Reactions of bis(cyclo-octa-1,5-diene)platinum with quinones; crystal structure of [Pt{η<sup>4</sup>-C<sub>6</sub>H<sub>2</sub>O<sub>2</sub>(Bu<sup>t</sup><sub>2</sub>-2,6)}(η<sup>4</sup>-C<sub>8</sub>H<sub>12</sub>)]
作者:Michael J. Chetcuti、Judith A. K. Howard、Michel Pfeffer、John L. Spencer、F. Gordon A. Stone
DOI:10.1039/dt9810000276
日期:——
Bis(cyclo-octa-1,5-diene)platinum reacts with benzo-1,4-quinone, 2,3,5,6-tetramethyl-, 2,6-dimethyl-, 2,6-di-t-butyl-, 2,5-dimethyl-, and 2,5-diphenyl-benzo-1,4-quinone to give complexes [Pt(quinone)(cod)](cod = cyclo-octa-1,5-diene). Carbon-13 n.m.r. studies on these compounds failed to establish whether the quinone ligands were η4 or η2 bonded to platinum, and so X-ray diffraction studies have been
双(环-八--1,5-二烯)铂与苯并-1,4-醌,2,3,5,6-四甲基-,2,6-二甲基-,2,6-二叔丁基反应-,2,5-二甲基-和2,5-二苯基-苯并-1,4-醌得到配合物[Pt(醌)(cod)](cod =环-辛-1,5-二烯)。碳13上,这些化合物NMR研究未能确立醌配体是否是η 4或η 2键合到铂等X射线衍射研究已经在2,3,5,6-四甲基-和2中进行,6-二叔丁基苯并-1,4-醌衍生物。尽管前者的晶体表现出一些障碍,防止该结构的完整的解决方案,可以推断的是,键合方式是η 4。2,6-二叔丁基苯并-1,4-醌配合物的晶体为单斜空间群P 2 1 / n,Z = 4,在具有晶格参数a = 10.652(5),b = 12.541(4),c = 14.971(4)Å和β= 93.17(3)°的晶胞中。该结构已被改进,以ř 0.025([R '0.027)在200K的收集4个258独立反射至2