title: Synthesis and characterization of Sn(II), Pb(II) and Yb(II) complexes supported by [C(Ph(2)P=NSiMe3){6-(2-RC5H3N)}]2- or [CH(Ph2P=NSiMe3){6-(2-RC5H3N)}]- (R = 3,5-dimethyl-1-pyrazolyl or iminophosphoranyl) ligands.
abstract: The synthesis and characterization of several tin(II), lead(II) and ytterbium(II) complexes supported by [C(Ph2P=NSiMe3){6-(2-RC5H3N)}]2- or [CH(Ph2P=NSiMe3){6-(2-RC5H3N)}]- (R = 3,5-dimethyl-1-pyrazolyl or iminophosphoranyl) ligands are reported. Reaction of 2-R-6-{CH2P(Ph2)=NSiMe3}C5H3N with M[N(SiMe3)2]2 (M = Sn, Pb) generated tin(II) and lead(II) complexes [M{C(Ph2P=NSiMe3){6-(2-RC5H3N)}}]2 [3, M = Sn, R = 3,5-dimethyl-1-pyrazolyl; 4, M = Pb, R = 3,5-dimethyl-1-pyrazolyl; 9, M = Sn, R = Me3SiN=P(Ph2); 10, M = Pb, R = Me3SiN=P(Ph2)]. When R = p-MeC6H4N=P(Ph2), a N,N-chelate tin(II) complex, [Sn{2-{N(p-MeC6H4)=PPh2}-6-{CHP(Ph2)=NSiMe3}}{N(SiMe3)2}] (11), was isolated. Treatment of 2-(Ph2P=NSiMe3)-6-{CH2P(Ph2)=NSiMe3}C5H3N with Yb[N(SiMe3)2]2(DME) afforded N,N,N-chelale ytterbium(II) complex [Yb{2-{N(SiMe3)=PPh2}-6-{CHP(Ph2)=NSiMe3}}{N(SiMe3)2}] (12). The complexes were characterized by elemental analyses and multinuclear NMR spectroscopy. Complexes 3, 4 and 10-12 were further characterized by single crystal X-ray diffraction techniques.
authors.affiliation: Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
authors.forename: Zuo-Yun
authors.initials: ZY
authors.lastname: Chai
authors.forename: Zhong-Xia
authors.initials: ZX
authors.lastname: Wang