Ligand redistribution reactions of tris(3,5-dimethylpyrazolyl)hydroboratomagnesium alkyl derivatives: crystal structure of {η3-HB(3,5-Me2pz)3}2Mg
作者:Runyu Han、Gerard Parkin
DOI:10.1016/0022-328x(90)85177-z
日期:1990.9
ium alkyl derivatives η3-HB(3,5-Me2pz)3}-MgR (3,5-Me2pz = 3,5-C3N2Me2H; R = CH3, CH2CH3, (CH2)3CH3, CH(CH3)2, C(CH3)3, CHCH2, C6H5) undergo ligand redistribution reactions, analogous to the Schlenk equilibrium, to give the bis complex η3-HB(3,5-Me2pz)3}2Mg. In contrast, magnesium alkyl derivatives of the more sterically demanding tris(3-t-butylpyrazolyl)hydroborato ligand, η3-HB(3-Butpz)3}MgR (3-Butpz
三(吡唑基)hydroboratomagnesium烷基衍生物η 3 -HB(3,5--ME 2 PZ)3 } -mgr(3,5--ME 2 PZ = 3,5-C 3 Ñ 2我2 H; R = CH 3,CH 2 CH 3,(CH 2)3 CH 3,CH(CH 3)2,C(CH 3)3,CHCH 2,C 6 H ^ 5)经历配体再分配反应,类似于舒伦克平衡,以得到双复杂η 3 -HB(3,5--ME 2pz)3 } 2 Mg。相反,更多空间要求的三烷基镁衍生物(3-叔butylpyrazolyl)hydroborato配体,η 3 -HB(3-卜吨PZ)3 } MGR(3-卜吨PZ = 3-C 3 Ñ 2卜吨ħ 2),是相对于η的形成稳定的3 -HB(3-卜吨PZ)3 } 2的Mg。