Syntheses, Structures, and Reductive Elimination Studies of Six-Membered Diaryl Platinacycle Complexes
作者:Robert Robinson、Paul R. Sharp
DOI:10.1021/om901033z
日期:2010.3.22
(dppp), 4,4′-bis-tert-butyl-2,2′-bipyridine (tBu2bpy)), have been prepared from cis-PtL2Cl2 and the appropriate dilithio reagents. Reductive elimination studies on the platinacycles with L = PEt3 show that the bridging group (X) dramatically influences the reductive elimination rate. Thermodynamic activation parameters were determined for the platinacycles and showed a ΔH⧧ trend X = NMe ≪ O < CH2 with an
六元铂盐环化合物PtL 2(C 6 H 4 XC 6 H 4)(X = CH 2,O,NMe; L = PEt 3,L 2 = 1,3-双(二苯基膦基)丙烷(dppp),4,由顺式-PtL 2 Cl 2和适当的二硫代试剂制备了4'-双-叔丁基-2,2'-联吡啶(t Bu 2 bpy)。L = PEt 3的platinacycles的还原消除研究表明桥接基团(X)极大地影响了还原消除率。热力学激活参数被确定为platinacycles并呈现出Δ ħ ⧧趋势X = NME«0