192328-75-9Relevant academic research and scientific papers
Palladium complexes of bridgehead phosphines
Coles, Simon J.,Edwards, Peter G.,Hursthouse, Michael B.,Malik, K. M. Abdul,Thick, Jacqui L.,Tooze, Robert P.
, p. 1821 - 1830 (2007/10/03)
Palladium chlorocomplexes reacted with 9-phenyl-9-phosphabicyclononanes (PPBN) and 1-phenylphospholane and gave trans-chlorobis(phosphine)palladium(II) complexes, 1-phenylphospholane also gave rise to a chloro-bridged dimer.With palladium acetate, the two isomers of PPBN (9-phenyl-9-phosphabicyclo-nonane and -nonane, 3,3,1-PPBN and 4,2,1-PBN respectively) formed trans bis(phosphine) complexes exclusively whereas 1-phenylphospholane formed the cis-bis(phosphine) complex; examples of both trans and cis complexes have been structurally characterized.The acetate groups were readily replaced by sulfonic and phosphonic acids to give sulfonato and phosphonato complexes respectively.Reduction of the acetato-4,2,1-PPBN complex to 0(4,2,1-PPBN)3> occurred in alcoholic media readily, however the isomeric 3,3,1-PPBN complex was considerably more resistant to reduction.Abstraction of halide from both dichloro-PPBN complexes by Ag(O3SCF3) in ethanol resulted in the formation of phosphonium salts.
