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The thermal decomposition of [RuCl2(eta(6)-p-cymene)](2) (1) and its biologically active N-alkylphenothiazine compounds of composition L[RuCl3(eta(6)-p-cymene)] where L = CPH+ (2), TFH+center dot HCl (3), and TRH+ (4) (chlorpromazine hydrochloride, CP center dot HCl; trifluoperazine dihydrochloride, TF center dot 2HCl; and thioridazine hydrochloride, TR center dot HCl, respectively) has been studied. The crystal and molecular structure of compound 3 was determined earlier by single crystal X-ray diffraction analysis. The thermal data were collected by simultaneous TG/DSC measurements. For evolved gas detection, the qualitative reaction of chlorides with AgNO3 in an acidic solution was applied. The measurements were carried out in the temperature range to 700 A degrees C in nitrogen atmosphere. Compounds of L[RuCl3(eta(6)-p-cymene)] crystallize with water or water/2-propanole. On the basis of thermal data, the trend in the solvent bonding energies was assessed.

Thermal decomposition of chlorpromazine hydrochloride (CP center dot HCl), trifluoperazine dihydrochloride (TF center dot 2HCl) and thioridazine hydrochloride (TR center dot HCl), and the ruthenium complexes with dimethyl sulfoxide (dmso) of composition [RuCl(2)(dmso)(4)] and L[RuCl(3)(dmso)(3)]center dot xEtOH, L = CP center dot HCl, TF center dot 2HCl or TR center dot HCl is described. The phenothiazines are stable to temperature range of 200-280 A degrees C with an increasing stability order of TF center dot 2HCl < CP center dot HCl < TR center dot HCl. The decomposition of all the compounds takes place in superposing steps. For detection of chlorides and sulfides, EGD analysis was performed. The decomposition pattern of the complexes, due to their similar structure, is similar. The thermal data unambiguously resolve the contradiction between the elemental analysis and X-ray structural data for (TF center dot 2HCl)[RuCl(3)(dmso)(3)]Cl center dot EtOH. The compound crystallizes with one EtOH, evaporating in part at room temperature.