Novelperalkylcyclotetrasilanes of the type (R1R2Si)2(R1= R2= ButCH2, R3= R4= Pri; R1= R2= ButCH2, R3= But, R4= Me) were obtained by co-condensation of two 1,2-dichlorotetra-alkyldisilanes with Li; the structure of the tetraisopropyltetraneopentylcyclotetrasilane (1), determined by X-ray crystallography, is folded with a large dihedral angle.
所述类型的新颖peralkylcyclotetrasilanes(R 1 - [R 2 Si)的2(R 1 = R 2 =卜吨CH 2,R 3 = R 4 = PR我; R 1 = R 2 =卜吨CH 2,R 3 =卜吨,通过将两个1,2-二氯四烷基二硅烷与Li共缩合得到R 4 = Me);通过X射线晶体学测定的四异丙基四戊基戊基环四硅烷(1)的结构以大的二面角折叠。