The title compounds have been synthesized by Grignard reactions or pyrolysis of diplumbanes respectively. The crystal structures of m-Tol4Pb and Ph4Pb (redetermination) have been determined. All eight compounds (Ph/Tol)4(Sn/Pb) are S4 symmetric and contracted along this unique axis. The 13C-NMR chemical shifts and the couplings 1J(119Sn/207Pb13C) as well depend additively upon the methyl substituents
分别通过格氏反应或双潘班的热解合成了标题化合物。已经确定了m -Tol 4 Pb和Ph 4 Pb的晶体结构(重新测定)。所有八种化合物(Ph / Tol)4(Sn / Pb)都是S 4对称的,并且沿着这个唯一的轴收缩。的13 C-NMR
化学位移和联接器1 Ĵ(119的Sn / 207 Pb 13 C),以及附加地取决于甲基取代基。比例1 ķ(207 Pb 13 C):1 ķ(119 Sn coupling 13 C)的降低的耦合常数都接近1.61;给出了与文献中烷基,烯基和炔基取代基的值的比较。δ(207 Pb):δ(119 Sn)之比为2.28。给出了IR(700至200 cm -1)和拉曼(700至50 cm -1)数据。