X-ray structure determination of bis{(-[N-(2-[2-hydroxyethylamino]ethyl)salicylaldiminato]-perchlorate cadmium(II))}monohydrate ([(Cd sadol ClO 4 ) 2 ].H 2 O) and two modifications of bis{(-[N-(2-[2-hydroxyethylamino]ethyl)salicylaldiminato]-perchlorate cadmium(II))} ([(Cd sadol ClO 4 ) 2 ])

Add time:09/26/2019    Source:infona.pl

Preparations and the X-ray structure determinations of the compound bis{(-[N-(2-[2-hydroxyethylamino]ethyl)salicylaldiminato]-perchlorate cadmium(II))} monohydrate [{Cd(C 1 1 H 1 5 N 2 O 2 )(ClO 4 )} 2 ].H 2 O ([(Cd sadol ClO 4 ) 2 ].H 2 O) and of two modifications of bis{(-[N-(2-[2-hydroxyethylamino]ethyl)salicylaldiminato]-perchlorate cadmium(II))} [{Cd(C 1 1 H 1 5 N 2 O 2 )(ClO 4 )} 2 ] ([(Cd sadol ClO 4 ) 2 ]) were carried out. (Hsadol is the abbreviation for N-[2-(2-hydroxyethylamino)ethyl]salicylaldimine.) In each of these compounds Cd is coordinated by three N and three O atoms in a strongly distorted octahedron. Each perchlorate anion is coordinated by one oxygen to a Cd atom. The hydrated molecule is the first known compound where Cd is coordinated by perchlorate and not coordinated by water though water is present. Water is an acceptor of a moderate hydrogen bond. Water can be drawn out from [(Cd sadol ClO 4 ) 2 ].H 2 O by careful heating and desiccation while the structure transforms into phase α of [(Cd sadol ClO 4 ) 2 ]. On the other hand phase α can absorb water at room temperature easily, transforming into the original monohydrate. Both compounds - the monohydrate and the phase α - can be considered as extreme representatives of the series which differ by degree of hydration.

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