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The Reaction of Unactivated Cobalt Powder with Iodophosphoranes. The Synthesis of [Co(PMe 3 ) 2 I 3 ] and the Isolation of the “Frozen Transition‐State” Complex [( n Bu 3 PI) 2 (μ‐I)] [( n Bu 3 PI)(μ‐I)CoI 3 ]
Author(s) -
McAuliffe Charles A.,
Godfrey Stephen M.,
Mackie Anthony G.,
Pritchard Robin G.
Publication year - 1992
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199209191
Subject(s) - cobalt , trigonal bipyramidal molecular geometry , chemistry , transition metal , metal , alkyl , crystallography , reaction mechanism , inorganic chemistry , stereochemistry , crystal structure , catalysis , organic chemistry
The alkyl substituents at the iodophosphorane determine the nature of the product formed in reactions with cobalt powder. Whereas Co and Me 3 PI 2 react to give the trigonal‐bipyramidal cobalt( III ) complex 1 , the reaction between Co and n Bu 3 PI 2 halts at the very unusual cobalt( II ) compound 2 . The structure of 2 , which corresponds to a possible transition state in the formation of 1 , provides an insight into the mechanistic pathway for the reaction of metal powders with dihalogen phosphoranes.