T he (11h-indeno[1,2-b]quinoxalin-11-ylidene)thiocarbohydrazone were synthesized and consequently some new novel structures were obtained in a good yields.Their chemical structures were assigned by means of spectral analysis.Molecular modeling at B3LYP/6-31 g (d, p) is utilized to calculate both the optimized structure and vibrational spectra of some studied structures.A promising antimicrobial re...