All articles by Erik Helgstrand

7 articles

Articles in volume 18 (1964)

Isotope Effect of Hydrogen in the Bromination of 1,3,5-Trimethoxybenzene with N-Bromosuccinimide in Dimethylformamide.

Helgstrand, Erik

Pages: 1616-1622.

DOI number: 10.3891/acta.chem.scand.18-1616
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Articles in volume 19 (1965)

Primary Hydrogen Isotope Effects in the Bromination of 2-Bromo-1,3,5-trimethoxybenzene and 2,4-Dibromo-1,3,5-trimethoxybenzene. Proximity Effects of Bromine.

Helgstrand, Erik

Pages: 1583-1590.

DOI number: 10.3891/acta.chem.scand.19-1583
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Articles in volume 20 (1966)

Primary Hydrogen Isotope Effects in the Nuclear Bromination of 1,3,5-Trimethoxy-2-methylbenzene and 1,3,5-Trimethoxy-2,4-dimethylbenzene.

Helgstrand, Erik; Nilsson, Åke

Pages: 1463-1469.

DOI number: 10.3891/acta.chem.scand.20-1463
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Articles in volume 21 (1967)

A Tetracyclic Condensation Product from 3-Methyl-2-pyrazolin-5-one.

Björkqvist, Bo; Helgstrand, Erik; Stjernström, Nils E.

Pages: 2295-2295.

DOI number: 10.3891/acta.chem.scand.21-2295
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Articles in volume 24 (1970)

A Study of the Structures of Intermediates in the Reaction of 1,3-Diketones and Hydrazines.

Hedbom, Christina; Helgstrand, Erik

Pages: 1744-1748.

DOI number: 10.3891/acta.chem.scand.24-1744
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CNDO/2 Calculations on Planar and Non-planar Conformations of Anisole, Ethylbenzene, and their Ortho Proton sigma-Complexes.

Helgstrand, Erik

Pages: 3687-3696.

DOI number: 10.3891/acta.chem.scand.24-3687
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Articles in volume 26 (1972)

Model Calculations on the Geometry of the Benzene Proton sigma-Complex and Its Relation to the Mills-Nixon Effect.

Helgstrand, Erik

Pages: 2024-2030.

DOI number: 10.3891/acta.chem.scand.26-2024
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