Author

Steen Hammerum

Observed names: Hammerum, Steen, S, HAMMERUM, S. HAMMERUM, S. Hammerum, STEEN HAMMERUM, Steen. Hammerum

Observed institutions: University of Copenhagen, École Polytechnique, La Trobe University, Bielefeld University, UNSW Sydney, Laboratoire de Synthèse Organique, University of Amsterdam, Stanford University

ORCID: 0000-0002-4766-3077

Observed ORCID: 0000-0002-4766-3077

OpenAlex ID: A5010769542

Distonic radical cations in gaseous and condensed phase

1988 · Steen Hammerum · Mass Spectrometry Reviews · 327

Mass spectrometry in structural and stereochemical problems

1975 · Steen Hammerum, Carl Djerassi · Steroids · 309

Investigating the α-Effect in Gas-Phase SN2 Reactions of Microsolvated Anions

2013 · Ditte L. Thomsen, Jennifer N. Reece, et al. · Journal of the American Chemical Society · 72

Catalysed isomerization of simple radical cations in the gas phase

1994 · Henri E. Audier, Danielle Leblanc, et al. · Journal of the Chemical Society Chemical Communications · 57

Alkyl Radicals as Hydrogen Bond Acceptors: Computational Evidence

2009 · Steen Hammerum · Journal of the American Chemical Society · 53

Heats of formation and proton affinities by the G3 method

1999 · Steen Hammerum · Chemical Physics Letters · 49

Experimental verification of the intermediacy and interconversion of ion–neutral complexes as radical cations dissociate

1988 · Steen Hammerum, Henri Edouard Audier · Journal of the Chemical Society Chemical Communications · 49

Experimental and Theoretical Evaluation of Proton Affinities of Furan, the Methylphenols, and the Related Anisoles

2004 · Eric S. E. van Beelen, Tehila A. Koblenz, et al. · The Journal of Physical Chemistry A · 46

Distonic ions as reacting species

1988 · Thomas. Bjoernholm, Steen. Hammerum, et al. · Journal of the American Chemical Society · 42

The Proton Affinities of Imines and the Heats of Formation of Immonium Ions Investigated with Composite ab Initio Methods

1999 · Steen Hammerum, Theis I. Sølling · Journal of the American Chemical Society · 41

Bimolecular reactions of distonic ions: Proton transfer and hydrogen atom abstraction with ˙CH2OH2+

1993 · Philippe Mourgues, Henri Edouard Audier, et al. · Organic Mass Spectrometry · 38

Formation and stabilization of intermediate ion–neutral complexes in radical cation dissociation reactions

1988 · Steen Hammerum · Journal of the Chemical Society Chemical Communications · 38

Rearrangement and hydrogen abstraction reactions of amine cation radicals: a gas-phase analogy to the Hofmann-Löffler-Freytag reaction

1981 · Steen Hammerum · Tetrahedron Letters · 35

The α-Effect in Gas-Phase SN2 Reactions of Microsolvated Anions: Methanol as a Solvent

2013 · Ditte L. Thomsen, Jennifer N. Reece, et al. · The Journal of Physical Chemistry A · 32

Mass spectrometry in structural and stereochemical problems. CCXXXIII. Stereochemical dependence of the retro-Diels-Alder reaction

1973 · Steen. Hammerum, Carl. Djerassi · Journal of the American Chemical Society · 31

The proton affinities of saturated and unsaturated heterocyclic molecules

2006 · Samira Kabli, Eric S.E. van Beelen, et al. · International Journal of Mass Spectrometry · 30

Secondary hydrogen isotope effects on simple cleavage reactions in the gas phase. The .alpha.-cleavage of tertiary amine cation radicals

1988 · Steen. Ingemann, Steen. Hammerum, et al. · Journal of the American Chemical Society · 29

Isomers of Amine Molecular Ions; The Structures of C2H7N+. and related radical cations

1984 · Steen Hammerum, Dietmar Kuck, et al. · Tetrahedron Letters · 28

Slow alkyl, alkene, and alkenyl loss from primary alkylamines

1983 · Steen Hammerum, Jørn B. Christensen, et al. · International Journal of Mass Spectrometry and Ion Physics · 28

Formation of Proton-Bound Dimers as the Driving Force for Alkyl Radical Loss in the Gas Phase Reactions of Radical Cations

1996 · Henri Edouard Audier, Jacques Fossey, et al. · The Journal of Physical Chemistry · 25

The α-Effect and Competing Mechanisms: The Gas-Phase Reactions of Microsolvated Anions with Methyl Formate

2013 · Ditte L. Thomsen, Charles M. Nichols, et al. · Journal of the American Society for Mass Spectrometry · 24

Hydrogen Bonding to Alkanes: Computational Evidence

2009 · Solveig Gaarn Olesen, Steen Hammerum · The Journal of Physical Chemistry A · 24

Intramolecular Hydrogen Bonding and Hydrogen Atom Abstraction in Gas-Phase Aliphatic Amine Radical Cations

2005 · Steen Hammerum, Christian B. Nielsen · The Journal of Physical Chemistry A · 24

Alkane loss from the molecular ions of alcohols, ketones, and amines in the μsec timeframe

1983 · Steen Hammerum, Kevin F. Donchi, et al. · International Journal of Mass Spectrometry and Ion Physics · 24

Electron impact induced fragmentations mimicking retro-1,3-dipolar cycloadditions

1972 · Steen Hammerum, Peder Wolkoff · The Journal of Organic Chemistry · 22

Works count: 137

Citation count: 2,063

H-index: 24

I10-index: 53