Molybdenum and tungsten complexes of the N(CH2CH2S)33− (NS3) ligand with oxide, sulfide, diazenide, hydrazide and nitrosyl co-ligands
作者:Sian C. Davies、David L. Hughes、Raymond L. Richards、J. Roger Sanders
DOI:10.1039/a908777j
日期:——
Reaction of [MoO2(acac)2] with N(CH2CH2SH)3 in CH2Cl2 gave an insoluble, red, diamagnetic complex formulated as [MoO(NS3)}2] 1 [NS3 = N(CH2CH2S)33â] together with a small amount of dark red, diamagnetic [Mo(NS3)}2(μ-S)] 2. The linear, sulfur-bridged structure of 2 was confirmed by a crystal structure determination. With NH2NHR (R = Me or Ph) in CH2Cl2, 1 gave soluble, red, diamagnetic diazenides [Mo(NS3)(N2R)] (R = Me 3 or Ph 4) whereas with N2H4 it gave a dark brown, insoluble compound formulated as [Mo(NS3)(N2H)}n] 5. The crystal structures of 3 and 4 have been obtained. Both 3 and 4 react with mineral acids HX (X = BF4 or Cl) in CH2Cl2 to give the yellow-brown, diamagnetic hydrazides [Mo(NS3)(N2HR)]X (6, R = Me, X = BF4; 7, R = Me, X = Cl; 8, R = Ph, X = BF4), which deprotonate in more basic solvents to regenerate the parent complexes. Compound 3 reacted with [Me3O]BF4 to give yellow, diamagnetic [Mo(NS3)(N2Me2)]BF49 and with NO to give yellow, diamagnetic [Mo(NS3)(NO)] 10, whose crystal structure shows it to have a linear MoNO system. Reaction of N(CH2CH2SH)3 with [Mo(μ-Br)Br(CO)4}2] and [WI2(CO)3(MeCN)2] gave the poorly soluble, diamagnetic complexes [M(NS3)}2μ-SCH2CH2N(CH2CH2SH)2-S}2] (M = Mo 11 or W 12) whose structures have been established by determination of the crystal structure of 12.
在CH2Cl2中,[MoO2(acac)2]与N(CH2CH2SH)3反应生成了一种不溶性的红色、抗磁性配合物[MoO(NS3)}2] 1 [NS3 = N(CH2CH2S)33−],以及少量的深红色、抗磁性[Mo(NS3)}2(μ-S)] 2。通过晶体结构测定证实了2的线性硫桥结构。在CH2Cl2中,与NH2NHR(R = Me或Ph)反应,1生成可溶性的红色、抗磁性重氮化合物[Mo(NS3)(N2R)](R = Me 3或Ph 4),而与N2H4反应则生成一种深棕色、不溶性化合物[Mo(NS3)(N2H)}n] 5。已经获得了3和4的晶体结构。3和4都能与无机酸HX(X = BF4或Cl)在CH2Cl2中反应,生成黄棕色、抗磁性酰肼[Mo(NS3)(N2HR)]X(6,R = Me,X = BF4;7,R = Me,X = Cl;8,R = Ph,X = BF4),这些酰肼在更碱性的溶剂中脱质子再生出母体配合物。化合物3与[Me3O]BF4反应生成黄色、抗磁性[Mo(NS3)(N2Me2)]BF4 9,与NO反应生成黄色、抗磁性[Mo(NS3)(NO)] 10,其晶体结构显示具有线性MoNO体系。N(CH2CH2SH)3与[Mo(μ-Br)Br(CO)4}2]和[WI2(CO)3(MeCN)2]反应生成难溶的抗磁性配合物[M(NS3)}2μ-SCH2CH2N(CH2CH2SH)2-S}2](M = Mo 11或W 12),通过12的晶体结构测定确定了其结构。