
TY  - JOUR
A1  - Hay, RW 
A1  - Porter, LJ 
T1  - Synthesis and infrared spectra of some transition metal complexes of &#945;-amino acid esters
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1967
VL  - 20
IS  - 4
SP  - 675
EP  - 683
KW  - 
UR  - https://doi.org/10.1071/CH9670675 
N2  - A variety of transition metal complexes of a-amino acid esters have been synthesized, and characterized by analysis, conductivity measurements, and infrared spectra. The complexes can be broadly divided into two groups: (a) complexes in which only a metal-nitrogen bond occurs with the &#945;-amino group of the ester, and (b) complexes in which chelate ring formation occurs via secondary donor groups on the ligand. These latter complexes are found with methyl L-histidinate, methyl &#947;-glutamate, and methyl L-cysteinate. With the exception of a methyl tryptophanate complex, the infrared spectra show that there is no interaction between the carbonyl group of the ester and the metal ion.   The visible spectra of aqueous solutions of the esters and copper(II) at a ligand/metal ratio of 5 : 1 have maxima in the 600-650 m&#956; range at pH 7 consistent with copper-nitrogen bonding only. 
ER  -

