Novel six-coordinate oxorhenium(V) ‘3+2’ mixed-ligand complexes carrying the SNO/SN donor atom set
作者:F Mévellec、A Roucoux、N Noiret、H Patin
DOI:10.1016/s0020-1693(01)00797-6
日期:2002.4
Ligand exchange reactions of oxorhenium(V) precursors with bidentate SN and tridentate Schiff bases derived from the condensation of ketones or aldehydes with dithiocarbazic acid methyl ester (H2NNHC(S)SCH3) produce novel ‘3+2’ mixed-ligand complexes carrying the SNO/SN donor atom set. Thus, reactions of either [NBu4][ReOCl4] or Na[ReO(Gluconate)2] with SNO ligands (H2Ln) or a mixture of bidentate
配体oxorhenium(V)与二齿SN和三齿席夫碱从酮或醛与dithiocarbazic酸甲酯(H的缩合衍生的前体的交换反应2 NNHC(S)SCH 3)产生新颖“3 + 2带有SNO / SN供体原子集的混合配体络合物。因此,[NBu 4 ] [ReOCl 4 ]或Na [ReO(葡糖酸盐)2 ]与SNO配体(H 2 L n)或双齿SN(HL m)和三齿SNO(H 2 L n)的混合物反应在甲醇溶液中分别导致[ReO(L n)(HLÑ)]和[REO(L Ñ)(L米)],结合一个三齿双阴离子小号- NO -供体的席夫碱(L)和一个二齿阴离子小号- ñ供体配体(HL)。single周围的配位几何是扭曲的八面体,每个配体的两个SN供体原子组定义了赤道面,而顶端位置被三齿SNO配体(L)的氧代基团和氧原子占据,如单晶所示。 [ReO(L 1)(HL 1)] 1的X射线衍射结构。
Transmetalation of tetranuclear copper complexes with tin transmetalators. Molecular structure of cis-dichloro-bis(trans-S-methyl isopropylidenehydrazinecarbodithioato)tin(IV) and consideration of transmetalation mechanisms
作者:Atieh Abu-Raqabah、Geoffrey Davies、Mohamed A. El-Sayed、Ahmed El-Toukhy、Shahid N. Shaikh、Jon Zubieta
DOI:10.1016/s0020-1693(00)83796-2
日期:1992.3
Tin complexes Sn(NS)2Cl2(D) and Sn(NS)4(E) (NS is monoanionic S-methyl isopropylidenehydrazinecarbodithioate) are very good transmetalators of tetranuclearcopper(I) target [NCuCl]4 (I: N is N,N-diethylnicotinamide). An X-ray crystallographic study shows that D is cis-dichloro-bis(trans-S-methyl isopropylidenehydrazinecarbodithioato)tin(IV). Evidence that I reacts with 1 or 2 mol of D via strong precursors
Crystal and molecular structure of racemic fac-tris-(S-methylisopropylidene-hydrazinecarbodithioato)cobalt(III), Co(NS)3, and the kinetics of its isomerization in aprotic solvents
作者:Kay D. Onan、Geoffrey Davies、Mohamed A. El-Sayed、Ahmed El-Toukhy
DOI:10.1016/s0020-1693(00)84330-3
日期:1986.9
Abstract The crystal and molecularstructure of fac-tris- (S-methylisopropylidenehydrazinecarbodithioato)cobalt (III) is reported. The dark olive-green Co(NS)3 crystallizes in the monoclinic space group P21/c with Z = 4 in a cell of dimensions a = 17.876(2), b = 9.792(2), c = 14.816(2) A and β = 108.63(1)°. The coordination sphere is relatively undistorted but the cobalt atom does not lie in the center
Synthesis, spectroscopic and structural characterization of diphenyltin(IV) complexes of acetone Schiff bases of S-alkyldithiocarbazates
作者:Mohammad Akbar Ali、Aminul Huq Mirza、Malai Haniti S.A. Hamid、Paul V. Bernhardt、Olaniran Atchade、Xueqing Song、George Eng、Leopold May
DOI:10.1016/j.poly.2007.11.030
日期:2008.2
New diphenyltin(IV) complexes of empirical formula, [Sn(C6H5)2(NS)Cl] (NS = anionic forms of the acetone Schiff bases of S-methyl or S-benzyldithiocarbazate) have been prepared and characterized by IR, NMR and Mössbauer spectroscopic techniques. The crystal and molecularstructures of the acetone Schiff bases of S-methyldithiocarbazate (Hacsme) and S-benzyldithiocarbazate (Hacsbz) and their tin(IV)
制备了新的经验式为[Sn(C 6 H 5)2(NS)Cl]的二苯基锡(IV)配合物(NS = S-甲基或S-苄基二硫代氨基甲酸酯的丙酮席夫碱的阴离子形式),并通过红外光谱对其进行了表征,NMR和Mössbauer光谱技术。已经通过X射线衍射确定了S-甲基二硫代咔唑酸酯(Hacsme)和S-苄基二硫代咔唑酸酯(Hacsbz)及其锡(IV)配合物的丙酮席夫碱的晶体和分子结构。在固态下,两个席夫碱均以其硫代酮互变异构体形式存在,其中偶氮甲碱氮原子为反式硫酮硫原子,但在锡(四)配合物中,它们以去质子化的烯硫醇盐形式存在,并通过偶氮甲碱氮和硫醇盐硫原子与锡原子配位成二齿螯合剂。锡原子采用五坐标,近似三角双锥体的几何形状,席夫碱的硫醇盐硫原子和两个苯基占据赤道位置。偶氮甲碱氮原子和氯配体占据轴向位置。规则的三角双锥体或正方形锥体的几何形状引起的变形归因于五元螯合环的受限制的咬合尺寸。
Transmetalation of tetranuclear copper(I) complexes with an Fe(NS)3 reagent
作者:Geoffrey Davies、Mohamed A. El-Sayed、Ahmed El-Toukhy、Maher Henary
DOI:10.1016/s0020-1693(00)88018-4
日期:1990.2
reaction of I with M(NS)3 and M(NS)2 reagents (M = Co, Ni, Cu, Zn) decrease in the order Co(NS)3 (II) > IIa > M(NS)2. Products III′ react stoichiometrically with 1 mol of II or M(NS)2 or with 2 mols of II or M(NS)2 to give iron(III)-containing dimers N4MFe(OH)X4 (VIII′) and trimers N3M2Fe(OH)X4O (X′), respectively, after oxidation with dioxygen and isolation. Transmetalation of III′ with equimolar mixed transmetalators