Comparative characterization of thermal isomerization rates of 6‐phenyl‐1,5‐diazabicyclo[3.1.0]hexane at convection and microwave heating | Zendy

Kornilova Tatiana A. | Zendy; Kostikov Rafael R. | Zendy; Khlebnikov Alexander F. | Zendy; Zenkevich Igor G. | Zendy

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Comparative characterization of thermal isomerization rates of 6‐phenyl‐1,5‐diazabicyclo[3.1.0]hexane at convection and microwave heating

Author(s) -

Kornilova Tatiana A.,

Kostikov Rafael R.,

Khlebnikov Alexander F.,

Zenkevich Igor G.

Publication year - 2018

Publication title -

journal of physical organic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.325

H-Index - 66

eISSN - 1099-1395

pISSN - 0894-3230

DOI - 10.1002/poc.3843

Subject(s) - chemistry , chlorobenzene , isomerization , toluene , solvent , microwave , hexane , microwave heating , reaction rate constant , atmospheric temperature range , photochemistry , thermal , convection , thermodynamics , analytical chemistry (journal) , organic chemistry , kinetics , catalysis , physics , quantum mechanics

Rate constants of thermal isomerization of 6‐phenyl‐1,5‐diazabicyclo[3.1.0]hexane into 1‐(benzyl)‐4,5‐dihydro‐1 H ‐pyrazole at convection and microwave heating in toluene and chlorobenzene (solvents) were determined within the temperature range 90°C to 120°С. These data were used for the calculation of activation parameters of isomerization. It is shown that microwave heating increases the rate constants at the same temperature by a factor of 2 to 2.5 as compared with those using convection heating. The reason is that the effective temperature of microwave heating exceeds that of convection heating by 6°C to 9°С in toluene and by 12°C to 20°С in chlorobenzene as solvent.

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