Synthesis and multinuclear magnetic resonance investigation of some 1,3-selenazole and 1,3-selenazoline derivatives
The 1H, 13C, 15N and 77Se NMR data of various annelated 1,3-selenazoles and -1,3-selenazolines are discussed in terms of tautomerism, configurational and conformational preference as well as HOMO-LUMO transition