³⁵Cl Nuclear Quadrupole Resonance of Alkyl Chloroformates, Alkyl Acid Chlorides, and Carbamyl Chlorides

Abstract

The 35CI nuclear quadrupole resonance (n.q.r.) frequencies at 77 "K of twenty-two chloroformates, twenty-eight acid chlorides, two thiocarbonyl molecules, and five carbamyl chlorides are reported. Introductionchlorine by a saturated linkage. The frequency The planarity (1, 2) of the -X-COCI unit suggests n-bonding, and the difference in .nbonding when X is R, 0 , S, or N could be measured by comparing the 35C1 n.q.r. in equivalent molecules. Unfortunately, no resonances were detected in -SCOCI molecules nor in -NCSCl molecules. Frequencies were obtained for thirteen pairs of molecules, RCOCl and ROCOCI, and the frequency variation within each series was small. The frequency variation is qualitatively discussed.