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

Chlorine nuclear quadrupole resonance frequencies are reported for the compounds (n = 2,3,4; Y = H, CH 3 , C 2 H 5 , Si(CH 3 ) 3 , F. OCH 3 , N 3 , NR 2 , Cl, SCH 3 , P(C 6 H 5 ) 2 , As(CH 3 ) 2 , Mn(CO) 5 , π-C 5 H 5 Fe(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-C 5 H 5 Fe(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.