Synthesis, Crystal Structure and Thermal Decomposition Character of an Environmentally-Friendly Energetic Coordination Compound of [Co(NH3)4(NO3)](NO3)•0.5H2O

A new coordination compound of [Co(NH3)(4)(NO3)]NO3 center dot 0.5H(2)O was synthesized by reacting Co(NO3)(2) with NH3 center dot H2O aqueous solution. It has been characterized by using elemental analysis. FT-IR technology, and X-ray single crystal diffraction analysis. It belongs to the monoclinic crystal system and P(2)/n space group with the unit cell: a=0.74618(1) nm, b=2.26114(4) nm, c=1.04282(2) nm, beta=92.038(1)degrees. The central ion Co(II) displays a stable octahedral configuration, which was constructed with the central ion Co(II), four nitrogen atoms from NH3 molecules and two oxygen atoms from NO3-. The outer sphere was NO3- and a common crystalline water molecule, which connected the inner sphere by electrostatic force and the intermolecular force. The intermolecular and intramolecular hydrogen bonds constructed a three-dimensional network structure, which increased the stability of the whole crystal structure. In addition, thermal decomposition character of the title complex was investigated by using TG-DTG, DSC and FT-IR technologies. There are two endothermic peaks and one exothermic one in the process of thermal decomposition, and the decomposition residue at 300 degrees C is the mixture of CoO and Co2O3.