The syntheses of Zn(II), Cd(II) and Cu(II) complexes of 2,5-bis{N-(2,6-diisopropylphenyl)iminomethyl}pyrrole (DIP₂pyr)H 1 and their catalytic activities in CO₂ fixation are reported. The structures of these complexes were characterized by IR, ¹H, ¹³C NMR and single crystal X-ray diffraction techniques. The catalytic activities of these complexes for the cycloaddition of CO₂ to an epoxide under one atmosphere of pressure and mild temperature conditions to yield cyclic carbonate have been studied. Among the four complexes synthesized, the Zn(II) and Cu(II) complexes were found to be versatile whereas the Cu(II) complex was more selective in the conversion. They were highly effective for the conversion of monosubstituted terminal epoxides, disubstituted terminal and internal epoxides to their corresponding cyclic carbonates with good to high yields.

Imidazole, 1,2,4-triazole and tetrazole based molecules were prepared for their possible applications in nitrogen-rich gas generators. The energetic salts of 1-(1H-1,2,4-triazol-3-yl)-1H-tetrazole (9), 5-(1H-tetrazol-1-yl)-1H-1,2,4-triazol-3-amine (10), 1-(3-azido-1H-1,2,4-triazol-5-yl)-1H-tetrazole (11) and 3-azido-1H-1,2,4-triazol-5-amine (12) were prepared with various cationic moieties. Their densities, heats of formation, chemical energy of detonation, detonation velocities and pressures were calculated. All of the compounds possessed high positive heats of formation due to high energy contribution from the molecular backbone of the corresponding compounds. The effect of the azole rings and nitro, amino, and azido groups on their physicochemical properties was examined and discussed.