Monoxidised sulfur and selenium derivatives of bis(diphenyl-phosphino)amine: synthesis and co-ordination chemistry

Abstract

The Complexes cis/trans-[M{Ph₂P(E)NHPPh₂}₂] Cl₂ and [M{Ph₂P(E)NPPh₂}₂](M = Pd or Pt) E = S or Se have been prepared and characterised. The crystal structures of two representative examples, trans-[Pt{Ph₂P(Se)NHPPh₂}₂] Cl₂ and cis-[Pt{Ph₂P(Se)NPPh₂}₂], have been determined. The PtSeP₂N rings are puckered in both cases although there are some differences as a result of the formal charge upon the ligand and the cis/trans geometries. The cis neutral complex has shorter Pt–P and longer Pt–Se bonds than those of the trans protonated complex. Deprotonation of the ligand also results in a significant shortening of the P–N bond lengths.