ATRANES. II. DIPOLE MOMENTS AND STRUCTURE OF SILATRANES

Possible steric configurations of 1-organyl- and 1-organoxysilatranes, , are considered. The dipole moments of six compounds of this type (X=CH 3 , (CH 3 ) 2 CH, CH 2 =CH, C 6 H 5 , C 2 H 5 O, C 6 H 5 O) have been found experimentally to be extremely high, 5.3–7.1 D. They conclusively show that the silatranes contain a semipolar transannular coordinate bond Si←N between the negatively charged 5 -covalent silicon atom in the middle of the planar SiO 3 group and the tetrahederal onium nitrogen atom. Authors: M. G. Voronkov, I. B. Mazheika, G. I. Zelchan. English Translation in Chemistry of Heterocyclic Compounds , 1965, 1 (1), pp 38-41 http://link.springer.com/article/10.1007/BF01168916