Multicavitands II: Synthesis of a non centrosymmetric hollow molecular unit (koiland) based on fusion of two p-tert-butylcalix[4]arenes by both silicon and titanium atoms

Abstract

The synthesis and NMR structural investigation of a non-centrosymetric koiland (hollow molecular unit) composed of two p-tert-butylcalix[4]arenes fused by both silicon and titanium atoms, and of its precursor obtained by fusing two p-tert-butylcalix[4]arenes with a silicon atom were achieved.