Synthesis and Reactivity of Platinum(II) <i>cis</i>-Dialkyl, <i>cis</i>-Alkyl Chloro, and <i>cis-</i>Alkyl Hydrido Bis-<i>N</i>-heterocyclic Carbene Chelate Complexes
作者:Matthias Brendel、René Engelke、Vidya G. Desai、Frank Rominger、Peter Hofmann
DOI:10.1021/acs.organomet.5b00204
日期:2015.6.22
synthesized. The reactivity of the dimethyl complexes toward dichloromethane and methanol was investigated. Reductive elimination of alkanes from cis-alkyl hydrido complexes requires much higher temperatures than in related bisphosphine systems, which limits their applicability for the generation of reactive, bent platinum(0) d10-ML2 fragments for bond-activation chemistry. The platinum(II) complexes were
铂(II)的顺式-二甲基和顺式-二新戊基络合物轴承烷基取代的双- NHC配体L吨-Bu,L我和L我-Pr(L吨-Bu = 1,1'-二-叔丁基-3,3'- methylenediimidazolin -2,2'-二亚基,L我= 1,1'-二甲基-3,3'- methylenediimidazolin -2,2'-二亚基,L我-Pr = 1,1'-二异丙基-3,3'-亚甲基二咪唑啉-2,2'-二亚甲基)以及新型的顺式烷基氯和顺式合成了烷基氢化物。研究了二甲基配合物对二氯甲烷和甲醇的反应性。与相关的双膦系统相比,从顺式-烷基氢化物络合物中还原性消除烷烃需要更高的温度,这限制了它们在键合活化化学反应中产生反应性弯曲铂(0)d 10 -ML 2片段的适用性。在大多数情况下,铂(II)配合物的特征在于NMR和IR光谱,质谱,元素分析和X射线衍射。