<b>Thermal decomposition of vinyl- and allylsilane platinum(II) complexes and platinum(II) catalysed synthesis of (<i>E</i>),(<i>E</i>)-1,4-diphenyl-1,3-butadiene</b>

• Main Authors: Paul P. Mebe, John W. Fitch, Mark Munyai
• Format: Article
• Language: English
• Published: Chemical Society of Ethiopia 2008-12-01
• Series: Bulletin of the Chemical Society of Ethiopia
• Subjects: Thermal analysis; Vinyl- and allylsilane platinum(II) π-complexes; Platinum(II) catalysed synthesis; (<i>E</i>); (<i>E</i>)-1; 4-diphenyl-1; 3-butadiene
• Online Access: http://www.ajol.info/index.php/bcse/article/view/61235

Thermal stabilities of Pt(II) complexes: K[PtCl₃(CH₂=CHSiMe₃)], K[PtCl₃(CH₂=CHCH₂SiMe₃)], K[(acac)PtCl(CH₂=CHSiMe₃)] and [PtCl(CH₂=CHCH₂SiMe₃)]₂, were examined. All complexes were found to be stable at room temperature but they decomposed without melting above about 90 ^oC. The allylsilane complex decomposed above about 125 <sup>o</supC. All complexes liberated chlorotrimethylsilane on decomposition, showing the facile cleavage of the C−Si bond by nucleophilic attack on the silicon by the chloride ion. (<i>E</i>),(<i>E</i>)-1,4-diphenyl-1,3-butadiene was stereoselectively synthesised in good yield from (<i>E</i>)-β-styrylsilane in the presence of Zeise’s salt.