Synthesis, structure, and complexing ability of hetarylhydrazones of glyoxylic acid
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- Popov, L.D., Mishchenko, A.V., Tupolova, Y.P. et al. Russ J Gen Chem (2011) 81: 1691. doi:10.1134/S1070363211080184
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Benzoxazolyl-, benzthiazolyl-, 2′-quinolinyl- and 1′-phthalazinylhydrazones of glyoxylic acid (H2L) and their complexes have been synthesized. The acid-base properties of the obtained hydrazones were studied by the methods of potentiometric titration and spectrophotometry. The hydrazones were shown to form mononuclear octahedral complexes M(HL)2 with Ni(II) and Mn(II) acetates, whereas with Zn(II) and Cu(II) acetates binuclear complexes M2L2 were formed. The nature of the exchange interaction between the Cu(II) ions is discussed.