F. Jakle et al., Selective synthesis of 1-stanna-2-boraferrocenes: novel bidentate Lewis acids via an unexpected rearrangement reaction, CHEM COMMUN, (5), 1999, pp. 453-454
Ferrocene based bidentate Lewis acids of the general formula 1,2-fc(BR2)(Sn
R3) are obtained in one step from 1,1'-distannaferrocenes and chloroboranes
via an unexpected rearrangement reaction.