Unusually short phantom bonds containing Si and P atoms. A theoretical study of 2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane and its phosphorus dication analogue
Abstract
By means of ab initio calculations, unusually short interatomic distances are predicted between the nonbonded atoms in the title compounds and interpreted in terms of small extent of back electron-donation from the linked oxygens and the accompanying orbital contraction around the nonbonded atoms.