N. G. Keats

Research Field

Fragmentation

10.1002/chin.198018055

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Mass spectral fragmentation pattern of 5H‐cyclopenta[2,1‐b:3,4‐b′] dipyridin‐5‐one

Journal of Heterocyclic Chemistry (1975)

N. G. Keats L. A. SUMMERS

10.1002/jhet.5570120541

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Citations (4)

Mass spectral fragmentation pattern of 2,2′‐bipyridyls Part XI. 2,2′‐Iminodipyridine

Journal of Heterocyclic Chemistry (1977)

N. G. Keats L. A. SUMMERS

Abstract The base peak in the mass spectrum of 2,2′‐iminodipyridine is due to the M‐1 ion. There are several minor fragmentation routes from the molecular ion but the principal pathway involves rupture of the central bonds. J. Heterocyclic Chem. , 14, 1103 (1977)

Fragmentation

Polyatomic ion

10.1002/jhet.5570140636

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Citations (3)

Mass Spectral Fragmentation Pattern of trans-1,2-Di-(3-pyridyl)ethylene and trans-1,2-Di(4-pyridyl)ethylene

Zeitschrift für Naturforschung B (1977)

N. G. Keats L. A. SUMMERS

The mass spectral fragmentation patterns of trans-1,2-di-(3-pyridyl)ethylene and trans- 1,2-di-(4-pyridyl)ethylene obtained on electron impact have been elucidated. They are more complex than the disintegration pathway observed with trans-1,2-di-(2-pyridyl)-ethylene.

Fragmentation

10.1515/znb-1977-1011

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Citations (3)

Mass spectral fragmentation pattern of 2,2′‐bipyridyls. Part VII 2,2′‐dithiodipyridine

Journal of Heterocyclic Chemistry (1977)

N. G. Keats L. A. SUMMERS

Abstract The mass spectral fragmentation of 2,2′ ‐dithiodipyridine involves loss of the elements S, SH and S 2 from the molecular ion in addition to rupture of the central bonds. Molecular rearrangements accompany the disintegration.

Fragmentation

Polyatomic ion

Spectral Analysis

10.1002/jhet.5570140213

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Citations (4)

Mass spectral fragmentation pattern of 4‐carboxy‐and 4‐methoxycarbonyl‐5‐methyl(or phenyl)‐2‐aryl‐2H‐1,2,3‐triazoles

Journal of Heterocyclic Chemistry (1987)

N. G. Keats Shyam Singh L. A. SUMMERS

Abstract 4‐Carboxy‐5‐methyl‐2‐aryl‐2 H ‐1,2,3‐triazoles undergo considerable fragmentation on electron impact including loss of OH and H 2 O from the molecular ions and rupture of the triazole ring. 4‐Carboxy‐5‐phenyl‐2‐aryl‐2 H ‐1,2,3‐triazoles, on the other hand, show no loss of H 2 O from the molecular ions.

Fragmentation

Polyatomic ion

Triazole

10.1002/jhet.5570240424

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Citations (4)

ChemInform Abstract: MASS SPECTRAL FRAGMENTATION PATTERN OF 2,2′‐BIPYRIDYLS. PART III. 2‐(2‐PYRIDYL)QUINOLINE AND 2,2′‐BIQUINOLINE

Chemischer Informationsdienst (1977)

N. G. Keats L. A. SUMMERS

Quinoline

Fragmentation

10.1002/chin.197711227

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ChemInform Abstract: Mass Spectral Fragmentation Pattern of 2,3‐Dimethyl‐ and 2‐Methyl‐3‐ phenyl‐ 4‐arylazoisoxazol‐5‐ones.

Chemischer Informationsdienst (1986)

N. G. Keats S. K. SINGH L. A. SUMMERS

Fragmentation

10.1002/chin.198631065

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Mass spectral fragmentation pattern of 2,2′‐Bipyridyls. Part IX. 6‐Alkoxy‐2,2′‐bipyridyls

Journal of Heterocyclic Chemistry (1977)

N. G. Keats L. A. SUMMERS

Abstract The mass spectral fragmentation patterns of 6‐methoxy‐, 6‐ethoxy‐ and 6‐propoxy‐2,2 ′‐bipyridyls are reported. The base peaks in the spectra of both the 6‐methoxy and 6‐ethoxy compounds are due to the M‐lion of 6‐methoxy‐2,2′‐bipyridyl, while the base peak with 6‐propoxy‐2,2‐ bipyridyl is due to a species formed by loss of C 3 H 6 from the molecular ion.

Fragmentation

Base (topology)

Polyatomic ion

10.1002/jhet.5570140404

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Citations (4)

ChemInform Abstract: MASS SPECTRAL FRAGMENTATION PATTERN OF 3‐METHYL‐4‐ARYLAMINOMETHYLENEISOXAZOL‐5‐ONES

Chemischer Informationsdienst (1981)

N. G. Keats L. A. SUMMERS

Fragmentation

10.1002/chin.198113054

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