TRITERTIARY ARSINE TRICARBONYL COMPLEXES OF CHROMIUM, MOLYBDENUM AND TUNGSTEN AND THEIR REACTIONS WITH HALOGENS.
Abstract
The hexacarbonyls of chromium, molybdenum and tungsten react with the tritertiary arsine, bis(odimethylarsinophenyl)methyl arsine, (TTAS), (I) to form stable tri-carbonyl metal (M) complexes of the type (M(CO)3(TTAS)). The action of halogens upon these complexes was investigated. Two gram atoms of bromine or iodine are consumed per mole of complex yielding salts of the type (M(CO)3(TTAS)X)X, in which the metal atom is presumably seven-coordinate. The stability of these salts in solution decreases in the order M = W > Mo > Cr; the tungsten (II) complex is fairly inert, losing carbon monoxide only very slowly whereas the molybdenum (II) compound loses one mole of carbon monoxide on warming in methanol to form the non-electrolyte species (Mo(CO)2(TTAS)X2(o). The chromium (II) complex readily undergoes further oxidation with complete loss of carbon monoxide to form complexes of the type (Cr(TTAS)X3) where X = Br and I; the trichloro- complex was made by a different procedure. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1964
- Accession Number
- AD0608763
Entities
People
- C. D. Cook
- M. L. Tobe
- R. S. Nyholm
Organizations
- University College London