“…According to Spell [74], this is one of the most useful bands for detecting the presence of disubstituted piperazines. Piperazine ring stretching modes of the title compound are assigned at 1115, 960, 746 cm -1 (IR), 1175, 1110, 963, 905, 749 cm -1 (Raman) and in the range 1171-748 cm -1 theoretically [57,58,73].…”