On the Coordination Behaviour of the hmta Toward Alkali Metal Cations in Presence of Perchlorate Anions

Abstract

The lithium and sodium perchlorate coordination compounds with hexamethylenetetramine of general formulas: [Li(H2O)4]+•2hmta•ClO4 − (1) and [Na(ClO4)(H2O)(hmta)]n (2) have been synthesized, characterised by elemental and thermal analysis, IR spectroscopy and X-ray crystallography. The compound 2 is a rare three dimensional hybrid compound. The obtained compounds are air stable at room temperature and well soluble in water. As a result of the different electronic properties of the ions, the compounds differ considerably in the molecular structure and consequently in the properties. The studied compounds exhibit opposite placement of both hmta molecules and perchlorate ions: in an outer and inner coordination sphere, respectively, for 1 and 2. The thermal and spectroscopic properties were correlated with the studied compounds molecular structure. The two novel coordination compounds {namely [Li(H2O)4]+•2hmta•ClO4 − and [Na(ClO4)(H2O)(hmta)]n}, of which one is a rare three dimensional hybrid compound, have been synthesized and characterised by: elemental and thermal analysis, IR spectroscopy and X-ray crystallography.