Complexation kinetics of sarcosine with nickel(II), cobalt(II), and copper (II)

The kinetics of sarcosine complexation with nickel(II), cobalt(II), and copper(II) have been determined by temperature jump. The reactions were of the type ML -1 + L sec . The cobalt kinetics follow the dissociative mechanism for sarcosine. However, in the nickel complexation kinetics, formation of the mono and bis complexes appears to be relatively slow, indicating that the N-bonded methyl group in sarcosine has an influential role. As observed with cobalt, formation of the copper-sarcosinate complex is normal. Unlike cobalt, the formation of the bis complex is relatively slow.