INVESTIGATION OF THE ELECTRONIC-STRUCTURE OF 4-CHLOROPHENYLISOXAZOLE AND 4-CHLOROISOXAZOLINE BY NQR SPECTROSCOPY AND QUANTUM-CHEMICAL CALCULATIONS

Cl-35 NQR spectra of substituted phenylisoxazotes and isoxazolines wer e analysed For certain molecules the atom charges and orbital populati ons were calculated with the MINDO/3 method. It was proved that a chlo rine atom at position 4 on an isoxazole ring transmits the influence f rom the phenyl ring at position 3 to the phenyl ring at position 5 on the isoxazole ring through the system of pi-bonds.