Reactions of the clusters [Os 3(CO) 10(MeCN) 2)] and [Ru 3(CO) 12] with (2-aminophenyl)phosphine P(2-NH 2C 6H 4)H 2. : A comparison of the reactivity of amino and phosphino groups with clusters

Abstract

The reaction of (2-aminophenyl)phosphine P(2-NH 2C 6H 4)H 2 with [Os 3(CO) 10(MeCN) 2] gives the compounds [Os 3(CO) 11{P(2-NH 2C 6H 4)H 2}] ( 1), [1,2-Os 3(CO) 10{P(2-NH 2C 6H 4)H 2} 2] ( 2) and [Os 3(μ-H)(CO) 10{μ-P(2-NH 2C 6H 4)H}] ( 3). Thermolysis of compounds 1 and 3 in cyclohexane affords in quantitative yields [Os 3(μ-H) 2(CO) 9{μ 3-P(2-NH 2C 6H 4)}] ( 4). However, the direct reaction of P(2-NH 2C 6H 4)H 2 with [Ru 3(CO) 12] yields only the nonacarbonyl species [Ru 3(μ-H) 2(CO) 9{μ 3-P(2-NH 2C 6H 4)}] ( 5). The phosphino group coordinates more favorably than the amino group and PH bond activation is favored over amino coordination.