Re( v ) and Re( iii ) complexes with sal 2 phen and triphenylphosphine: rearrangement, oxidation and reduction
- 15 November 2010
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Dalton Transactions
- Vol. 40 (1) , 269-276
Abstract
Reactions of ReV, tetradentate Schiff base complexes with tertiary phosphines have previously yielded both rearranged ReV and reduced ReIII complexes. To further understand this chemistry, the rigid diiminediphenol (N2O2) Schiff base ligand sal2phen (N,N′-o-phenylenebis(salicylaldimine)) was reacted with (n-Bu4N)[ReOCl4] to yield trans-[ReOCl(sal2phen)] (1). On reaction with triphenylphosphine (PPh3), a rearranged ReV product cis-[ReO(PPh3)(sal2phen*)]PF6 (2), in which one of the imines was reduced to an amine during the reaction, and the reduced ReIII products trans-[ReCl(PPh3)(sal2phen)] (4) and trans-[Re(PPh3)2(sal2phen)]+ (5) were isolated. Reaction of sal2phen with [ReCl3(PPh3)2(CH3CN)] resulted in the isolation of [ReCl2(PPh3)2(salphen)] (3). The compounds were characterized using standard spectroscopic methods, elemental analyses and single crystal X-ray crystallography.Keywords
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