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2004
Structure
D 2000
44- 004
Synthesis, Crystal Structures and Properties of the Bis-(trimetaphosphimato)-metallates Na4{Co[(PO2NH)3]2}�H2O and Na4{Ni[(PO2NH)3]2}�H2O. ?
Single crystals of the title compounds are obtained from aqueous solutions of
Na3(PO2NH)3 and Co(NO3)2 or Ni(NO3)2 at room temperature. The isotypic compounds
crystallize in the monoclinic space group C2/c with Z = 4 at high temperature. At low
temperature a reversible phase transition occurs and the space group changes to P21/n.
The trimetaphosphimate ions act as tridentate ligands. Thus, anionic complexes
{M[(PO2NH)3]2}4- (M: Co, Ni) are formed. These structural elements are interconnected by hydrogen bonds and by coordination to Na+ resulting in a three-dimensional network. ? (CORRELL, S.; STOCK, N.; SCHNICK*, W.; Solid State Sci. 6 (2004) 9,
953-965; Fachbereich Chem., Ludwig-Maximilians-Univ., D-81377 Muenchen,
Germany; Eng.) ? W. Pewestorf
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