [Zn2(C2O4)2(C3N2H4)2] n

A new metal-organic coordination polymer [Zn₂(C₂O₄)₂(C₃N₂H₄)₂] _n (1) has been hydrothermally synthesized with ZnCl₂·2H₂O, oxalic acid and imidazole. The compound has a 2D network, consisting of infinite zinc(II) oxalate chains connected to each other by three-coordinate oxygen atoms. Within the chains, the zinc atoms are each octahedrally coordinated by one nitrogen atom from imidazole and five oxygen atoms from oxalate groups. Furthermore, there are two coordination modes of oxalate to zinc ions: chelate bis-bidentate and chelate/bridging bis-bidentate in compound 1, and the latter is rare among related compounds. Crystal data: monoclinic, P2(1)/c, a?=?8.4310(17), b?=?9.4060(19), c?=?8.2790(17)?Å, β?=?93.15(3)°, V?=?655.5(2)?ų, Z?=?2, R ₁?=?0.0322, wR ₂?=?0.0850.     

Studies on the Reactivity of [Ge9]4− towards [Fe(cot)(CO)3]: Synthesis and Characterization of [Ge8Fe(CO)3]3− and of the Anionic Organometallic Species [Fe(cot)(CO)3]−

Reaction of cyclooctatetraene (COT) iron(II) tricarbonyl, [Fe(cot)(CO)₃], with one equivalent of K₄Ge₉ in ethylenediamine (en) yielded the cluster anion [Ge₈Fe(CO)₃]^3? which was crystallographically‐characterized as a [K(2,2,2‐crypt)]⁺ salt in [K(2,2,2‐crypt)]₃[Ge₈Fe(CO)₃]. The chemically‐reduced organometallic species [Fe(η³‐C₈H₈)(CO)₃]^? was also isolated as a side‐product from this reaction as [K(2,2,2‐crypt)][Fe(η³‐C₈H₈)(CO)₃]. Both species were further characterized by EPR and IR spectroscopy and electrospray mass spectrometry. The [Ge₈Fe(CO)₃]^3? cluster anion represents an unprecedented functionalized germanium Zintl anion in which the nine‐atom precursor cluster has lost a vertex, which has been replaced by a transition‐metal moiety.     

Reaction of (η5‐C5H5)Fe(CO)2I with Anionic Bidentate Phosphine Ligands PPh2(o‐C6H4NHLi) or PPh2(o‐C6H4OLi)

The o‐substituted hybrid phenylphosphines, PPh₂(o‐C₆H₄NH₂) and PPh₂(o‐C₆H₄OH), could be deprotonated with LDA or n‐BuLi to yield PPh₂(o‐C₆H₄NHLi) and PPh₂(o‐C₆H₄OLi), respectively. When added to a solution of (η⁵‐C₅H₅)Fe(CO)₂I at room temperature, these two lithiated reagents produce a chelated neutral complex 1 (η⁵‐C₅H₅)Fe(CO)[C(O)NH(o‐C₆H₄)PPh₂‐C,P‐η²] for the former and mainly a zwitterionic complex 2 , (η⁵‐C₅H₅)Fe⁺(CO)₂[PPh₂(o‐C₆H₄O^?)] for the latter. Complex 1 could easily be protonated and then decarbonylated to give 4 [(η⁵‐C₅H₅)Fe(CO){NH₂(o‐C₆H₄)PPh₂‐N,P‐η²}⁺]. Complexes 1 and 4‐I have been crystallographically characterized with X‐ray diffraction.     

Synthesis and Crystal Structure of the Dicopper(II) Complex [Cu2{Ph2P(=O)(o‐C6H4)CO2}2(THF)2(H2O)2][BF4]2 by Oxidation of [Cu{Ph2P(o‐C6H4)C(=O)H}2(NCMe)][BF4] with Aqueous H2O2

Treatment of [Cu(pcho)₂(NCMe)][BF₄] 1 (pcho = 2‐(diphenylphosphino)benzaldehyde) with aqueous H₂O₂ in THF solvent affords [Cu₂(dpb)₂(THF)₂(H₂O)₂] [BF₄]₂ 2 (dpb = 2‐(diphenylphosphinoxide)‐benzoate) after crystallization from diethyl ether. This reaction involves oxidation of Cu(I) to Cu(II) ion, phosphine to phosphinoxide, and benzaldehyde to benzoate species. The crystal structure of 2 consists of two copper(II) atoms bridged by two carboxylate moieties of the dpb ligands. The coordination about each copper(II) atom is a distorted trigonal bipyramid.     

Reactivity of fac-[PPN][Fe(CO)3(TePh)3]: Structure of Fe2(μTePh)2(NO)4

Addition of NOBF₄ to fac-[PPN][Fe(CO)₃(TePh)₃] in THF at ambient temperature results in formation of Fe₂(μ-TePh)₂(NO)_4l Fe₂(?TePh)₂(CO)₆ and organic products. Methylation of fac-[PPN][Fe(CO)₃- (TePh)₃] by Mel or [Me₃O][BF₄] leads to the known dimer Fe₂(μ.-TePh)₂(CO)₆ and organic products. Fe₂(μ-TePh)₂(NO)₄ crystallizes in the orthorhombic space group P bca, with a = 12.701(5) Å, b = 6.7935(16) Å, c = 21.299(9) Å, V = 1837.8(11) ų, and Z = 4. The core geometry of Fe₂(μ-TePh)₂(NO)₄ is best described as a Fe₂Te₂ planar rhombus with Te-Fe-Te bond angle 112.09(4)°. A Fe-Fe bond (length 2.827(2) Å) is proposed for Fe₂(μ-TePh)₂(NO)₄ on the basis of the 18-electron rule. The iron atom adopts a distorted tetrahedral geometry with acute bridge Fe-Te-Fe angles 67.91(3)°, and bridging Fe-Te bond of length 2.53(1) Å.     

{[Cd(sulfadiazine)2]n [Cd(sulfadiazine)2·H2O]n}(英)

C om m ent Silver and zinc salts of sulfadiazine are widely used to prevent bacterial infection for both hum ans and anim als during burn treatm ents[1~4]. Because the slow release of the m etal ions highly relevant to the biologicalactivity ofthese polym…