Investigation of Experimental and Theoretical Spectroscopic Properties using Density Functional Theory (DFT/B3LYP) and Hatre Fock (HF) Methods with 6-31G (d) Basis Set of 1-Acetyl-3-p-Methylbenzyl-4-[3-(3-nitrobenzoxy)-4-methoxybenzylidenamino]-4,5-dihydro-1H-1,2,4-triazol-5-one