Abstract

The energy of fluorination of polydifluorosilylene (SiF 2) x has been measured in a bomb calorimeter. From the combustion results the standard enthalpy of formation ΔH f o(SiF 2, solid polymer, 298.15 K) was determined to be −(186.3 ± 1.7) kcal mol −1. Combination of this result with various subsidiary data gives a silicon-silicon bond energy in the polymer of (46.8 ± 6.7) kcal mol −1, a value comparable with that in other straight chain fluorosilanes.

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