Configurational rearrangements in cis-M(AA)2X2, cis-M(AA)2XY, and cis-M(AB)2X2 complexes. 5. The cis-M(AA)2X2 system - diastereotopic probe on the monodentate X ligands
作者:N. Serpone、D.G. Bickley
DOI:10.1016/s0020-1693(00)91664-5
日期:1979.1
(acac) 2 [phenoxo) 2 complexes, and isopropyl methyl group exchange (inversion) in the isopropyl-substituted phenoxo complexes Ti(acac) 2 (2- i PrC 6 H 4 O) 2 and Ti(acac) 2 (2,6- i Pr 2 C 6 H 3 O) 2 are reported. For the former exchange phenomena, activation energies (kcal/mol) and entropies of activation (eu) in CH 2 Cl 2 solutions are, respectively: 8.7 ± 0.5 and −15.7 ± 2.1 (2,6-Cl 2 C 2 H 3 O)
摘要分析了许多顺式-Ti-(acac)2 [phenoxo)2配合物中乙酰丙酮(acac)甲基的位点交换的总线形分析,以及异丙基取代的phenoxo配合物Ti(acac)中的异丙基甲基的交换(转化)。报道了2(2-i PrC 6 H 4 O)2和Ti(acac)2(2,6-i Pr 2 C 6 H 3 O)2。对于前一种交换现象,CH 2 Cl 2溶液中的活化能(kcal / mol)和活化熵(eu)分别为:8.7±0.5和-15.7±2.1(2,6-Cl 2 C 2 H 3 O ),10.4±0.6和-16.8±2.2(2-ClC 6 H 4 O),11.6±0.6和-13.2±2.0(2-IC 6- H 4 O),11.9±0.8和-13.7±2.6(4- ClC 6 H 4 O),11.9±0.6和-14.5±2.2(4- i PrC 6 H 4 O),12.5±0.4和-13.7±1