Photochemical studies, XLVI: Photochemistry of isopropylaminophenazone in the solid state and in aqueous solution
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Reisch,Ekiz,Guneri
p. 973 - 977
(2007/10/02)
ETUDE EXPERIMENTALE ET THEORIQUE DE LA PHOTOLYSE DE DERIVES DU CYCLE PYRAZOLONE
When irradiated in protic solvents such as water and primary alcohols, pyrazolinone derivatives undergo photocleavage between the two nitrogen atoms.Substituting the C-4 atom with an electronegative group stabilizes the open chain which is obtained but a thermal transposition takes place from the linear intermediate when C-4 carries a hydrogen atom or a methyl group.The STO/3G ab initio scheme was used to study the photocleavage and the influence of the C-4 substituent, giving evidence of a mechanism which involves triplet excited states of the ?, ?* type.
Cardy, H.,Poquet, E.
p. 2279 - 2286
(2007/10/02)
Photolysis of 4 amino, 4 alkoxy and 4 hydroxy 2,3 dimethyl 1 phenyl 3 pyrazolin 5 ones
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Reisch,Fitzek
p. 215 - 221
(2007/10/08)
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