Stereoelectronic Factors That Influence Kinetic and Thermodynamic Sites of Protonation of (η<sup>6</sup>-Arene)molybdenum(phosphine)<sub>3</sub> Complexes
作者:Michael T. Ashby、Victor S. Asirvatham、Angela S. Kowalski、Masood A. Khan
DOI:10.1021/om990281n
日期:1999.11.1
We have previously reported (J. Am. Chem. Soc. 1995, 117, 12639) the arene complex (η6-C6H6)Mo(TRIPOD) (1), where TRIPOD = 1,1,1-tris(diphenylphosphinomethyl)ethane, is protonated upon addition of 1 equiv of D+ to yield the metal−hydride [(η6-C6H5D)Mo(TRIPOD)H]+ (1H+-d1) via exo addition of D+ to the arene ligand followed by migration to the metal of the endo proton of the putative η5-cyclohexadienyl
我们以前曾报道(J.化学会会志。 1995,117,12639)的芳烃络合物(η 6 -C 6 H ^ 6)的Mo(三脚架)(1),其中TRIPOD = 1,1,1-三(二苯基膦甲基)乙烷,是在加入1个当量的d的质子+,得到金属-氢化物[(η 6 -C 6 H ^ 5 d)的Mo(三脚架)H] +(1H +-d 1)通过外切加成d的+向芳烃配体,随后迁移到所述的金属内的质子的推定η 5 -cyclohexadienyl络合物[(η 5 -C 6 ħ 6 d)的Mo(三脚架)] +(1 ‡)。相反同位素时获得(η 6 -C 6 d 6)钼(三脚架)(1-d 6)被用来得到[(η 6 -C 6 d 5 1H)沫(三脚架)d] +(1D +-d 6)。我们最近的电子结构的调查1和它的单电子氧化的衍生物[(η 6 -C 6 H ^ 6)的Mo(三脚架)] +(1 +)暗示质子化机制并非完全由电子因素驱动;