Complexes of the platinum metals. Part 32. Synthesis and chemistry of some iridium sulphonate derivatives
- 1 January 1987
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 4,p. 947-952
- https://doi.org/10.1039/dt9870000947
Abstract
Sulphonic acids RSO3H (R = CF3, CH3, or C6H4CH3-p) react with mer-[IrH3(PPh3)3], [IrCl(CO)(PPh3)2], and [IrH (CO)(PPh3)3] to afford the products [IrH2(O3SR)(PPh3)3], [IrH(Cl)(O3SR)(CO)(PPh3)2], and [lrH2(CO)(PPh3)3][O3SR] respectively. Under more vigorous conditions the last reaction yields the bis(sulphonate) complexes [IrH(O3SR)2(CO)(PPh3)2]. The lability of the monodentate sulphonate ligands has been demonstrated by the substitution reactions of [lrH2(O3SR)(PPh3)3] with a variety of neutral donor ligands. Products readily obtained in this manner include [IrH2(CH3CN)(PPh3)3][O3SR], [IrH2L2(PPh3)2][O3SR][L = pyridine, 4- methylpyridine, or P(OPh)3; L2= 2,2′-bipyridyl, 1, 10-phenanthroline, ethylenediamine, or o-NH2-C6H4NH2], and trans-[IrH2(Ph2PCH2PPh2)2][O3SR]. Carbonylation of [IrH2(O3SCF3)(PPh3)3] affords the tricarbonyl salt [Ir(CO)3(PPh3)2][O3SCF3] whereas under similar conditions the precursors [IrH2(O3SR)(PPh3)3](R = CH3 or C6H4CH3-p) yield the dihydride salts [IrH2(CO)(PPh3)3][O3SR]. Many of the complexes isolated were solvated by H-bonded molecules of sulphonic acids. Stereochemical assignments based on 1H, 19F, and 31P n.m.r. data are given for all the new products reported.Keywords
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