Optical Rotatory Dispersion Studies. XLVIII.<sup>1</sup> The Nitroso Chromophore<sup>2</sup>

Djerassi, Carl; LUND, E. F.; Bunnenberg, E.; Sjöberg, Bertil

doi:10.1021/ja01471a021

Cited by 22 publications

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“…75 The absorption bands in the region of 390 ± 435 nm typical of N-nitroso amides were observed in the UV spectra of PCA films stored in an NO 2 atmosphere. 76 IR studies showed that the intensity of the band at 3293 cm 71 assigned to the stretching vibrations of hydrogen-bonded N7H groups decreases on storage of thin PCA films in an NO 2 (4610 75 to 4610 74 mol litre 71 ) atmosphere. The intensities of the bands at 1642 and 1563 cm 71 also decrease.…”

Section: Reactions Of Nitrogen Dioxide With Polyamides Polyurethanes ...mentioning

confidence: 99%

Reactions of nitrogen oxides with polymers

Pariiskii¹,

Gaponova²,

Davydov³

2000

Russ. Chem. Rev.

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The mechanisms of the reactions of nitrogen oxides and The mechanisms of the reactions of nitrogen oxides and different classes of solid polymers are considered. Particular different classes of solid polymers are considered. Particular emphasis is given to the analysis of the mechanisms of the emphasis is given to the analysis of the mechanisms of the formation of stable nitroxyl radicals. Double bonds and amide formation of stable nitroxyl radicals. Double bonds and amide groups of macromolecules, as well as hydroperoxides and per-groups of macromolecules, as well as hydroperoxides and peroxide macroradicals are shown to be involved in the reactions with oxide macroradicals are shown to be involved in the reactions with nitrogen oxides. The application of nitrogen oxides for the nitrogen oxides. The application of nitrogen oxides for the preparation of spin-labelled polymers and the use of the ESR preparation of spin-labelled polymers and the use of the ESR imaging technique (ESR tomography) for the investigation of the imaging technique (ESR tomography) for the investigation of the structure of the reaction front during nitration of solid polymers structure of the reaction front during nitration of solid polymers are considered. The bibliography includes 111 references are considered. The bibliography includes 111 references. .

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Section: Reactions Of Nitrogen Dioxide With Polyamides Polyurethanes ...mentioning

confidence: 99%

Reactions of nitrogen oxides with polymers

Pariiskii¹,

Gaponova²,

Davydov³

2000

Russ. Chem. Rev.

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Optical rotatory dispersion studies, IL. Über Trithione, XV: Die anomale Rotationsdispersion optisch aktiver Terpen‐trithione

Djerassi

Lüttringhaus

1961

Chem. Ber.

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Das (+)‐Campho‐trithion (I) hat (in Isooctan) ein typisches Trithion‐Absorptionsspektrum mit Maxima bei 225, 248, 281, 342 und 417 mμ sowie einer schwachen Schulter bei etwa 495 mμ. Trotz der hohen Extinktion von I gelang die Messung der vollständigen Rotationsdispersionskurve zwischen 650 und 260 mμ; sie zeigt eine Serie von 4 positiven Cotton‐Effekten, in der Lage entsprechen den 4 langwelligsten Maxima der Absorptionskurven, die somit alle aktiv sind. Analog verhält sich das aus (+)‐α‐Pinen gewonnene Trithion (II) mit 4 negativen Cotton‐Effekten.

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