Nickel complexes aspartic acid

More detailed studies of reactions of this type have been reported.96,97 Nickel(II) complexes of histidine and tryptophan provide stereoselectivity in the hydrolysis of histidine methyl ester, but stereoselectivity is not observed with nickel(Il) complexes of aspartic acid or methionine. Only tridentate ligands with a minimum steric bulk appear to be capable of exhibiting stereoselectivity in reactions of this type. 

The rate constants for the reaction of [Ni(nta)(H20)a] with various ligands in their neutral and protonated forms have been reported, as has that for the formation of the bis-complex of nickel(n) with the purine base theophylline. Rate constants have also been reported for the formation of bis-complexes of cobalt(n), nickel(n), and copper(n) with L-proline, L-hydroxypyroline, glycyl-L-leucine, , L-Ieucylglycine, a-alanine, jS-alanine, iminodiacetic acid, iminodipropionic acid, and aspartic acid. ... 

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