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Synthesis, Crystal Structure and Thermal Decomposition Character of an Environmentally‐Friendly Energetic Coordination Compound of [Co(NH 3 ) 4 (NO 3 )](NO 3 )·0.5H 2 O
Author(s) -
Wang Kun,
Zhang Jianguo,
Chen Taoping,
Zhang Tonglai,
Yang Li
Publication year - 2010
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201090174
Subject(s) - chemistry , crystallography , crystal structure , molecule , monoclinic crystal system , thermal decomposition , intramolecular force , intermolecular force , coordination sphere , hydrogen bond , endothermic process , thermal stability , inorganic chemistry , adsorption , stereochemistry , organic chemistry
A new coordination compound of [Co(NH 3 ) 4 (NO 3 )]NO 3 ·0.5H 2 O was synthesized by reacting Co(NO 3 ) 2 with NH 3 ·H 2 O 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, β =92.038(1) °. The central ion Co(II) displays a stable octahedral configuration, which was constructed with the central ion Co(II), four nitrogen atoms from NH 3 molecules and two oxygen atoms from NO − 3 . The outer sphere was NO − 3 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°C is the mixture of CoO and Co 2 O 3 .