Mononuclear anionic formyl complexes; synthesis and properties
作者:J.C. Selover、Marianne Marsi、David W. Parker、J.A. Gladysz
DOI:10.1016/s0022-328x(00)83029-6
日期:1981.3
A series of kinetically unstable mononuclear anionicformylcomplexes have been prepared by the action of Li(C2H5)3BH on neutral metal carbonyl precursors. One of these, Li+[(CO)4Mn(COC6H5)(CHO)]−, is shown to decompose by a hydride transfer disproportionation mechanism involving the by-product (C2H5)3B.
通过Li(C 2 H 5)3 BH对中性金属羰基前体的作用,制备了一系列动力学不稳定的单核阴离子甲酰基配合物。其中之一Li + [(CO)4 Mn(COC 6 H 5)(CHO)] -表现为通过涉及副产物(C 2 H 5)3 B的氢化物转移歧化机理分解。
Synthesis and solvent dependent reactivity of chelating bis-N-heterocyclic carbene complexes of Fe(II) hydrides
作者:Sergey Zlatogorsky、Michael J. Ingleson
DOI:10.1039/c2dt12048h
日期:——
short reaction times compounds with empirical formula ((DIPPC)2CH2)Fe(H)(HB(R)3)·LiI (R = Et or sec-Bu) that function as a masked Fe(II)-dihydride are isolated. Whilst ((DIPPC)2CH2)Fe(H)(HB(R)3)·LiI was stable for days in Et2O, more polar solvents (MeCN, THF) led to formation of the carbene borane adducts ((DIPPC)2CH2)(BR3)2. The addition of CO or cyclo-heptylbromide to ((DIPPC)2CH2)Fe(H)(HB(R)3)·LiI
Observations on selectivity reversal during chiral auxiliary-directed asymmetric nucleophile additions to arene–manganese tricarbonyl complexes
作者:Anthony J. Pearson、Maria C. Milletti、Ping Y. Zhu
DOI:10.1039/c39950000853
日期:——
A study of hydride nucleophile reactions with η6-(2R, 5R)-dimethylpyrrolidinylbenzene–manganese tricarbonyl hexafluorophosphate 1 reveals an unexpected reversal of selectivity during addition of hydride to the diastereotopic meta carbons, which is explained on the basis of changes in transition state location as the reactivity of the nucleophile is varied.