P,C-Chelation versus P,P-coordination of unsymmetrical phosphorus ylides in palladacyclopropa[60]fullerene complexes; synthetic, spectroscopic, and theoretical studies
作者:Seyyed Javad Sabounchei、Marjan Hosseinzadeh、Ali Hashemi、Sadegh Salehzadeh、Farahnaz Maleki
DOI:10.1039/c6dt02332k
日期:——
The new palladacyclopropa[60]fullerene complexes incorporating α-keto stabilized phosphorus ylides were synthesized in a three-component reaction of the unsymmetrical phosphorus ylides [Ph2P(CH2)nPPh2C(H)C(O)C6H4-m-R] (n = 1, R = Br, NO2, (Y1, Y2); n = 2, R = Br, NO2, (Y3, Y4)), C60 and Pd(dba)2 (dba = dibenzylideneacetone). The obtained novel P,C-chelated [(η2-C60)Pd(κ2-Y1)] (1) and [(η2-C60)Pd(κ2-Y2)]
在不对称磷酰基[Ph 2 P(CH 2)n PPh 2 C(H)C(O)C 6 H 4 - m -R](n = 1,R = Br,NO 2,(Y 1,Y 2); n = 2,R = Br,NO 2,(Y 3,Y 4)),C 60和Pd (dba)2(dba =二亚苄基丙酮)。将所得到的新的P,C-螯合[(η 2 -C 60)的Pd(κ 2 -Y 1)](1)与[(η 2 -C 60)的Pd(κ 2 -Y 2)](2)配合物和P,P-二协调[(η 2 -C 60)的Pd(Y 3)2 ](3)和[(η 2 -C 60)的Pd(Y 4)2 ](4)复合物经IR成功,其特征在于, UV-Vis,ESI-MS和NMR(1 H,13C和31 P)光谱方法。配合物1-4是极少的具有叶绿素磷配体的Palladacyclopropa [60]富勒烯配合物。光谱结果表明,没有任何可能的副产品,包括P,P-协调[(η