Studies on solid-solid reactions between 4-methylbenzenamine and CuCl2 center dot 2H(2)O, CoCl2 center dot 6H(2)O, and NiCl2 center dot 6H(2)O

Dichlorobis(4-methylbenzenamine) cobalt(II), nickel(II), and copper(II) were synthesized individually via direct solid-solid reactions between 4-methylbenzenamine and CoCl2 . 6H(2)O, NiCl2 . 6H(2)O, and CuCl2 . 2H(2)O at 20 degrees C and were characterized by spectral studies, Interesting phenomena of the color change and evidently different formation rates of these reactions were observed when performed at 0 degrees C. Furthermore, the concept of ''inert'' and ''labile'' complexes is applied for the first time to explain the rates of the substitution reactions in the solid state. (C) 1997 Academic Press.