Photochemistry of carboxylic acid derivatives

Coyle, J. D.

doi:10.1021/cr60312a002

Cited by 128 publications

(68 citation statements)

References 37 publications

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“…Also, organic carboxylic acids with a hydrogen bond donor and acceptor are ideally suited for the synthesis of cocrystals and coordination compounds in crystal engineering [3,4]. In our attempt to prepare the new zwitterionic bidentate ligand incorporating a 4,4'-bipyridine core with a carboxylate group [5], the title compound was unexpectedly obtained.…”

Section: Source Of Materialsmentioning

confidence: 99%

Crystal structure of 4,4'-bipyridine–chloroacetic acid (1:2), C10H8N2 · 2 C2H3ClO2, C14H14Cl2N2O4

Zhang

2013

Zeitschrift Für Kristallographie - New Crystal Structures

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Section: Source Of Materialsmentioning

confidence: 99%

Crystal structure of 4,4'-bipyridine–chloroacetic acid (1:2), C10H8N2 · 2 C2H3ClO2, C14H14Cl2N2O4

Zhang

2013

Zeitschrift Für Kristallographie - New Crystal Structures

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“…85) The ester cleavage of pyrethroid by irradiation generally proceeds at either the α-or β-bond to C=O, judging from their identified photoproducts. 86) Two benzyl radicals were formed from the type II pyrethroids through β-cleavage of the ester linkage followed by the release of carbon dioxide, and these radicals were confirmed by ESR 63,64) and LFP.…”

Section: Photo-induced Bond Cleavage 311 Carboxylic Acid Derivativmentioning

confidence: 99%

“…Aryl amides undergo the photo-Fries type α-cleavage of an N-C(=O) bond by irradiation at <290 nm; 85,89) however, this cleavage is generally a minor pathway under sunlight. In contrast, the amide bond of niclosamide was efficiently cleaved under sunlight by effective light absorption up to 450 nm due to the electron-withdrawing substituents introduced to the phenyl rings.…”

Section: Photo-induced Bond Cleavage 311 Carboxylic Acid Derivativmentioning

confidence: 99%

Direct photolysis mechanism of pesticides in water

Katagi

2018

Journal of Pesticide Science

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Photodegradation is one of the most important abiotic transformations for pesticides in the aquatic environment, and the high energy of sunlight causes characteristic reactions such as bond scission, cyclization, and rearrangement, which are scarcely observed in hydrolysis and microbial degradation. This review deals with direct photolysis via excitation of a pesticide by absorbing natural or artificial sunlight in order to know its basic photochemistry, and indirect photolysis meaning either sensitization by dissolved organic matters or oxidation by reactive oxygen species is basically excluded. Several experimental approaches including spectroscopic techniques together with theoretical calculations are first discussed from the viewpoint of the reaction mechanisms in direct photolysis. Then, the typical photoreactions of pesticides are summarized by chemical classes and/or functional groups and discussed as far as possible in relation to their mechanisms.

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“…Der Einschub der Schwefelatome verursacht einen hypsochromen Effekt, der ähnlich wie bei den entsprechenden Sauerstoffverbindungen [2] doppelt besetzten nichtbindenden Orbitale der Schwefelatome der F3CS-Gruppen mit den ^-Orbitalen der C-S-Gruppe ist die Ursache für diesen Anstieg der ersten angeregten Zustände (Singulett und Triplett) des Trithiocarbonsäurederivates (F3CS)2CS im Vergleich zum Thioketon (F3C)2CS.…”

Section: Elektronenspektrenunclassified

“…Während die Photochemie der Ester von Carbonsäuren und der Thioketone in den letzten Jahren intensiv untersucht wurde, ist über das photochemische Verhalten der Ester der Kohlensäure und der Thiokohlensäuren bisher nur wenig bekannt [1,2]. In dieser Arbeit wird das erste Beispiel für das photochemische Verhalten von perfluorierten Estern der Trithiokohlensäure in Lösung beschrieben.…”

unclassified

Photochemisches Verhalten von Bis(trifluormethylthiyl)trithiocarbonat in Lösung / Photochemical Behaviour of Bis(trifluoromethylthiyl)trithiocarbonate in Solution

Schlosser¹

1982

Zeitschrift Für Naturforschung B

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Abstract Bis(trifluoromethylthiyl)trithiocarbonate shows electronic transitions at 496 nm (nπ*), 299 nm {ππ*) and 259 (nσ*). Photolysis with 254 and 300 nm light at 200 and 309 K in pentane, and at 371 K in heptane yields a mixture of CS2 and perfluorinated compounds such as F3CSCF3, F3CSSCF3, (F3CS)3C-C(SCF3)3, (F3CS)2C=C(SCF3)2, (F3CS)3CH and F3CS-substituted solvent. The concentration of these newly formed products versus time of irradiation has been monitored. The primary photochemical process is the intramolecular decomposition into CS2 and F3CS- and F3O radicals which dimerize in a solvent cage. The formation of (F3CS)3C-C(SCF3)3 is interpreted in terms of a competition between this combination process and trapping of trifluoromethyl radicals by (FsCS)2CS, forming (F3CS)3C-, which subsequently dimerizes. On irradiation at 496 nm (nπ*) no photochemical process has been observed

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Photochemistry of carboxylic acid derivatives

Cited by 128 publications

References 37 publications

Crystal structure of 4,4'-bipyridine–chloroacetic acid (1:2), C10H8N2 · 2 C2H3ClO2, C14H14Cl2N2O4

Crystal structure of 4,4'-bipyridine–chloroacetic acid (1:2), C10H8N2 · 2 C2H3ClO2, C14H14Cl2N2O4

Direct photolysis mechanism of pesticides in water

Photochemisches Verhalten von Bis(trifluormethylthiyl)trithiocarbonat in Lösung / Photochemical Behaviour of Bis(trifluoromethylthiyl)trithiocarbonate in Solution

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