Haider HMJ. Calculated of vibrational frequencies for molecular system from sulphur-halides in the infrared region by using the semi empirical programs. QJPS [Internet]. 2017Aug.21 [cited 2026Jan.18];20(1):146-58. Available from: https://journalsc.qu.edu.iq.51-77-64-103.cpanel.site/index.php/JOPS/article/view/440