P. Vojtisek, J. Rohovec, I. Lukeš
1997
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0
Influential Citations
3
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Journal
Collection of Czechoslovak Chemical Communications
Abstract
Complexes [Hg(bipyP 2 )Br 2 ] ( 2 ), [Hg(bipyP 2 )BrCl] ( 3 ), and [Hg(bipyP 2 )Cl 2 ] ( 4 ), where bipyP 2 is tetraethyl 2,2'-bipyridyl-4,4'-diphosphonate ( 1 ), were prepared and their crystal structures were determined. Coordination of the phosphonate group was only found in 4 . In this compound, the coordination sphere of Hg(II) contains two Cl atoms, two N atoms from the bipyridine chelate and O atom from phosphonate group and thus, the coordination number is five. The presence of Br atoms in the coordination sphere of complexes 2 and 3 results in the formation of tetrahedral environment (coordination number four) without any interaction with phosphonate. The coordination of the phosphonate group in 4 was also confirmed by IR spectroscopy.