A gas-phase electron diffraction study op the molecular structure of 1,1,1,2-tetrafluoroethane |
| |
Authors: | GND Al-Ajdah B Beagley MO Jones |
| |
Institution: | Department of Chemistry, University of Manchester Institute of Science and Technology, Sackville Street, Manchester M60 1QD Gt. Britain |
| |
Abstract: | The molecular structure of 1,1,1,2-tetrafluoroethane is studied using gas-phase electron diffraction data collected on the Balzers KDG2 instrument. Effective least-squares refinement of the geometry is achieved with values for vibrational amplitudes transferred from normal coordinate calculations on related molecules. The following values for the main independent geometrical parameters are obtained (ra values with e.s.d. in parentheses): C-C = 1.501(4) Å, C-H = 1.077 (15) Å, C-F(CH2F) = 1.389(6) Å, C-F(CF3) = 1.334 (2) Å, ∠CCH= 106.1(12)°, ∠CCF(CH2F)= 112.3(4) Å, ∠CCF(CF3)= 110.4(2). Other angles are ∠FCF = 108.6 (2)° and ∠FCH = 111.4(15)°, with ∠HCH constrained at 109.4°. The ra bond lengths of all the fluoroethanes are compared. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|