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Group II B Metal Complexes with N‐Benzoylglycine (Hippuric Acid) and their Amine Adducts
Author(s) -
Marcotrigiano Giuseppe,
Pellacani Gian Carlo
Publication year - 1975
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19754150311
Subject(s) - chemistry , denticity , ethylenediamine , hippuric acid , medicinal chemistry , pyridine , morpholine , zinc , amine gas treating , adduct , piperidine , coordination complex , metal , stereochemistry , inorganic chemistry , organic chemistry , urine , biochemistry
Zn(II), Cd(II) and Hg(II) complexes with N‐benzoylglycine (Hippuric acid) (abbreviation HHippu) and their amine adducts are of the type M(Hippu) 2 . H 2 O, M(Hippu) 2 , M(Hippu) 2 . B (M = Zn, Cd and Hg, and B = piperazine, 1, 10‐phenantroline; M = Zn and B = Pyridine; M = Hg and B = ethylenediamine), M(Hippu) 2 • 2B (B = N‐methylpiperazine, piperidine, morpholine and pyridine) and M(Hippu) 2 •3B (M = Zn, Cd and B = ethylenediamine). The amine and amino‐acid coordination are investigated with the infrared spectra. The monohydrate and anhydrous bis(hippurate)metal(II) have identical i.r. spectra, indicating that the water molecule is not coordinated to the metal ions. A monodentate coordination of the amino acid is found in the amine adducts of Zinc(II), while in those of Cadmium(II) and Mercury(II)a symmetrical or asymmetrical bidentate coordination through the (COO − ) group is suggested and a pseudooctahedral configuration proposed. Only in monohydrate, anhydrous and monopyridine bis(hippurate) Zinc(II) (with the lowering of the ν (NH) of the NH‐group of the N‐benzoylglycine) does this group appear to be involved in the metal coordination.