Abstract
The microwave spectra of C5H735Cl and C5H737Cl have been observed and analyzed. If the spiropentane ring is assumed to be in the D2d configuration, with methylene-group parameters similar to cyclopropyl chloride, the following parameters are calculated from the observed moments of inertia: r(CCl)=1.74 Å, r(CC)=1.51 Å, and ∠RCCl=118°. The quadrupole coupling constants in the inertial axis system have been obtained for both isotopic species. For the 35Cl species, the values are χaa=−30.98 MHz, χbb=6.22 MHz, and χcc=24.76 MHz. Evidence is presented which indicates that the chemical bond linking the chlorine to the ring is not axially symmetric and does not lie along the C–Cl internuclear line.
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