Conformational behaviour, photochemistry and flash vacuum pyrolysis of a 2-(1H-tetrazol-1-yl)thiophene

2017 ◽  
Vol 41 (24) ◽  
pp. 15581-15589 ◽  
Author(s):  
Maria I. L. Soares ◽  
Cláudio M. Nunes ◽  
Clara S. B. Gomes ◽  
Teresa M. V. D. Pinho e Melo ◽  
Rui Fausto
Keyword(s):  
Infrared Spectroscopy ◽  
Low Temperature ◽  
Theoretical Calculations ◽  
Matrix Isolation ◽  
Flash Vacuum Pyrolysis ◽  
Fused Heterocycles ◽  
Vacuum Pyrolysis ◽  
Temperature Matrix ◽  
Photochemical Behaviour

The conformational and photochemical behaviour of a 2-(1H-tetrazol-1-yl)thiophene was studied using low-temperature matrix isolation infrared spectroscopy and theoretical calculations. FVP of 2-(1H-tetrazol-1-yl)thiophene afforded new thieno-fused heterocycles.

Pyridyl- and Pyridylperoxy Radicals – A Matrix Isolation Study

2014 ◽  
Vol 67 (9) ◽  
pp. 1324 ◽  
Author(s):  
André Korte ◽  
Artur Mardyukov ◽  
Wolfram Sander
Keyword(s):  
Density Functional Theory ◽  
Infrared Spectroscopy ◽  
Density Functional ◽  
Matrix Isolation ◽  
Ring Expansion ◽  
Peroxy Radicals ◽  
Functional Theory ◽  
Flash Vacuum Pyrolysis ◽  
Vacuum Pyrolysis ◽  
Good Agreement

The three isomeric pyridyl radicals 2a–c were synthesised using flash vacuum pyrolysis in combination with matrix isolation and characterised by infrared spectroscopy. The IR spectra are in good agreement with spectra calculated using density functional theory methods. The reaction of the pyridyl radicals 2 with molecular oxygen leads to the formation of the corresponding pyridylperoxy radicals 3a–c. The peroxy radicals 3 are photolabile, and irradiation results in syn–anti isomerisation of 3a and 3b and ring expansion of all three isomers of 3.

Degradation mechanism of γ-irradiated polytetrafluoroethylene (PTFE) powder by low-temperature matrix-isolation infrared spectroscopy and chemiluminescence spectroscopy

2016 ◽  
Vol 48 (6) ◽  
pp. 697-702 ◽  
Author(s):  
Misaki Minatoyama ◽  
Nobuyuki Akai ◽  
Emi Yamada ◽  
Tsuyoshi Noguchi ◽  
Hiroshi Ishii ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Low Temperature ◽  
Degradation Mechanism ◽  
Matrix Isolation ◽  
Temperature Matrix
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