Kinetics of Monomerization or Polymerization Reaction for Bis(N-phenyl-salicylideneaminato)nickel(II) and Bis(N-methylsalicylideneaminato)nickel(II) in Solid Phase

Article abstract of DOI:10.1246/bcsj.54.3361

A kinetic investigation was carried out by means of a thermomagnetic analysis on two structural transformation reactions in solid phase: monomeric square planar-to-polymeric octahedral for Ni(N-Me-salam)2 and polymeric octahedral-to-monomeric square planar for Ni(N-Ph-salam)2.The polymerization process followed the Avrami-Erofeev equation (n=2) with E_a=303 kJ/mol and the monomerization followed the first order equation with E_a=78 kJ/mol.The thermal pyridine liberating reaction of Ni(N-Ph-salam)2py2, involving an octahedral-to-square planar transformation, has beeninvestigated isothermally found to follow the first order equation with E_a=167 kJ/mol.