(HYDROXYALKENYL)-DIPHENYLPHOSPHINE OXIDES, THEIR LITHIUM SALTS AND ZINC COMPLEX

Abstract

The synthesis and structural characteristics of the lithium salt and zinc complex of Ph₂P(O)CPh[dbnd]CHOH 1 are described. While the lithium salt 2 is a stable mixture of (E)- and (Z)-enolate forms 2b and 2c, the zinc complex 3 seems to coordinate as a chelate of phosphonate and acetate groups with some dynamic behaviour in solution. Additionally, the oxide Ph₂P(O)CH[dbnd]CHC[P(O)Ph₂][dbnd]CHOH 5 and its lithium salt 6 are obtained and their structures and conformations elucidated by NMR spectroscopy (¹H, ³¹P, ¹³C).

Key Words:

• 2,4-Bis(diphenylphosphinyl)-1,3-butadienol
• hydroxyalkenyldiphenylphosphine oxides
• lithium salt
• NMR (¹H, ³¹P, ¹³C)