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Neutral Cobalt Carbonyl Catalysts for the Equilibration Between CO and P(OPh) 3 Ligands in Carbonylcobaltates
Author(s) -
Ciuffarin Ennio,
Fachinetti Giuseppe,
Funaioli Tiziana,
Isola Mauro
Publication year - 1995
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.19950010406
Subject(s) - disproportionation , cobalt , catalysis , chemistry , substitution (logic) , medicinal chemistry , inorganic chemistry , organic chemistry , philosophy , linguistics
The substitution reaction of [Co(CO) 4 ] − by P(OPh) 3 was investigated in THF. Under a CO atmosphere, the reaction consists of an equilibrium, which, in order to be established, needs [Co 2 (CO) 6 (P(OPh) 3 ) 2 ]. The catalysis by this neutral carbonyl is formally related to a previously reported case, where either [Co 2 (CO) 8 ] or [Co 4 (CO) 12 ] was found to be necessary for the 13 CO scrambling in [Co(CO) 4 ] − . The kinetic analysis reported in this paper indicates, however, that the two CO labilizations differ in their mechanism‐the substitution by P(OPh) 3 is ascribed to a disproportionation‐synproportionation of [Co 2 (CO) 6 (P(OPh) 3 ) 2 ].