Synthesis and characterization of triphenylphosphine stabilized silver α,β-unsaturated carboxylate: Crystal structure of [Ag(O2CCHdouble bond; length as m-dashC(CH3)2)(PPh3)2]

A series of triphenylphosphine coordinated silver α,β-unsaturated carboxylates of type [Ag(O2CR)(PPh3)n: n = 1, R = CH3CHdouble bond; length as m-dashCH (2a), (CH3)2Cdouble bond; length as m-dashCH (2b), CH3CH2CHdouble bond; length as m-dashCH (2c), CH3CH2CH2CHdouble bond; length as m-dashCH (2d), PhCHdouble bond; length as m-dashCH (2e), CH2double bond; length as m-dashCH (2f); n = 2, CH3CHdouble bond; length as m-dashCH (3a), (CH3)2Cdouble bond; length as m-dashCH (3b), CH3CH2CHdouble bond; length as m-dashCH (3c), CH3CH2CH2CHdouble bond; length as m-dashCH (3d)] were prepared by reaction of relative silver carboxylates (1a–1f) with triphenylphosphine in chloroform. These complexes were obtained in high yields and characterized by elemental analysis, 1H NMR, 13C NMR, 31P NMR and IR spectroscopy. Thermal stability of the complexes has been determined by TG analysis. The molecular structure of [Ag((O2CCHdouble bond; length as m-dashC(CH3)2))(PPh3)2] (3b) shows that the senecioato ligand is chelated with silver atom and generate, a distorted tetrahedron.