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Mass spectrometry of pyrrolo [2, 3- b] pyrazines and pyrazino [2, 3- b]indole (1977)

Clark, B. A. J. ; Parrick, J.

Chichester : Wiley-Blackwell

Biological Mass Spectrometry 12 (1977), S. 421-423

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ISSN: 0030-493X

Keywords: Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The first mass spectra of pyrrolo [2, 3-b] pyrazine and some of its derivatives and of pyrazino [2, 3-b] indole are reported and compared with those of related compounds. Differences between the spectra of some aryl substituted derivatives are described and discussed.

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/oms.1210120703

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Bond polarizability calculations of the Raman optical activity of (R)-(+)-3-Methylcyclohexanone (1982)

Barron, L. D. ; Clark, B. P.

Chichester [u.a.] : Wiley-Blackwell

Journal of Raman Spectroscopy 13 (1982), S. 155-159

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ISSN: 0377-0486

Keywords: Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Physics

Notes: The bond polarizability theory of Raman optical activity is used to calculate the complete Raman optical activity spectrum of (R)-(+)-3-methylcyclohexanone. The results are compared with the observed depolarized Raman circular intensity difference spectrum in the region 50-1800 cm-1. The predictions are better in the upper half of this range probably because at lower frequency the calculated normal coordinates are less reliable and the contributions from carbonyl deformations increase.

Additional Material: 1 Ill.