Abstract
Palladium(II) complexes of polydimethylsiloxane (PDMS)-functionalised pyridine ( 1), [Pd(OAc) 2( 1) 2] ( 2) and [PdCl 2( 1) 2] ( 3), were synthesised and characterised. The cis/ trans isomerism of models of complex 3 was investigated using DFT calculations. Models of complex 2 were also theoretically analysed, to identify any possible C–H⋯O interactions. Complex 2 was investigated as a catalyst for selective alcohol oxidations both under solventless conditions and in supercritical carbon dioxide (scCO 2). In scCO 2 the presence of 1 was found to stabilise the palladium complex, inhibiting its decomposition to Pd(0), a stabilisation not witnessed with non-PDMS functionalised pyridine analogues.
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