Synthesis, structure, vibrational spectra and chemical properties of the triangular molybdenum and tungsten complexes M3(μ3-S)(μ2-SSe)3X62− (M = Mo, W; X = Cl, Br)
the Mo3 triangle. The SSe distances are 2.157(5)–2.163(4) A. ComplexI is the first compound containing a SSe ligand that has been structurally characterized. IR and Raman spectra of M3S4Se3X62− have been studied. For Mo3S4Se3Cl62− an analysis of the normal vibrations has been performed. The force constant of the SSe bond in complexI is 2.3 mdyn/ A. Heating of (Et4N)2Mo3S4Se3Br6 under vacuum at
The reactivity of complexes containing the [Mo3(μ3S)(μS2)3]4+ core. Ligand substitution, sulfur elimination and sulfide binding
作者:Marc D. Meienberger、Kaspar Hegetschweiler、Heinz Rüegger、Volker Gramlich
DOI:10.1016/s0020-1693(00)83826-8
日期:1993.11
5-tris(dimethylamino)- cis -inositol. The complexes were characterized by one- and two-dimensional NMR spectroscopy and FAB mass spectrometry. In the presence of a weak base and 6-mercaptopurine (Hmp) or 8-hydroxyquinoline (Hoxq), the six Br atoms were replaced by these bidentate ligands forming [Mo 3 S(S 2 ) 3 (oxq) 3 ] + and [Mo 3 S(S 2 ) 3 (mp) 3 ] + . In addition, the three oxq ligands could be quantitatively
在溶液中研究了含有[Mo 3(μ3 S)(μS2)3] 4+核的配合物的反应性。两种类型的亲电子中心,(i)三个Mo原子,(ii)三个赤道(平面内)和(iii)三个轴向(平面外)硫原子与二亲核试剂的相互作用明显不同。通过使用(),选择性反应可以特异性合成含有[Mo 3(μ3 S)(μS2)3] 4+或[Mo 3(μ3 S)(μS)3] 4+核的新配合物。 NEt 4)2 [Mo 3 S(S 2)3 Br 6]作为起始原料。硫提取和配体取代的组合导致形成[Mo 3 S 4 L 3] 4+的复合物,其中L代表三齿N,O供体1,3,5-三氨基-1,3,5 -三甲氧基-顺式肌醇和1,3,5-三甲氧基-1,3,5-三(二甲基氨基)-顺式肌醇。通过一维和二维NMR光谱法和FAB质谱法对络合物进行表征。在弱碱和6-巯基嘌呤(Hmp)或8-羟基喹啉(Hoxq)的存在下,六个Br原子被这些双齿配体取代,形成[Mo
of W 3 S 7 Br 4 , with a KNCS melt or an aqueous solution of (NH 4 ) 2Sx involves transformation of the cluster fragment W 3 S 7 4+ to a W 3 S44+ fragment to produce W 3 S4 (NCS) 9 5− and W 3 S4 (S4 ) 3 (NH 3 ) 3 2− complexes. The structure of (NH 4 )(H)(H2 O) 3 W 3 S 16 (NH 3 ) 3 ( VI ) was established by X-ray diffraction analysis. The crystals of VI are trigonal, a =12.508(1), c =10.112(1)
摘要开发了由金属钨或WS 3合成钨W 3 S 7 X 4(XCl,Br)的三角形硫代卤化物配合物的方法。已经发现了将这些聚合物配合物转化为三角形的W 3 S 7 X 6 2-配合物的方法,该W 3 S 7 X 6 2-保留了W 3(μ3 -S)(μ2 -S 2)3 4+簇片段的结构。在Et 4 NX存在下,在PPh 4 X熔体中或在浓酸HX中加热W 3 S 7 X 4,得到W 3 S 7 X 6 2-(XCl,Br )。通过X射线衍射分析确定了(Ph 4 P)2 W 3 S 7 Br 6(III)的结构。III的晶体是正交晶体,a = 18.082(2),b = 25.834(3),c = 27.370(2)A,Z = 8,Pbca,R(Rw)= 0.049(0.055)。已经获得了W 3 34 S 7 Br 6 2-的Et 4 N +盐,并且已经对W 3 S 7 Br 6 2-进行了正常振动的计算。W
Heteroleptic bipyridine complex: Synthesis, spectral and structural analyses, and interconversion of its {Mo3S7} core to {Mo3S4} core
responsible for strong halogen bonding interaction with three sulfur atoms of the cluster. The complex is formulated as [Et4N][Mo3(μ3-S)(μ-S2)3Br4(bpy).Br].CH3CN (1). Complex 1 contains a Mo3S7} core and its treatment with excess triphenyl phosphine (PPh3) generates neutral complex 2 containing a Mo3S4} core. Complex 2 (Mo3(μ3-S)(μ-S)3Br4(bpy)(PPh3)3) can reversibly transform to its parent compound 1 when
Reactivity of the [Mo<sub>3</sub>(<i>μ</i><sub>3</sub>-S)(<i>μ</i><sub>2</sub>-S<sub>2</sub>)<sub>3</sub>Br<sub>6</sub>]<sup>2</sup><sup>-</sup> Anion toward the Imidodiphosphinochalcogenido Ligands [N(<i>Q</i>PPh<sub>2</sub>)<sub>2</sub>]<sup>-</sup> (<i>Q</i> = S, Se): Synthesis and Characterization of [Mo<sub>3</sub>(<i>μ</i><sub>3</sub>-S)(<i>μ</i><sub>2</sub>-S<sub>2</sub>)<sub>3</sub>{N(<i>Q</i>PPh<sub>2</sub>)<sub>2</sub>}<sub>3</sub>]Br
作者:Virginie Béreau、Christopher G. Pernin、James A. Ibers
DOI:10.1021/ic9907056
日期:2000.2.1
Reactions of imidodiphosphinochalcogenido ligands [N(QPPh(2))(2)](-) (Q = S, Se) with [Mo-3(mu(3)-S)(mu(2)-S-2)(3)-Br-6](2-) (1) afford the first Mo complexes of such ligands: [Mo(mu(3)-S)(mu(2)-S-2)(3)N(SPPh2)(2)}(3)]Br (2) and [Mo-3(mu(3)-S)(mu(2)-S)(3)N(SePPh2)(2)}(3)]Br (3). In these compIexes the [Mo-3(mu(3)-S)(mu(2)-S-2)(3)](4+) core is maintained and three [N(QPPh(2))(2)](-) ligands are bound to the Mo atoms in a Q,Q-bidentate fashion.