title: Multinuclear NMR studies of the products resulting from the reaction of pyridine or 2,2'-bipyridine with [Rh4(CO)12].
abstract: The progressive addition of anhydrous pyridine, (py), to a solution of [Rh(4)(CO)(12)] in CH(2)Cl(2) under CO, even at low temperature, results in immediate disproportionation to give cis-[Rh(CO)(2)py(2)][Rh(5)(CO)(15)]; further addition of pyridine results in the progressive replacement of CO's by py on the same apical rhodium in [Rh(5)(CO)(15)](-) to give cis-[Rh(CO)(2)py(2)][Rh(5)(CO)(15-x)py(x)] (x = 1, 2). The analogous reactions with 2,2'-bipyridine (bipy) give only [Rh(CO)(2)bipy][Rh(5)(CO)(13)bipy]. IR and low temperature, multinuclear NMR measurements have been used to establish the structures of all the above anions and the structures of [Rh(5)(CO)(13)(bipy)](-) and [Rh(5)(CO)(13)py(2)](-) are subtly different. Under N(2), [Rh(4)(CO)(12)] reacts with py to give [Rh(6)(CO)(16-y)py(y)] (y = 1, 2).
authors.affiliation: Chemistry Department, University of Liverpool, UK.
authors.forename: Kerry J
authors.initials: KJ
authors.lastname: Bradd
authors.forename: Brian T
authors.initials: BT
authors.lastname: Heaton
authors.forename: Jonathan A
authors.initials: JA
authors.lastname: Iggo
authors.forename: Chacko
authors.initials: C
authors.lastname: Jacob
authors.forename: Jeyagowry T
authors.initials: JT
authors.lastname: Sampanthar
authors.forename: Stefano
authors.initials: S
authors.lastname: Zacchini