ZfN: Search Results

1	Author	H. Parlar, F. Korte	Requires cookie*
	Title
	Abstract	Photokinetic experiments show that a series of chlorinated octahydro-1,4-endo, endo-5,8-dimethanonaphthaline (1-4) react intramole-cular and via tripletstate to their photoisomers (1 a-4a). The formation of the compounds 1 a-4a is dependent on oxygen and nature of sensitizers.
	Reference	Z. Naturforsch. 35b, 1488—1490 (1980); eingegangen am 25. April 1980
	Published	1980
	Keywords	Cyclodiene Insecticides, Photoisomerization, Quantum Yields
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-1488_n.pdf
	Identifier	ZNB-1980-35b-1488_n
	Volume	35

2	Author	Ivo Grabchev, Vladimir Bojinov	Requires cookie*
	Title	Photoisomerization of Triazine-stilbene Fluorescent Brighteners in Solution and in their Copolymers with Styrene
	Abstract	The paper reports on the photochemical trans-cis isomerization of some new polymerizable triazine-stilbene fluorescent brighteners and their copolymers with styrene in aqueous and ethanol solutions. A dependence of trans-cis isomers in solution equilibrium and in solid polymeric films on the nature of the substituent in the triazine ring has been found.
	Reference	Z. Naturforsch. 55a, 833—836 (2000); received June 13 2000
	Published	2000
	Keywords	Photoisomerization, Triazine-stilbene, Polymerizable Fluorescent Brighteners
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	TEI-XML for	default:Reihe_A/55/ZNA-2000-55a-0833.pdf
	Identifier	ZNA-2000-55a-0833
	Volume	55

3	Author	Heinz Falk, Klaus Thirring	Requires cookie*
	Title	Beiträge zur Chemie der Pyrrolpigmente, XXXIII [1] Darstellung, Struktur und Eigenschaften von isomeren N-Methyl-Bilatrienen-abc (N-Methyl-etiobiliverdine-IV-y) On the Chemistry of Pyrrole Pigments, XXXIII [1] Synthesis, Structure and Properties of Isomeric N-Methyl-bilatrienes-abc (N-Methyl-etiobiliverdines-IV-y)
	Abstract	Methylation of etiobiliverdin-IV-y yields a ring-A N-methylated product the structure of which was proven by comparison with the corresponding monolactimether and the ring-B methylated product which was synthesized on an independent route. The configura-tion (Z,Z,Z) was deduced by iH-NMR experiments and a more or less helical conformation which is most twisted at the ring-A methine fragment was found. Photoisomerization exclusively takes place at this position giving the (E,Z,Z) diastereomer, a reaction which is discussed in terms of the correlation of light absorption, methine single bond twist and photochemical selectivity.
	Reference	Z. Naturforsch. 34b, 1448—1453 (1979); eingegangen am 25. Mai 1979
	Published	1979
	Keywords	UY-VIS, iH-NMR, Photoisomerization, Configuration, Conformation
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	TEI-XML for	default:Reihe_B/34/ZNB-1979-34b-1448.pdf
	Identifier	ZNB-1979-34b-1448
	Volume	34

4	Author	J. Schmitzer, K. Hustert, H. Parlar, F. Körte	Requires cookie*
	Title	Zur Struktur von verbrückten Photoisomeren der Cyclodieninsektizide Structure of Bridged Photoisomers of Cyclodiene Insecticides
	Abstract	Asymmetrically substituted chlorinated tetrahydro-4,7-methano-lH-indanes can be bridged photochemically into two types of isomerization products. These photoisomers can be distinguished on the basis of different geminal coupling constants in their X H NMR spectra. The structural assignment is not always certain, given only one photoisomer; it is unambiguous when both isomers are available.
	Reference	Z. Naturforsch. 35b, 502—506 (1980); eingegangen am 10. Dezember 1979
	Published	1980
	Keywords	Cyclodiene Insecticides, Photoisomerization, X H NMR Spectra
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0502.pdf
	Identifier	ZNB-1980-35b-0502
	Volume	35