The molecular structure of seleno- and thiocarbonyl difluoride

Abstract

The geometric structures of seleno- and thiocarbonyl difluoride, Se=CF 2 and S=CF 2, studied in the gas phase by electron diffraction, are presented. For S=CF 2 the electron diffraction data are combined with microwave rotational constants. The following geometric parameters were derived: for SeCF 2 ( r α 0 values) Se-C = 1.743(3) Å, C-F = 1.314(2) Å and ∡ FCF = 107.5(0.4)° ; for SCF 2 ( r av values) S-C = 1.589(2) Å, C-F = 1.316(2) Å and FCF = 107.1(0.2)° . Uncertainties are 3σ values of the least squares analyses.