The reaction of Os 3(CO) 12 with Ph 3SnH yielded the bimetallic Os-Sn cluster complexes Os 3(CO) 11-(SnPh 3)(μ-H) (16) and Os 3(CO) 9(μ-SnPh 2) 3 (17) in 20 and 21% yields, respectively. Compound 16 consists of an Os 3 triangle with a terminal SnPh 3 group on one of the Os atoms and a bridging hydrido ligand across one of the Os-Os bonds. Compound 17 consists of a central Os 3 triangle with SnPh 2 groups bridging each of the three Os-Os bonds. Pt(PBu 3 t) 2 reacts with compound 17 to afford Os 3(CO) 9[Pt-(PBu 3 t)](μ-SnPh 2) 3 (18), a Pt(PBu 3 t) adduct of 17, in 29% yield by adding a Pt(PBu 3 t) group across one of the Os-Sn bonds. The osmium and tin atoms lie in a plane, while the Pt(PBu 3 t) group is displaced slightly out of that plane. Pt(PPh 3) 4 reacts with 17 to give the cluster complex Os 3(CO) 9[Pt(Ph)(PPh 3) 2](μ-SnPh 2) 2(μ 3-SnPh) (19) in 21% yield by insertion of a Pt(PPh 3) 2 into one of the Sn-C bonds to one of the phenyl groups. The osmium and tin atoms are coplanar, and there is a Pt(Ph)(PPh 3) 2 group terminally bonded to one of the tin atoms. The platinum atom of the Pt(Ph)(PPh 3) 2 group has a square-planar geometry with the two PPh 3 ligands in cis coordination sites. All new products were characterized crystallographically by single-crystal X-ray diffraction techniques.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry