The pure rotational spectrum of pivaloyl chloride, (CH3)3CCOCl, between 800 and 18800MHz

Abstract: A search accelerated correct intensity Fourier transform microwave (SACI-FTMW) spectrometer has been used to rapidly record the rotational spectrum of pivaloyl chloride between 8 and 18GHz. Both a radio frequency and regular cavity-based instrument have then been used to obtain high resolution measurements below 4GHz and in the 4–18GHz regions, respectively. Rotational constants, centrifugal distortion constants, and chlorine nuclear quadrupole coupling constants have been determined for both the 35Cl and 37Cl isotopologues. The spectrum provides no evidence concerning internal rotation in the molecule. [Copyright &y& Elsevier]