Thermodynamic properties of alkaloids lappaconitine and glaucine

Bulat Kunurovich Kasenov, Zh. K. Tukhmetova, А. Ж. Абильдаева, E. V. Burdel’naya, G.K. Mukusheva, Sergazy Mynzhasarovich Adekenov, А. Ж. Турмухамбетов

2007

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DOI 10.1134/s1070427207040052
Data confidence 85 high
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Abstract

Calorimetric methods were used to study the enthalpy of solution of the alkaloids glaucine C21H25NO4 and lappaconitine C32H44N2O8 in 96% ethanol and their heat capacity in the temperature ranges 173–298.15 and 173–423 K. Equations describing the dependences ΔH sol m ∼ f( % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfKttLearuqr1ngBPrgarmWu51MyVXgatC% vAUfeBSjuyZL2yd9gzLbvyNv2CaeHbuLwBLnhiov2DGi1BTfMBaeHb% d9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbb% L8F4rqqrFfpeea0xe9Lq-Jc9vqaqpepm0xbba9pwe9Q8fs0-yqaqpe% pae9pg0FirpepeKkFr0xfr-xfr-xb9adbaqaaeGaciGaaiaadeWaaq% aadaqbaaGcbaWaaOaaaeaaimGacaWFTbaaleqaaaaa!3BE5! $$\sqrt m $$ ) (m is molal concentration) and C p 0 ∼ f( % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfKttLearuqr1ngBPrgarmWu51MyVXgatC% vAUfeBSjuyZL2yd9gzLbvyNv2CaeHbuLwBLnhiov2DGi1BTfMBaeHb% d9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbb% L8F4rqqrFfpeea0xe9Lq-Jc9vqaqpepm0xbba9pwe9Q8fs0-yqaqpe% pae9pg0FirpepeKkFr0xfr-xfr-xb9adbaqaaeGaciGaaiaadeWaaq% aadaqbaaGcbaWaaOaaaeaaimGacaWFubaaleqaaaaa!3BCC! $$\sqrt T $$ ) for the compounds under study were derived. The enthalpies of combustion, melting, and formation of C21H25NO4 and C32H44N2O8 were estimated by means of theoretical calculations.