Some iridium hydride and tetrahydroborate complexes with bulky tertiary phosphine ligands
- 1 January 1976
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 20,p. 2069-2074
- https://doi.org/10.1039/dt9760002069
Abstract
Iridium trichloride reacts with PBut 2Ph or PBut 3(L) in propan-2-ol to give five-co-ordinate dihydrides [IrClH2L2]. The complex [IrClH2(PBut 2Ph)2] reacts with sodium iodide to give [IrH2I(PBut 2Ph)2] or with carbon monoxide to give [Ir(CO)ClH2(PBut 2)Ph)2]. With dihydrogen and sodium propan-2-olate, [IrClH2L2] give the correspondlng pentahydrides [IrH5L2]. Hydrides of the type [IrCl3–xHx(PRBut 2)2](a)x= 1, R = Me, or (b)x= 2, R = But react with sodium tetrahydroborate to give complexes [Ir(BH4)H2(PRBut 2)2]. These are non-fluxionbl and have been characterized by 1H, 31P, and 11B n.m.r. spectroscopy. The complexes [Ir(BD4)H2(PBut 3)2] and [Ir(BD4)DH(PMeBut 2)2] have also been prepared by Li[BD4] reductions. The complex [Ir(BH4)H2(PMeBut 2)2] decomposes slowly in deuteriotoluene to [IrH5(PMeBut 2)2] but [Ir(BH4)H2(PButt 3)2] seems to be indefinitely stable.Keywords
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