Complexes of the platinum metals. Part 39. Salicylaldehydato(2–) derivatives of ruthenium, osmium, and iridium. X-Ray crystal structures of [Ru(OC 6 H 4 CO)(HOC 6 H 4 CH 2 OH)(CO)(PPh 3 ) 2 ]·CH 2 Cl 2 and [Ru(OC 6 H 4 CO)(MeOH)(CO)(PPh 3 ) 2 ]·MeOH
Authors:
- Arvind SahajpalASArvind Sahajpal
- Stephen D. RobinsonSRStephen D. Robinson
- Muhammed A. MazidMMMuhammed A. Mazid
- Majid MotevalliMMMajid Motevalli
- Michael B. HursthouseMHMichael B. Hursthouse
- 1 January 1990
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 7,p. 2119-2124
Abstract
Salicylaldehyde reacts with [RuH2(CO)(PPh3)3] in refluxing toluene to afford a ruthenium(II) salicylaldehydato(2–) complex which crystallised from CH2Cl2–light petroleum as a dichloromethane-solvated o-hydroxybenzyl alcohol adduct [[graphic omitted])(HOC6H4CH2OH)(CO)-(PPh3)2]·CH2Cl2, and from CH2Cl2–MeOH as the methanol- solvated methanol adduct [[graphic omitted])-(MeOH)(CO)(PPh3)2]·MeOH. Formation of the o-hydroxybenzyl alcohol adduct clearly implies the ruthenium-mediated reduction of the CHO group in salicylaldehyde. Carbon monoxide and pyridine react with [[graphic omitted])(MeOH)(CO)(PPh3)2]·MeOH to form [[graphic omitted])L(CO)(PPh3)2](L = CO or py respectively). The reaction of salicylaldehyde with [OsH2(CO)(PPh3)3] includes a carbonylation step and affords [[graphic omitted])(CO)2(PPh3)2]. Reactions of [RhH(PPh3)4] and mer-[IrH3(PPh3)3] with salicylaldehyde in boiling toluene afford [Rh(OC6H4CHO)(CO)(PPh3)2] and [[graphic omitted])H(CO)(PPh3)2] respectively. X-Ray diffraction studies on [[graphic omitted])(HOC6H4CH2OH)(CO)(PPh3)2]·CH2Cl2and[[graphic omitted])(MeOH)(CO)(PPh3)2]·MeOH establish the presence of O,C-chelated salicylaldehydate(2–) ligands in both cases and a monodentate o-hydroxybenzyl alcohol ligand in the former complex.Keywords
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