Formation of a σ-cyclobutyl-platinum bond by the intramolecular activation of a cyclobutylphosphine. Synthesis and structure of
作者:Barbara L. Simms、James A. Ibers
DOI:10.1016/0022-328x(87)80294-2
日期:1987.8
for R(F2) is 0.075 for the 2403 unique data (including F02 < 0). Bond lengths in the five-membered chelate ring (11) are PtP 2.198(4), PC(3) 1.875(18). C(3)C(10) 1.53(2), C(10)C(11) 1.57(2), C(11)Pt 2.079(17) Å. The remaining cyclobutyl bond distances are C(11)C(12) 1.56(2), C(12)C(13) 1.51(3), C(10)C(13) 1.53(3) Å. The PtBr bond distances are 2.510(2) and 2.612(2) Å for bromine cis- and trans-
当二叔丁基环丁基甲基膦的氢溴酸盐加合物时,P(t-Bu)2(CH 2 H 2)·Hbr与K [PtCl 3(C 2 H 4)]和LiBr在乙醇中混合,并加热回流5 h,形成σ-环丁基络合物。该复合物也由沸腾的乙醇形成。由光谱和分析数据推导其结构,并通过单晶的X射线分析证实。在四方晶系的结晶复合物在空间群Ç 12 4ν -余4 1 CD(一个= b = 19.658(7),Ç - 15.805(6),甲= 113 K),每个晶胞有8个分子。对于2403个唯一数据(包括F 0 2 <0),R(F 2)的最终一致性指数为0.075 。五元螯合环(11)中的键长为PtP2.198(4),PC(3)1.875(18)。C(3)C(10)1.53(2),C(10)C(11)1.57(2),C(11)Pt2.079(17)Å。其余的环丁基键距离为C(11)C(12)1.56(2),C(12)C(13)1