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The molecular structure of perfluoro-norbornadiene has been studied using gas-phase electron diffraction data collected on the Balzers KDG2 instrument at UMIST. The structure of the ring system is very similar to that found in the parent hydrocarbon and its crystalline derivatives. The principal structural parameters of the fluorocarbon were observed to be: CC = 1.52(1)_A, CC = 1.32(2) A, CC (bridge) = 1.56(2) A, CF = 1.31(1) A, other CF = 1.34(1) A, ∠ CCC (bridge) = 90(1)_°, the ∠ CCC between the bridge and the six-membered ring is 99(1)°, the angles within the six-membered ring are ∠ CCC = 107(1)° and ∠ CCC = 108(1)°; the bridgehead CF bond forms angles of 115(1) and 118(1)° with the ring CC bonds, the olefinic ∠ CCF = 130(1)° and the bridge ∠ FCF = 108(1)°; the mix-ring fold angle is 116(1)°. |
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