Journal
CHEMISTRYSELECT
Volume 5, Issue 7, Pages 2164-2167Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201904839
Keywords
germanium; hydrogen bonds; supramolecular chemistry; tartaric acid; 1; 10-phenantroline
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This study describes synthesis and structure features of new heterometallic mixed-ligand cation-anionic complexes {[Fe(phen)(3)][Ge-2(OH)(2)(mu-Tart)(2)]}(2) . 13H(2)O(I), [Co(phen)(3)](2)[{Ge-2(OH)(H(2)Tart)(mu-Tart)(2)}Cl] . 11H(2)O(II), [Ni(phen)(3)][Ge-2(OH)(2)(mu-Tart)(2)] . 5H(2)O(III), [Ni(phen)(3)](2)[{Ge-2(OH)(H(2)Tart)(mu-Tart)(2)}Cl] . 11H(2)O(IV) (Tart - tartaric acid, phen - 1,10-phenantroline)-potential drugs, nutritional supplements and growth stimulants. Two forms of tartratogermanate anions are selectively recognized using Fe (II), Co (II), Ni (II) 1,10-phenantroline cations as receptors. The [Ge-2(OH)(2)(mu-Tart)(2)](2-) (I, III) contains two Ge atoms bounded by two bridging tartaric acids, the coordination polyhedron of both five-coordinated Ge atoms is a trigonal bipyramid, while in the [Ge-2(OH)(H(2)Tart)(mu-Tart)(2)](3-) (II, IV) two Ge atoms have different coordination polyhedrons - trigonal bipyramid and distorted octahedron, formed through the additional terminal tartaric acid. Cations with the common formula [Me(phen)(3)](2+) (Me=Co, Fe, Ni) form the coordination polyhedron octahedron.
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