Metal complexes based on an upper-rim calix[4]arene phosphine ligand
2001
Abstract A new upper-rim phosphacalix[4]arene 5,17-bis(diphenylphosphinomethyl)-25,26,27,28-tetrapropoxycalix[4]arene ( 4 ) has been prepared starting from commercially available tert -butyl calix[4]arene. Treatment of 4 with (COD)PdMeCl and (COD)PtCl 2 gives polymeric phosphine-coordinated Pd(II) and Pt(II) species, respectively. 4 reacts with [(COD)RhCl] 2 to give a di-rhodium complex that is an active catalyst for the hydroformylation of 1-octene and styrene.
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