Reactions of Di(1-cyclohepta-2, 4, 6-trienyl)sulfane, S(C7H7)2, with Derivatives of the Hexacarbonyls, M(CO)6 (M = Cr, Mo, W)
摘要:
AbstractMononuclear carbonylmetal complexes of chromium, molybdenum and tungsten containing the sulfane S(C7H7)2 (1) have been obtained starting from precursors such as the THF‐stabilized pentacarbonylmetal fragments, [M(CO)5](thf), the acetonitrile intermediates M(CO)6‐x(CH3CN)x (x = 1, 2, 3) (M = Cr, Mo, W) or the η4‐norbornadiene complexes M(CO)4(C7H8) (M = Cr, Mo). In addition to the pentacarbonyls, M(CO)5[S(C7H7)2] (M = Cr (2a), Mo (2b), W (2c)) which contain 1 unchanged as a two‐electron sulfane ligand with two pending cyclohepta‐2, 4, 6‐trienyl substituents, isomeric complexes M(CO)5[S(CH2Ph)(C7H7)] (M = Cr (3a), W (3c)) were obtained at higher temperatures (40‐50 °C) in which one of the two organic groups has been transformed into a benzyl substituent. In the tetracarbonyls, cis‐M(CO)4[S(C7H7)(η2‐C7H7)] (M = Mo (4b), W (4c)), the ligand 1 serves as an olefinic sulfane four‐electron chelate ligand. The reaction of either Mo(CO)6 or (mesitylene)Mo(CO)3 with S(C7H7)2 (1) in boiling THF leads to the sulfur‐free ditropyl complex Mo(CO)3[(η6‐C7H7)‐C7H7] (5b, two isomers). The 1H and 13C NMR spectra of the new complexes 2‐4 reveal various dynamic processes including pyramidal inversion of the sulfur atom and [1, 7]‐sigmatropic shifts at the C7H7 ring. The molecular structures of 2c, 3a, 4b and 4c have been determined by X‐ray crystallography.
Ditropylmolybdenum complexes by the sodium reduction of [Mo(CO)3(η-C7H7)][BF4]. X-Ray crystal structure of the ditropyl complex “Mo(CO)3”2(η6,η′6-C14H14)
作者:Harry Adams、Neil A. Bailey、David G. Willett、Mark J. Winter
DOI:10.1016/s0022-328x(00)99031-4
日期:1987.10
Treatment of [Mo(CO)3(η-C7H7)][BF4] with either sodium amalgam or sodium naphthalide results in a reductive dimerisation to the ditropyl complex “Mo(CO)3”2(η6,η′6-C14H14). The results of an X-ray crystallographic study confirm that the hydrogen atoms of the linking carbon atoms are both endo with respect to molybdenum. The reaction of Mo(CO)6 with ditropyl, C14H14, leads to all three possible isomers
[沫(CO)的治疗3(η-C 7 H ^ 7)] [BF 4 ]与在还原二聚到ditropyl复合物“的Mo(CO)或者钠汞齐或萘基钠结果3 ” 2(η 6,η ′ 6 -C 14 H 14)。X射线晶体学研究的结果证实,连接的碳原子的氢原子都相对于钼是内在的。Mo(CO)6与对苯二酚C 14 H 14的反应生成“ Mo(CO)3 ” 2(η6,η' 6 -C 14 -H 14)。每种的结构由其1 H NMR谱确定。