Binuclear tin and germanium calix[4]arenes
Abstract
Ditin(II) and digermanium(II) calix[4]arenes, [Butcalix]M2 (1, M = Sn; 2, M = Ge) have been prepared by treatment of [Butcalix]H4 with M(NR2) (R = Me or Me3Si); the reaction of [Butcalix]Li4 with SnCl4 affords the mixed valence ditin derivative [Butcalix]Sn2Cl2 3.