- Tytuł:
- Synthesis, spectral and thermal study of (2E, 6E) 2,6-bis(4-hydroxy benzylidene)-4-R-cyclohexanone
- Autorzy:
-
Sankhavara, Dharmesh B.
Chopda, Jalpa V.
Patel, Jignesh P.
Parsania, P. H. - Powiązania:
- https://bibliotekanauki.pl/articles/1070865.pdf
- Data publikacji:
- 2019
- Wydawca:
- Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
- Tematy:
-
Chalcone
bisphenol
heat of melting
kinetic parameters
thermal stability - Opis:
- (2E,6E) 2,6-Bis(4-hydroxybenzalidene)-4-R-cyclohexanone (BHBC, R = H and MBHBC, R = CH3) was synthesized by condensing cyclohexanone/4-methylcyclohexanone with 4-hydroxy benzaldehyde using mixture of boric acid and hydrochloric acid as a catalyst at 60-70 ºC for 1 h. The structures of BHBC and MBHBC are supported by FTIR, 1HNMR, 13CNMR and MS techniques. DSC endothermic transition at 282.48 ºC (BHBC) and two endothermic transitions at 214.66 and 224.83 ºC and assigned as melting transitions. The compositions of the two isomers of MBHBC were determined from their corresponding peak areas and observed compositions are 81.5% and 18.5%, respectively for Isomer-I and Isomer-II. BHBC and MBHBC are thermally stable up to 305 ºC and 285 ºC, respectively and followed three step degradation kinetics. Both the compounds followed apparently first order degradation kinetics and were completely degraded into low molecular mass hydrocarbons.
- Źródło:
-
World Scientific News; 2019, 123; 141-160
2392-2192 - Pojawia się w:
- World Scientific News
- Dostawca treści:
- Biblioteka Nauki
Artykuł