Transition metal–carbon bonds. Part XXXI. Internal metallations of palladium(II)–t-butyldi-o-tolylphosphine and –di-t-butyl-o-tolylphosphine complexes
- 1 January 1972
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 7,p. 860-865
- https://doi.org/10.1039/dt9720000860
Abstract
The complexes trans-[PdCl2L2]{L = PBut(o-tolyl)2 or PBut 2(o-tolyl)} are shown to undergo internal metallation at the tolyl-methyl group very readily, to give complexes of the type [Pd2Cl2(P–C)2]{(P′–C)= CH2C6H4PBut(o-tolyl) and (P″–C)= CH2C6H4PBu2 t}. The ligand PBut 2(o-tolyl) undergoes metallation more readily (in deuteriochloroform at ca. 35°) than PBut(o-tolyl)2. The chloride bridges of the binuclear complexes [Pd2Cl2(P–C)2] are replaced on treatment with silver carboxylates to give the compounds [Pd2X2(P–C)2](X = OAc or OBz). These chloride bridges are split by various ligands (e.g. PPh3, acetylacetonate, (–)-stilbenediamine etc.) to give mononuclear species.Keywords
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