Naphthyl-Based PCP Platinum Complexes. Nucleophilic Activation of Coordinated CO and Synthesis of a Pt(II) Formyl Complex
作者:Leonid Schwartsburd、Elena Poverenov、Linda J. W. Shimon、David Milstein
DOI:10.1021/om0700720
日期:2007.5.1
formation of the cationic carbonyl complex [(PCP)Pt(CO)]+BF4- (4), containing an electrophilic carbonyl ligand. The latter is attacked by nucleophiles (MeO- and H-) to give the platinum carbomethoxy complex 5 and a rare platinum formyl complex, 6. Stabilized by the bulky bis-chelating tridentate pincer-type system, the formyl complex 6 was isolated and characterized. Complex 6 is more stable than the previously
合成和表征了一系列基于萘基的PCP Pt(II)配合物。(PCP)PtCl(2)的单晶X射线研究表明,芳香族单元在每对2的分子之间堆叠。从氯化物抽象2在氮气气氛导致形成不饱和阳离子络合物[(PCP)的Pt] + BF 4 - (3),与金属中心由抗衡阴离子(稳定化3A)或通过溶剂(3B)。在CO气氛下从2中提取氯化物配体会导致阳离子羰基配合物[(PCP)Pt(CO)] + BF 4的形成-(4),含有亲电羰基配体。(MEO后者是由亲核试剂攻击-和H - ),得到铂配合物甲酯5和稀有铂甲酰基络合物,6。通过庞大的双螯合三齿钳型系统稳定,分离并鉴定了甲酰基复合物6。配合物6比先前报道的铂甲酰基更稳定。在室温下,络合物6缓慢地(几天内)转化为氢化物络合物7。