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Author:Undheim, K.

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21 matching references were found.

Hvistendahl, G.; Undheim, K., Ionization potentials of stable free radicals, Chem. Scr., 1971, 1, 123. [all data]

Gronneberg, T.; Undheim, K., Mass spectrometry of onium compounds. X: on the evaporation of pyridinium-3-oxides-ionization potential measurements, Org. Mass Spectrom., 1972, 6, 225. [all data]

Gronneberg, T.; Undheim, K., Mass spectrometry of onium compounds. XI: ionization potentials of hydroxy and mercapto pyridines, Org. Mass Spectrom., 1972, 6, 823. [all data]

Hvistendahl, G.; Undheim, K., Mass spectrometry of onium compounds. Part XIV. Methiodides of methyl pyridylacetates, J. Chem. Soc. Perkin Trans. 2, 1972, 14, 2030. [all data]

Hvistendahl, G.; Undheim, K., Mass spectrometry of onium compounds. IX: on the evaporation of anilinium oxides. Ionization potential measurements, Org. Mass Spectrom., 1972, 6, 217. [all data]

Fjeldstad, P.E.; Undheim, K., Mass spectrometry of onium compounds. XXX. Ionisation potential in structural assignment of some gaseous molecules, Org. Mass Spectrom., 1973, 7, 639. [all data]

Gronneberg, T.; Undheim, K., Mass spectrometry of onium compounds - XV. ionization potentials of amino pyridines, Tetrahedron Lett., 1973, 3193. [all data]

Hvistendahl, G.; Undheim, K.; Gyorosi, P., Mass spectrometry of tropylium halides, Org. Mass Spectrom., 1973, 7, 903. [all data]

Gronneberg, T.; Hurum, T.; Undheim, K., Ionisation potentials in structure analysis of gaseous hydroxypyridine 1-oxides, Acta Chem. Scand., Ser. B, 1974, 28, 986. [all data]

Thorstad, O.; Undheim, K., Mass spectrometry of onium compounds. XXIV. Ionisation potential in structure analysis of pyridodiazo-oxides, Chem. Scr., 1974, 6, 222. [all data]

Thorstad, O.; Undheim, K.; Hvistendahl, G., Mass spectrometry of onium compounds. XXIII. Ionisation potentials in the structural assignment of [M-N2]ions from diazo-oxides, Org. Mass Spectrom., 1974, 9, 548. [all data]

Undheim, K.; El-Gendy, M.A.F.; Hurum, T., Mass spectrometry of onium compounds. XXVI. Ionisation potentials in structure analysis of gaseous aminopyridine 1-oxides, Acta Chem. Scand., Ser. B, 1974, 28, 743. [all data]

Gyorosi, P.; Hvistendahl, G.; Undheim, K., Mass spectrometry of some triphenylcyclopropenium salts. Competition between dimerisation and adduct formation, Org. Mass Spectrom., 1975, 10, 744. [all data]

Hansen, P.E.; Undheim, K., Mass spectrometry of onium compounds. XXIX. Ionisation potential in structure analysis of valence isomers, Acta Chem. Scand., Ser. B, 1975, 29, 221. [all data]

Thorstad, O.; Undheim, K.; Cederlund, B.; Hornfeldt, A.-B., Ionisation potentials in tautomeric analysis of 2-hydroxy derivatives of thiophenes, selenophenes, and furans, Acta Chem. Scand. Ser. B:, 1975, 29, 647. [all data]

Thorstad, O.; Undheim, K.; El-Gendy, M.A.F., Ionisation potentials in structure analysis of isomeric nitrones, oxaziranes, O-ether oximes acid amides, Org. Mass Spectrom., 1975, 10, 1155. [all data]

Thorstad, O.; Undheim, K.; Lantz, R.; Hornfeldt, A.-B., Ionisation potentials in tautomeric analysis of 3-hydroxy derivatives of thiophenes, selenophenes, and furans, Acta Chem. Scand., Ser. B, 1975, 29, 652. [all data]

Cederlund, B.; Lantz, R.; Hornfeldt, A.-B.; Thorstad, O.; Undheim, K., Preparation of some thiophene-, selenophene- and furanthiols. Ionisation potentials in tautomer analysis, Acta Chem. Scand. Ser. B:, 1977, 31, 198. [all data]

Gacek, M.; Thorstad, O.; Ongstad, L.; Undheim, K., Ionisation potentials in tautomer analysis of 2-hydroxypyrimidines, Chem. Scr., 1978, 13, 99. [all data]

Laerum, T.; Undheim, K., N-Quaternary compounds. Part 52. Photochemically induced valence bond isomerism and rearrangement to pyridinones of thiazolo[3,2-a]-pyridinium-8-olate derivatives, J. Chem. Soc. Perkin Trans. 1, 1978, 1150. [all data]

Pedersen, A.H.; Undheim, K., N-Quaternary compounds. Part LIX. Facile synthesis of 3-vinyl-4(3H)-pyrimidinethiones, J. Heterocycl. Chem., 1984, 21, 1149. [all data]