title: C-H bond activation by unsymmetrical 2-(N-arylimino)pyrrolide Pt complexes: geometric effects on reactivity.
abstract: Reactions of chloroplatinum methyl complexes with N-(arylimino)pyrrolide anions afford cis and trans neutral platinum methyl complexes. Isomers with methyl trans to the pyrrolide nitrogen activate benzene C-H bonds at 85 degrees C more than 80 times faster than the corresponding cis isomer. In addition, reactions of platinum dimethyl complexes with N-(arylimino)pyrroles (Ar = 4-substituted phenyl) in C6D6 at ambient temperature give unlabeled methane and cis methyl complex containing heavily deuterated Pt-Me. In contrast, bulky aryl substituents give methane isotopomers and trans-Pt-Ph product. The origins of these observations are discussed.
authors.affiliation: Los Alamos Catalysis Initiative, Chemistry Division, MS J514, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. bakertom@lanl.gov
authors.forename: Carl N
authors.initials: CN
authors.lastname: Iverson
authors.forename: Charles A G
authors.initials: CA
authors.lastname: Carter
authors.forename: R Tom
authors.initials: RT
authors.lastname: Baker
authors.forename: John D
authors.initials: JD
authors.lastname: Scollard
authors.forename: Jay A
authors.initials: JA
authors.lastname: Labinger
authors.forename: John E
authors.initials: JE
authors.lastname: Bercaw