摘要
六配位磷负离子的立体化学近年来已引起人们的兴趣。Ramirez发现含有两个五元环的六配位磷负离子其晶体构型为顺式;Trippett用负离子亲核进攻双环五配位磷化物,先形成反式六配位磷负离子,进而转化成顺式;Denney也有类似的发现。本文用含有两个不同双环五配位磷化物与甲氧基负离子反应,通过加成和取代,形成六配位磷负离子顺、反异构体。反式体为动力学控制产物,顺式体为热力学控制产物。
Some spirophosphoranes reacted with 2 mol of potassium methoxide in the presence
of 18-crown-6 to give cis and trans hexacoordinated phosphorus anions ^(31)P NMR spectrum
shows that methoxide ion replaced exocyclic ligand to yield six-coordinate phosphorus
anions containing two methoxide groups, and the formation of trans isomer is kinetically
controlled and of cis isomer is thermodynamically controlled.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1989年第5期472-475,共4页
Acta Chimica Sinica
