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Study of the thermal dissociation of processes of nickel(II) and cobalt(II) β-diketonate adducts

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Abstract

Thermal dissociation processes ofβ-diketonate adducts with the composition ML2 · 2B (L = acetylacetone and its substituted derivatives;M = Ni, Co;B = H2O, BuNH2CH3OH, Py, NH3) were investigated. Kinetics of dissociation were studied in a flow reactor. For dehydration processes a compensation relationship is observed (lgA=E+b), demonstrating analogous mechanisms.

A semi-quantitative series of the thermodynamic stabilities of the dihydrates is obtained from experimental data at quasi-equilibrium conditions (Q-derivatograph).

Zusammenfassung

Es wurden die thermischen Dissoziationsprozesse vonβ-Diketonataddukten der Zusammensetzung ML2 · 2B (L=Azetylazeton und dessen substituierte Abkömmlinge;M=Ni, Co;B=H2O, BuNH2, CH3OH, Py, NH3) untersucht. Die Kinetik der Dissoziation wurde in einem Flowreaktor untersucht. Als Beweis für die Ähnlichkeit der Mechanismen der Dehydrierungsprozesse konnte eine lgA=aE+b Beziehung festgestellt werden. Von unter Quasi-Gleichgewichtsbedingungen gewonnenen Daten konnte eine semiquantitative Serie der thermodynamischen Stabilitäten der Dihydrate abgeleitet werden (Q-Derivatograph).

Резюме

Изучены процессы тер мической диссоциаци и аддуктовβ-дикетонат ов состава ML2·2B (L = ацетилацетон и ег о замещенные произво дные;M= Ni, Co;B=H2O, BuNH2, CH3OH, Py, NH3). Кинетика диссоци ации исследована в проточном реакторе; д ля процессов дегидратации наблюд ается компенсационн ая зависимость (lgA=aEs+b) свиде тельствующая об аналогии в механиз ме. Полуколичественн ый ряд термодинамической у стойчивости дигидра тов получен по данным экс перимента в квазирав новесных условиях (Q-дериватогр аф).

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Logvinenko, V.A., Fedotova, N.E., Igumenov, I.K. et al. Study of the thermal dissociation of processes of nickel(II) and cobalt(II) β-diketonate adducts. Journal of Thermal Analysis 34, 259–268 (1988). https://doi.org/10.1007/BF01913392

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