Roussin红盐衍生物[Fe_2(μ_2-SC_6H_4F)_2(NO)_4]的晶体与分子结构

Roussin黑盐与重氮盐反应,可以得到络合物[Fe-2S_2(C_6H_4F)_2(NO)_4]。它是一种暗红色的晶体,属于三斜晶系,空间群P_~-,晶胞参数a=10.217 4),b=10.143(1),c=8.955(1),α=105.68(4)°,β=99.91(2)°,Υ=83.44(2)°,Z=2。应用X射线衍射方法测定晶体结构。由重原子法解出结构,并经全矩阵最小二乘法修正,R=0.029。单胞中的两个分子以对称心相连系。Fe原子为四面体配位,两个-SR基团上的S原子以桥键与两个Fe原子构成Fe_2S_2的菱形平面,四个-NO基则分别与两个Fe原子配位。     

簇合物(μ-SC6H5)(μ-P(SC6H5)2)Fe2(CO)6的合成和晶体结构

用Fe_3(CO)_(12)与亚磷酸三硫代苯酯P(SC_6H_5)_3反应得到标题化合物。P(SC_6H_5)_3以其裂解分子片SC_6H_5和P(SC_6H_5)_2配位。用X-ray衍射技术测定了该化合物的晶体结构, 晶体属正交晶系, 空间群为Pbca, a=1.7422(7), b=1.0634(6), c=2.898(12) nm; V=5.370 nm, z=8, D_c=1.579 g·cm~(-3)。由直接法和差值Fourier合成解出全部非氢原子坐标, 并用全矩阵最小二乘法修正, 最后偏离因子R=0.054, R_w=0.058, 分子结构中心的Fe_2SP折叠环沿S…P线或沿Fe—Fe键折叠的二面角(分别为76.1°和82°)比其它具有中心Fe_2S_2, Fe_2P_2和Fe_2SP折叠环的类似化合物中的相应值小, Fe—Fe键长为0.2572 nm, Fe—S(1)—Fe=68.6°, Fe—P—Fe=70.7°。     

簇合物[Fe_6S_9(SCH_2CH_2OH)Cl]~(4-)的合成、结构和性质研究

将一定量的FeCl_2,(NH_4)_2MoS_4和HSCH_2CH_2OH在甲醇-甲醇钠溶剂中反应,制备出[(C_2H_5)_4N]_4[Fe_6S_9(SCH_2CH_2OH)Cl]单晶。该化合物属三斜晶系,P1空间群,a=12.818(4),b=13.622(3),c=18.328(7),α=106.09(2)°,β=100.75(2)°,γ=102.69(2)°,Z=2。对7517个可观测反射(1>3σ(Ⅰ))精修所有结构参数,得到一致性因子R=0.0818。结构测定结果表明:在[Fe_6S_9(SCH_2CH_2OH)Cl]~(4-)中存在着μ_2—S桥,μ_3—S桥和μ_4—S桥。该簇合物的核[Fe_6S_9]~(2-)由8个非共面的菱形组成。其中有4个Fe(μ_2—S)(μ_3—S)Fe,2个Fe(μ_2—S)(μ_4—S)Fe和2个Fe(μ_3—S)(μ_4—S)Fe菱形。用EHMO方法对簇合物电子结构进行了量子化学的研究。结构上键长表现出Fe—(μ_4—S)>Fe—(μ_3—S)>Fe—(μ_2—S)的规律,与EHMO计算得到键序Fe(μ_4—S)相似文献   

新型氧桥和多硫基杂桥联的双核钼硫亚硝基化合物〔(CH_3)_4N〕_2K〔Mo_2OS_2(NO)_2(S_2)_2S_5)·H_2O的合成和晶体结构

本文报导[(CH_3)_4N]_2K[Mo_2OS_2(NO)_2(S_2)S_5]·H_2O的合成和晶体结构。该化合物晶体属于单斜晶系,所属的空间群为P2_1/c。晶胞参数为:a=13.320(2),b=17.377(2),c=13.269(3),β=107.93(2)°,Z=4。在CAD—4四圆衍射仪上,用MoKα射线收录了3576个独立衍射数据(I≥3σ(I))。晶体结构用直接法解出,经Fourier合成和全矩阵最小二乘方修正,最后偏离因子R=0.045。结构分析表明,晶体中Mo—Mo间距为3.421,二钼原子间未成键。Mo原子周围呈近似五角双锥的七配位构型。本结构的特征在于二Mo原子间除双硫桥外还存在氧桥。     

簇合物(μ-SC_6H_5)(μ-P(SC_6H_5)_2)Fe_2(CO)_6的合成和晶体结构

用Fe_3(CO)_(12)与亚磷酸三硫代苯酯P(SC_6H_5)_3反应得到标题化合物。P(SC_6H_5)_3以其裂解分子片SC_6H_5和P(SC_6H_5)_2配位。用X-ray衍射技术测定了该化合物的晶体结构,晶体属正交晶系,空间群为Pbca,a=17.422(7),b=10.634(6),c=28.987(12)A;V=5370A~3,z=8,D_c=1.579g·cm~(-3)。由直接法和差值Fourier合成解出全部非氢原子坐标,并用全矩阵最小二乘法修正,最后偏离因子R=0.054,R_w=0.058, 分子结构中心的Fe_2SP折叠环沿S…P线或沿Fe-Fe键折叠的二面角(分别为76.1°和82°)比其它具有中心Fe_2S_2,Fe_2P_2和Fe_2SP折叠环的类似化合物中的相应值小,Fe-Fe键长为2.572A,Fe-S(1)-Fe=68.6°,Fe-P-Fe=70.7°。     

三核簇合物(Et_4N)_2[(CO)_4MoS_2MoS_2Mo(CO)_4]和(Et_4N)_2[(CO)_4MoS_2WS_2Mo(CO)_4]的合成及晶体结构

合成了含Mo(O)的三核化合物(Et_4N)_2.[(CO)_4Mo(μ-S)_2Mo(μ-S)_2Mo(CO)_4](Ⅰ)和(Et_4N)_2[(CO)_4Mo(μ-S)_2W(μ-S)_2Mo(CO)_4](Ⅱ),测定了(Ⅰ)的晶体结构.Ⅰ属单斜晶系,空间群P2_1/c,a=22.790(5),b=8.701(1),c=17.764(5)(?).γ=94.09(2)°,Z=4,最终R=0.045.Ⅰ的阴离子中,三个Mo间键角175°,接近共线.整个阴离子可以看作是由2个以Mo(0)为中心的八面体和1个以Mo(Ⅵ)为中心的准四面体分别共用一条边(各由2个μ-S原子连线所成)组成的结构.Mo-Mo-Mo键距分别是2.998(1)和3.000(1),Mo(μ-S)_2Mo共平面.     

THE MOLECULAR AND CRYSTAL STRUCTURE OF [Et4N]2[Fe2S2（NO）4]

<正> The compound [Et_4N]_2[Fe_2S_2(NO)_4] (M_r=556.36) crystallizes in the monoclinic,space group P 2_1/n with a=9. 688(3), b=10. 882(2), c=12. 625(2), β=97. 86(3)°, Z=2, V=1318. 4, D_c=1. 40g/cm~3, ;μ(MoK_a)=12. 8cm~(-1) and F(000)=588. The final R=0. 028 and R_w=0. 029 for 2041 reflections (I≥3σ(I)).The crystals of [Et_4N]_2[Fe_2S_2(NO)_4] consist of discrete cations [Et_4N]~+ and anions     

(μ-σ,π-反式-C_6H_5CH=CH)(μ-C_2H_5S)Fe_2(CO)_6的分子和晶体结构

标题化合物由[(μ-CO)(μ-C_2H_5S)Fe_2(CO)_6](C_2H_5)_3NH和反式或反式-C_6H_5CH=CHBr制得。其晶体属空间群C_c;a=1.8053 nm,b=1.0436 nm,c=1.9045 nm;β=93.68°;D_c=1.66g/cm~3;Z=8;R=0.0413。Fe—Fe键长为0.2542nm,苯乙烯基配体的C=C双键为0.1358 nm,乙基以e-键与硫桥原子相连。     

铁钼硫原子簇化合物的合成与结构研究 Ⅰ.(Et_4N)_4[Mo_2Fe_7S_8(SPh)_(12)]的合成与晶体结构

本文通过对巯基铁与MoSi_4~(2-)反应的研究,对双立方烷型铁-钼-硫原子簇化合物的形成途径及中间物作了讨论.同时报道了[Fe_4(SPh)_(10)](Et_4N)_2与[MoS_4][Et_4N]_2反应的产物(Et_4N)_(4~-)[Mo_2Fe_7S_8(SPh)_(12)](2)的合成、晶体结构、红外光谱和磁化率.晶体2属三斜晶系,M_r=2670.3;空间群PI;α=12.775(4),b=13.076(3),c=20.576(4)A;α=80.00(2)°,β=81.39(2)°,γ=61.51(2)°;V=2966.3(14)A~3;Z=1;D_c=1.495g·cm~(-3);F(000)=1378;偏离因子R=0.077.特别指出了分子中Mo—Mo’的距离[7.188(6)A]是当今同类化合物中最长的,它对研究固氮酶活性中心模型物的合成和结构规律,有重要意义.     

二核Fe/S化合物(Et4N)2[Fe2S2Br4]的合成与结构

标题化合物(Et_4N)_2[Fe_2S_2Br_4](1)在VS_4~(3-)/FeBr_2/imnt~(2-)/Et_4NCI的反应体系中获得,它属于单斜晶系,空间群P2_1/n,主要晶胞参数为:α=0.91193(2)nm,b=1.03874(3)nm,c=1.54360(1)nm,β=105.090(1)°,V=1.41177(5)nm~3,Z=2, ρ=1.778g/cm~3,μ=6.841cm~(-1),F(000)=748,结构精修结果为:R_1=0.0287,wR_2=0.0640.簇阴离子[Fe_2S_2Br_4]~(2-)含有一个菱形Fe_2S_2单元,铁的配位几何构型明显偏离了理想的T_d对称性,导致整个阴离子的对称性降低为D_(2h).同时观察到它的Fe-Br键呈现反常加长倾向.     

CRYSTAL STRUCTURE OF A LINEAR TETRANUCLEAR Mo-Fe-S CLUSTER, (Et_4N)_4C(MoS_4)_2Fe_2S_2D·(CH_3OH)_2

<正> C_34H_88O_2N_4Mo_2Fe_2S_10, Mt= 1209. 25,monoclinic, P2_1/a,a= 17. 722 (7) ,b= 11. 857(5),c= 13. 743(5) A .β= 112. 29 (3)°, V= 2672. 0A3,Z = 2,Dc = 1. 503 g·cm-33,μ(Moka) = 14. 0 cm-1,T=193 K. Final R=0. 045 for 1943 observed reflections (I≥3σ(I)). In the anion [(MoS4)_2Fe2S2]4- ,the two Fe atoms, each attached with a chelating MoS42- unit, are bridged by two sulfur atoms. The metal atoms are arranged in a linear fashion with Mo-Fe-Fe angle of 179. 1(1)°, and Fe-Fe and Fe-Mo distances of 2. 746(2) and 2. 801(2) A, respectively. The long Fe-S distances (average 2. 246A) in Fe2S2 ring could be a result of the hydrogen-bonding interaction between the sulfur atom and the methanolic hydrogen atom.     

CRYSTAL STRUCTURE OF BIS(TETRAETHYLAMMONIUM) BIS-[BIS(p-CHLOROPHEN- THIOLATO)(μ-SULFIDO) IRON(Ⅲ)], (Et4N)_2[Fe_2S_2(SC_6H_4Cl-p)_4]

<正> (Et_4N)_2[Fe_2S_2(SC_6H_4Cl-p)_4], Mr=939.89, F(000)=492, triclinic, P1,a=9.358(4), b=10.535(3), c=14.537(2)A,α=64.96(2),β=70.29(2),γ= 68.22(2)°, V=1177.8(13)A3, Z=1,Dc=1.325 gcm-3, MoKα ,λ=0.71069A. Final R= 0.061,Rw=0.076, for 1794 independent observed reflections. The anion contains a planar Fe2S2 core. Each iron atom is coordinated by two μ2-S atoms and two thiolate sulfur atoms to form the tetrahedral geometry. The structure of the cation has its positional disorder.     

STRUCTURE OF A Fe-S CLUSTER COMPLEX [{(μ-PhCH_2S)Fe_2(CO)_6}_2(μ4-S)]

<正> [{(μ-PhCH2S)Fe2(CO)6}2(u4-S)], Mr = 837.95, triclinic, Pl,a=13.701(3),b=16.542(5), c=17.030(5)A,α=107.69(2),β=90.15(2),γ= 114.49(2)°,V=3309.3A3, Z=4, Dx=1.68 g/cm3,MoKa,λ=0.71069A μ=20.2 cm-1,F(000)=2008, room temperature, final R=0.035 for 4960 independent reflections. The molecule possesses approximate C2 symmetry with the pseudo-twofold axis passing through the unique sulfur atom u4-S(2) and the midpoint of the other two u2-sulfur atoms S(1) and S(3). The unique u4-sulfur atom has a tetrahedral geometry and donates its six valence electrons to the four iron atoms. The average Fe-(μ4-S) distance of 2.247 A is slightly shorter than the average Fe-(μ2-S) distance of 2.265A.     

STRUCTURAL STUDY ON HETEROCYCLIC CARBENE-CONTAIN-ING IRON CARBONYL CLUSTER-STRUCTURES OF Fe_3(CO)_8-[CNH C(CH)_4CNH](μ_3-S)_2

<正> The title cluster Fe3(CO)8[CNH C(CH)4CNH] (μ3-S)2 has beensynthesized and its crystal and molecular structure determined. Crystal data: C15 H6N2O8S2Fe3, Mr = 646. 27, triclinic, space group P1, a = 8. 6664(1), 6=10. 7857 (2), c=12.5536(3)(?),α=112. 3944(2), β=106. 4103(2) ,γ = 95.541(1)°, V = 1012. 8(?)3. Z = 2, Dc=1. 888gcm-3, μ=23. 639cm-1, final R = 0. 0477, Rw =0. 0535 for 2583 independent reflections. The cluster is a carbene derivative of Fe3-(CO)9S2, and contains a heterocyclic fragment c as the carbene ligand whichreplaces a terminal axial CO ligand of atom Fe(l) and locates in a vertical position to the distorted basal plane formed by Fe(1)S(1)Fe(2)S(2). The geometry of Fe3-(CO)9(μ3-S)2 has been maintained in the title compound but some of the Fe-S bond lengths have been changed.     

STRUCTURE STUDIES OF [Et_4N]_4[Cu_8(i-mnt)_6] (i-mnt=S_2C=C(CN)_2) AND [Me_4N]_4[Cu_5Ag_3(i-mnt)_6]·H_2O

<正> [Me4N]6[Ag6(i-mnt)6].H2O(1),[Et4N]4[Cu8(i-mnt)6](2) and [Me4N]4-[Cu5Ag3(i-mnt)6].H2O(3)(i-mnt=S2C=C(CN)2) were synthesized. The crystal and molecular structure of the complex 1 was reported by us.The structure of the complex 2 was determined from single crystal X-ray diffraction data. [Et4N]4[Cu8(i-mnt)s] 2, Mr=1870.46, monoclinic, P21/n, a=14.724(6), b = 17.228(3), c=15.59(1)A,β= 100.75(7)°,V=3886.3A3;Z = 2,Dc= 1.598 g/cm3. Complex 3 has been characterized by ICP elemental analyses and IR spectrum.     

THE CRYSTAL STRUCTURE OF BIS(TETRAETHYLAMMONIUM)(μ-OXO)BIS[TRIPHENYL-THIOLATO-IRON(Ⅲ)],(Et_4N)_2[Fe_2O(SPh)_6]

<正> Fe_2OSsN_2C_(52)H_(70),Mr=1043.23,monoclinic, P21/a, a=18.121(3), b=15.249(3), c=20.369(4)A,β=102.49(8)°,V=5495(1)A3, Z=4, Dc=1.261g.cm-3,MoKα(λ =0.710691), μ=17.816mm-1, F(000)=2208. R=0.073 for 4374 observed reflections with I≥3.0σ(I). The structure of the anion contains a linear Fe-O-Fe unit, with mean Fe-O distance of 1.766(2)A. The coordination geometry about each iron atom is close to tetrahedral with the angles O-Fe-S and S-Fe-S being 115.3° and 103.1°, respectively.     

SYNTHESIS AND STRUCTURE OF[Et_4N]_3[FE_3(SPh)_3Br_3Cl_3]

<正> The title compound was synthesized and its structure solved. The formula is [Et4N]3[Fe3(SPh)3Br3Cl3]. M=1231.95, monoclinic, space group C2/c, a=24.569(4), b=13.504(2), c=18.348.(3)A, β=110.78(1)°, V=5691(3)A3, Z=4, Dm= 1.41, Dc=1.44-g/cm3. The flat structure of the anion has. a planar [Fe3S3] ring and three phenyl groups. Statistical distribution of chlorine and bromine atoms on two sides of the [Fe3S3] plane results in a C2 symmetry of the anion.     

CRYSTAL STRUCTURE OF (Et_4N)_4[Mo_2Fe_7S_8(SPh)_(12)]

<正> (Et4N)4[Mo2Fe7S8(SPh)12] : Mw=2670.3, triclinic, p1, a=12.775(4), b=13.076(3), c=20.576(4)A, α=80.00(2), β=81.39(2), γ=61.51(2)°, V=2966.3(14) A3, Z=1, D=1.494 gcm-3, R=0.077 for 4031 observed reflections. The complex was prepared by reactions of (Et4N)2[Fe4(SPh) 10] with (Et4N)2MoS4 in an ace-tonitrile solution. The structure of [Mo2Fe7S8(SPh)12]4- anion is a double-cubane-like configuration bridged by a Fe(SPh)6 group.     

SYNTHESIS AND CRYSTAL STRUCTURE OF （C5H5）2Ti（o—NHPhC6H4CO2）2

<正> Cp2Ti(o-NHPhC6H4CO2)2, Mr = 602. 54, space group C2/c, a = 33. 77(2), b = 12. 611(6), c=14. 486(9) A ,β=103. 28(4)°,V = 6004(5) (?)3,Z = 8, Dc= 1. 33gcm-1, MoKa(λ=0. 71069(?)) radiation, μ = 3. 21cm-1, F(000) = 2512e, R = 0. 066, Rw= 0. 085 for 2511 radiations. The Ti atom in the molecule is coordinated by two C5H5 groups and two monodentate carboxyl ligands in a distorted tetrahedral geometry with the bonds in the range of Ti-C = 2. 334 - 2. 41(?) ; Ti-O = 1. 914(5) and 1. 919(5)(?);and the bond angles O-Ti-O = 91. 7(2)°; (cent-C5H5)-Ti-(cent-C5H5) = 135. 9(6)°.     

CRYSTAL STRUCTURE OF W_4(μ_(3-)S)_4[S_2P(OEt)_2]_6

<正> W4S4 [S2P (OEt)2]6, Mr= 1974. 94, triclinic, P1, a = 14. 063 (5) , b = 16. 289(4), c= 13. 377(3) A ,α=92. 06 (2), β=95. 24(3), γ= 73. 06(2)°, V= 2919(3)A3,Z=2,DC=2. 18g/cm3, Moka radiation,λ =0. 71069A ,μ = 90. 64cm-1, F(000) = 1764,R=0. 053 and Rw = 0. 069 for 5422 reflections with I≥3σ(I).The title compound is comprised of a cubane-like cluster core [W4S4] in which every W atom is coordinated by six S atoms to form a distorted octahedron.