(Diphosphane monosulfide)platinum(
<scp>II</scp>
) Complexes for Hydroformylation Reactions: Their Catalytic Activity and a High‐Pressure NMR Mechanistic Study
作者:Antonio Lofù、Piero Mastrorilli、Cosimo F. Nobile、Gian P. Suranna、Piero Frediani、Jonathan Iggo
DOI:10.1002/ejic.200501016
日期:2006.6
neutral complexes of formula [κ2P,S-(dppmS)Pt(CH3)(Cl)] (1), [κ2P,S-(dppeS)Pt(CH3)(Cl)] (2) and [κ2P,S-(dpppS)Pt(CH3)(Cl)] (3) [dppmS = Ph2PCH2P(S)Ph2; dppeS = Ph2P(CH2)2P(S)Ph2; dpppS = Ph2P(CH2)3P(S)Ph2] are active catalyst precursors for the hydroformylation of 1-octene in methyl isobutyl ketone. The order of reactivity found is3 > 2 > 1. Surprisingly, the cationic complexes [κ2P,S-(dppeS)Pt(CH3)(CH3CN)]BF4
式 [κ2P,S-(dppmS)Pt(CH3)(Cl)] (1)、[κ2P,S-(dppeS)Pt(CH3)(Cl)] (2) 和 [κ2P,S- (dpppS)Pt(CH3)(Cl)] (3) [dppmS = Ph2PCH2P(S)Ph2; dppeS = Ph2P(CH2)2P(S)Ph2;dpppS = Ph2P(CH2)3P(S)Ph2] 是 1-辛烯在甲基异丁基酮中加氢甲酰化的活性催化剂前体。发现的反应性顺序是 3 > 2 > 1。令人惊讶的是,阳离子复合物 [κ2P,S-(dppeS)Pt(CH3)(CH3CN)]BF4 (4a) 和 [κP,μ-κS-(dppeS)Pt( CH3)}2][BF4]2 (5) 的活性低于类似的中性配合物 2。 高压 NMR 研究表明,在 20 °C、1 至 50 bar 的合成气和 SnCl2 的存在下, 2 和 4a 立即反应形成相同的乙酰复合物