X-ray, IR, NMR, UV-visible spectra and DFT analysis of 5-aryloxy-(1H)-tetrazoles, structure, conformation and tautomerism by Pesyan, Nader Noroozi, Bavafa, Sadeghali, Enayati, Mohammad Samim, Hoseinpour, Sajedin, Ostadhosseini, Narges, Dadrass, Alireza, Soleimannejad, Jannet, Sahin, Ertan, Mohamed Tahir, Mohamed Ibrahim