Chlorine Nuclear Quadrupole Resonance Spectra of 1-Substituted 2-Chloropolyfluorocycloalkenes

Abstract

Chlorine nuclear quadrupole resonance frequencies are reported for the compounds [Formula: see text] (n = 2,3,4; Y = H, CH3, C2H5, Si(CH3)3, F. OCH3, N3, NR2, Cl, SCH3, P(C6H5)2, As(CH3)2, Mn(CO)5, π-C5H5Fe(CO)2, but not all combinations). The values range from 38.999 MHz (n = 3; Y = F) to 34.668 MHz (n = 2; Y = π-C5H5Fe(CO)2) and are roughly related to the electronegativity of Y and to the ring size. The mean temperature coefficients of the frequencies lie in the range −0.9 × 10−4 to −8 × 10−4/°K.