Cycloplatination of Thiosemicarbazones Derived from Furane. Crystal and Molecular Structure of [{Pt[(OC4H2)C(Me)=NN=C(S)NHEt]}2{μ-Ph2P(CH2)2PPh2}]
作者:Luis Adrio、José M. Antelo、Juan M. Ortigueira、Darío Lata、Teresa Pereira、Margarita López-Torres、José M. Vila
DOI:10.1002/zaac.200700244
日期:2007.9
Treatment of thiosemicarbazones (OC4H3)C(Me)=NN(H)C(=S)NHR (R: Me, a; Et, b) with [cis-PtMe2(cod)] afforded the tetranuclear compounds [Pt(OC4H2)C(Me)=NN=C(S)NHR}]4 (R: Me, 1a; Et, 1b). The reaction of 1a and 1b with triphenylphosphine in 1:4 molar ratio gave rise to the mononuclear compounds [Pt(OC4H2)C(Me)=NN=C(S)NHR}(PPh3)] (2a, 2b). Treatment of 1a and 1b with large-bite diphosphines Ph2P(CH2)nPPh2
用 [cis-PtMe2(cod)] 处理缩氨基硫脲 (OC4H3)C(Me)=NN(H)C(=S)NHR(R:Me,a;Et,b)得到四核化合物 [Pt(OC4H2) )C(Me)=NN=C(S)NHR}]4(R:Me,1a;Et,1b)。1a 和 1b 与三苯基膦以 1:4 的摩尔比反应生成单核化合物 [Pt(OC4H2)C(Me)=NN=C(S)NHR}(PPh3)] (2a, 2b)。用大咬合二膦 Ph2P(CH2)nPPh2 (n = 2, dppe; n = 3, dppp; n = 4, dppb) 处理 1a 和 1b 得到双核化合物 -[Pt[(OC4H2)C(Me)] =NN=C(S)NHR]}2μ-Ph2P(CH2)nPPh2}], (3a–5a, 3b–5b),双膦处于桥接模式。与短咬合二膦 Ph2PCH2PPh2 (dppm) 和 Ph2PC(=CH2)PPh2