Complexes of C-Donors

Alkyl compounds can be synthesized by substitution, oxidative addition and 

The structures of the series tra j-Pt(PMePh2)2RCl (R = Me, CF2CF3) show Pt—C bonds of 2.081 and 2.013 A, respectively, with the electron-withdrawing fluoroalkyl leading to a shorter and stronger bond. (Data for some other platinum alkyls are discussed in section 3.8.10.) 

Isomerization and elimination reactions of alkyls and aryls Isomerizations of mono-alkyls and aryls have been widely studied [107] many cw-Pt(PR3)2ArCl undergo rapid isomerization in the presence of free phosphine, a reaction inhibited by Cl with a mechanism believed to involve a 3-coordinate Pt(PR3)2Ar intermediate that is then attacked by Cl . The cis- and tranj-isomers of Pt(PEt3)2(Ph)Cl undergo reversible isomerization when irradiated at the wavelength of charge-transfer transitions (254 and 280 nm). 

A dissociative mechanism is indicated by the fact that excess phosphine inhibits elimination from molecules like c -Pd(PPh3)2Me2 and Pt(PPh3)2Bu2. On thermolysis of mixtures where one molecule contains deuterium, such as 

Alkyls with groups that cannot / -eliminate (Me, CH2SiMe3) are more stable than those that can (e.g. ethyls). 7 an5-complexes that cannot eliminate by reductive coupling may -eliminate  

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