Darstellung und Eigenschaften von und Reaktionen mit metallhaltigen Heterocyclen. LXXIV. Synthese, Eigenschaften und Struktur von (η2-Phosphandiylphosphinito)cobalt-Komplexen des Typs (OC)2LCo(η2-PR21PR2)

Article abstract of DOI:10.1016/0022-328X(91)83052-6

Highly nucleopnilic phosphidocobaltates Li2 (2a,b) (L = CO (a), PPh3 (b)) are obtained in a one-pot synthesis following the sequence Co2(CO)6L2 -> K -> HCo(CO)3L -> HCo(CO)2(L)PPh2H (1a,b) -> 2a,b.Reaction of compounds 2a,b with dichloroorganylphosphines RPCl2 affords the title complexes L(OC)2Co(η²-Ph2P<*>PR) (3a,b, 4a,b, 5b, 6b) (R = 2,4,6-(^tBu)3C6H2 (3), ^tBu (4), Cy (5), Ph (6), the stability of which depends on the overall steric bulk, affected by the metal-bound ligands and the organic substituent R.According to an X-ray structural analysis 3a crystallizes in the triclinic space group P<*>1 with Z = 2 and has a short P-P bond together with a long Co-PR bond reflecting the particular bonding situation of the phosphinediylphosphinito ligand.