Transcription of The 16 and 18 Electron Rule in Organometallic Chemistry ...
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The 16 and 18 Electron Rule in Organometallic Chemistry ...
The 16 and 18 Electron Rule in Organometallic Chemistry and Homogeneous Catalysis By C. A. Tolman c E N T RA L R E S E A R C H DEPARTMENT* E X P E R I M E N T A L STATION, E. I . D U P O N T D E N E M O U R S A N D C O M P A N Y , W I L M I N G T O N , D E L A W A R E 1 9 8 9 8 , 1 Introduction There has been a great increase in interest and activity in recent years in organo- metallic Chemistry , especially in the area of homogeneous catalysis by transition- metal complexes. A number of publications have appeared dealing with par- ticular Organometallic reactions which occur in catalysis, such as oxidative addition,lJ insertion,, ligand e~change,~ and reactions of complexes with Lewis few authors have attempted to outline the principles of catalysis more There appears, however, to be
called the 16 and 18 Electron Rule. Careful subsequent study has almostinvari- ably shown that the original formulation was incorrect. The accessibility of 16 and 18 electron configurations also has important consequences for mechanisms of organometallic reactions, as outlined below.
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