177649-75-1Relevant academic research and scientific papers
Organometallic Chemistry of Ph3PC=C=O. Synthesis, Characterization, X-ray Structure Determination, and Density Functional Study of the First Stable Bis-η1-ketenyl Complex, trans-[PtCl2{η1-C(PPh3)CO}2]
Bertani, Roberta,Casarin, Maurizio,Ganis, Paolo,Maccato, Chiara,Pandolfo, Luciano,Venzo, Alfonso,Vittadini, Andrea,Zanotto, Livio
, p. 1373 - 1383 (2008/10/08)
Mono- and bis-η1-ketenyl Pt(II) complexes have been synthesized by reacting Zeise's salt or the related dimeric compound, [{PtCl2(C2H4)}2], with the oxocumulenic ylide ketenyliden-etriphenylphosphorane, Ph3PC=C=O, 1, in suitable ratios. In particular, the η1-ketenyl derivative, trans-[PtCl2(C2H4){η1-C(PPh 3)CO}], 2, has been isolated and characterized. The reaction of 2 with one more equivalent of 1 displaces the coordinated ethylene giving the first stable bis-η1-ketenyl derivative, trans-[PtCl2{η1-C(PPh3)CO}2], 6. The X-ray crystal structure of 6 shows a trans centrosymmetric geometry around Pt, with the PCCO moiety and the metal lying in a plane that forms an angle of ～65° with the Pt(II) coordination plane. Density functional calculations indicate that steric effects play a leading role in determining such an arrangement. Data on the reactivity of 2 and 6 are also reported. ? Dipartimento Processi Chimici di Ingegneria, Universita? di Padova. ? Dipartimento di Chimica Inorganica, Metallorganica ed Analitica, Universita? di Padova.
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
Facchin, Giacomo,Zanotto, Livio,Bertani, Roberta,Nardin, Giorgio
, p. 157 - 166 (2008/10/08)
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.
