Reactivity of carbonyl stabilized ylides with Zeise's salt. Synthesis, characterization of mono- and bis-ylidic Pt(II) derivatives and X-ray crystal structure of the {PtCl2[C(H)COCH3(PPh2-0-C6H 4)]} [PPh3CH2COCH3] complex

Article abstract of DOI:10.1016/0020-1693(95)04811-1

Phosphorus and arsenic keto-stabilized ylides (APPY, CMPPY, BPPY, BCyPY-OMe, APAsY, CMPAsY, BPAsY) react with Zeise's salt to give the corresponding monosubstituted Pt(II) complexes trans-[PtCl₂(η²-C₂H₄)(ylide)] (1-7). The bis-ylide complexes trans-[PtCl₂(ylide)₂] (8-12) and trans-[PtCl₂(ylide)(ylide′)] (13-17) can be prepared by reaction of 1-7 with the corresponding ylides. Upon heating complex 8 trans-{PtCl₂[C(H)(PPh₃)COCH₃]₂} in THF a cyclization reaction occurred to give {PtCl₂[C(H)COCH₃(PPh₂-o-C₆H ₄)]} [Ph₃PCH₂COCH₃] (18). The molecular structure of compound 18 was determined by X-ray diffraction. The molecule consists of a metallic anion and a phosphonium counterion. Compound 18 crystallizes in the monoclinic space group P2₁/c with unit cell parameters a= 13.855(3), b= 14.242(3), c = 20.173(4) A, β= 109.31(5)°, Z=4.