Molecular structure of cis-1,2-difluoroethene as determined from gas phase electron diffraction and microwave data

Abstract

The structure of cis-1,2-difluoroethene was determined from gas phase electron diffraction data and the rotational constants of HFCCHF, DFCCHF and DFCCDF derived from a microwave study by Laurie and Pence. From a joint least squares analysis of the data the following r g bond distances and r z bond angles have been derived: r(CC) = 1.330 ± 0.011 Å, r(C-F) = 1.342 ± 0.005 Å, r(C-H) = 1.103 ± 0.006 Å, ∠C-C-F = 122.0 ± 0.2°, ∠C-C-H = 124.1 ± 0.4°. The uncertainties represent the limits of error (3σ).