Abstract
Abstract The thermal decomposition reactions of [Cr(NH3)6]Cl3, [CrCl(NH3)5]Cl2 and cis-[CrCl2-(NH3)4]Cl in solid state were studied by the manometric, infrared spectroscopic and reflectance spectroscopic methods. The decomposition of these complexes in vacuum was initiated by substitution of an outer-sphere chloride ion for a coordinated ammonia. The rate constants, activation energies and activation entropies of these substitution reactions were obtained and the possible reaction processes were discussed. The products cis,cis-[CrCl3(NH3)3] and cis,trans-[CrCl3(NH3)3] were obtained on the heating of cis-[CrCl2(NH3)4]Cl.
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