Abstract
The simplified cumulant method was applied to diffraction data of CClF to study the equilibrium molec- ular parameters over a range of temperatures. The molecular parameters of CClF by the simplified cumulant method were compared with those from the traditional method. Also the instrumentation of picosecond time resolved electron diffraction (TRED) and the experimental details are described. The total experimental temporal resolution was discussed in terms of the electron pulse width. The TRED system was applied to study the molecular structures for CClF at room temperature. The molecular structural parameters CClF from TRED are compared with those from GED/RT. The molecular parameters (r )of bonded C-F and C-Cl for CClF by simplified CA are 132.00(2) pm and 175.20(3) pm, respectively, by using GED/ RT. From the results of TRED experiments r for bonded C-F and C-Cl are 132.23(13) pm and 177.23(19) pm.
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