ISSN:
1042-7163
Schlagwort(e):
Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
Addition of four equivalents of t-butyldiallylphosphine 1a to a solution of one equivalent of [(COE)2IrCl]2 in CHCl3 at low temperature produced two isomers of thecomplex [t-Bu(C3H5)PCH2CH=CH)]IrHCl(COE)-[PtBu(C3H5)2] (2a), which evolve at 40°C to [t-Bu(C3H5)PCH2CH=CH)]IrCl(C8H15)[PtBu(C3H5)2] (3a), by a hydride transfer from iridium to the cyclooctene (COE) ligand. It is reasonable that the unsaturation at the iridium center is fulfilled by interactions with the allyl moieties of the phosphine that are not metalated. This has been demonstrated by bubbling CO into a solution of 3a in CHCl3 at room temperature to obtain the carbonyl complex [t-Bu(C3H5)-PCH2CH=CH)]Ir(CO)Cl(C8H15)[PtBu(C3H5)2] (4a). Under the same conditions, the reaction of diisopropylamindiallylphosphine 1b and anisyldiallylphosphine 1c afforded a mixture of isomers 3b and 3c, respectively. These results show that diallylphosphines can be considered to be a new family of bidentate ligands. Finally, the reaction of these phosphines with [(COD)IrCl]2 (COD = 1,5 cyclooctadiene) shows the formation of tetracoordinated iridium (I) complexes IrCl(COD)(PR3), which are thermally stable. © 1998 John Wiley & Sons, Inc. Heteroatom Chem 9:253-259, 1998
Zusätzliches Material:
8 Ill.
Materialart:
Digitale Medien
