Synthesis, characterization and crystal structures of three dinuclear diperoxo complexes of Mo(VI): K-2{O[MoO(O-2)(2)H2O](2)}center dot 2H(2)O, (C6H8N,NH4){O[MoO(O-2)(2)H2O](2)} and (C6H8N,Na){O[MoO(O-2)(2)H2O](2)}

摘要

The crystal structures of three dinuclear diperoxo compounds have been determined from single-crystal X-ray diffraction data. All title compounds crystallize as yellow needle-shaped crystals in the triclinic space group P (1) over bar (2). (1) K-2{O[MoO(O-2)(2)H2O](2)}center dot 2H(2)O crystallizes with a = 6.2745(2), b = 9.7279(3), c = 11.2976(3) angstrom, alpha = 78.743(1), beta = 80.190(1), gamma = 73.130(1)degrees, Z = 2. (2) (2-MepyH, NH4) {O[MoO(O-2)(2)H2O](2)}, where 2-MepyH denotes 2-methylopyridine, crystallize with a = 6.733(5), b = 8.364(5), c = 13.984(5) angstrom, alpha = 73.702(5), beta = 87.647(5), gamma = 85.216(5)degrees, Z = 2. (3) (2-MepyH, Na) {O[MoO(O-2)(2)H2O](2)} crystallize with a = 6.765(5), b = 8.421(5), c = 13.815(5) angstrom, alpha = 74.203(5), beta = 84.775(5), gamma = 71.371(5)degrees, Z = 2. Results of crystal structure determination, investigations of the stability of the obtained diperoxo compounds at room temperature, and the results of IR and TG/DSC studies are presented in this paper. The dinuclear diperoxo compounds are relatively stable at room temperature, in elevated temperatures they can decompose in explosive manner.