Structure and Internal Motion of C2F6 and Si2Cl6 Vapors

Abstract

The molecular structure and internal motion of C2F6 vapor and of Si2Cl6 vapor have been investigated by means of the sector‐microphotometer method of electron diffraction. Both molecules exhibit hindered internal rotation, with equilibrium in the trans position. The interdependence of the potential barrier and the modes of vibration other than the torsional is presented graphically. The values for the bonded distances are: C – F = 1.32±0.01 A, C – C = 1.56±0.03 A with ∠ CCF = 109½°±1½° and Si – Cl = 2.01±0.01 A, Si – Si = 2.24±0.06 A with ∠ SiSiCl = 109½°±1°.