All articles by P. H. Nielsen

27 articles

Articles in volume 17 (1963)

On the Constitution of the Addition Compounds of Tertiary Phosphines and Carbon Disulfide.

Jensen, K. A.; Nielsen, P. H.

Pages: 547-548.

DOI number: 10.3891/acta.chem.scand.17-0547
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Addition Compounds of Tertiary Phosphines and Carbon Diselenide.

Jensen, K. A.; Nielsen, P. H.

Pages: 549-550.

DOI number: 10.3891/acta.chem.scand.17-0549
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Infra-red Spectra of Dithiocarboxylates and Diselenocarboxylates.

Jensen, K. A.; Carlsen, J. B.; Holm, A.; Nielsen, P. H.

Pages: 550-551.

DOI number: 10.3891/acta.chem.scand.17-0550
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Articles in volume 19 (1965)

Reductions with Potassium Graphitate. I. Preparation of Nickel(0) Complexes of Trialkyl Phosphites.

Jensen, K. A.; Nygaard, B.; Elisson, G.; Nielsen, P. H.

Pages: 768-770.

DOI number: 10.3891/acta.chem.scand.19-0768
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Articles in volume 20 (1966)

N-Isothiocyanatoamines. I. On the Existence of Monomeric N-Isothiocyanatodialkylamines (Dialkylaminoisothiocyanates).

Anthoni, U.; Larsen, Ch.; Nielsen, P. H.

Pages: 1714-1715.

DOI number: 10.3891/acta.chem.scand.20-1714
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Articles in volume 21 (1967)

N-Isothiocyanatoamines. V. Conversion of N-Isothiocyanatodiisopropylamine to Seleno- and Tellurothiocarbazic Acid Derivatives.

Anthoni, U.; Larsen, Ch.; Nielsen, P. H.

Pages: 2571-2572.

DOI number: 10.3891/acta.chem.scand.21-2571
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N-Isothiocyanatoamines. VI. The Reactivity of N-Isothiocyanatodiisopropylamine towards Hydrogen Sulfide, Thio- and Selenoamides.

Anthoni, U.; Larsen, Ch.; Nielsen, P. H.

Pages: 2580-2581.

DOI number: 10.3891/acta.chem.scand.21-2580
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Articles in volume 22 (1968)

N-Alkoxythiocarbamoylimidazoles.

Anthoni, U.; Larsen, Ch.; Nielsen, P. H.

Pages: 1050-1051.

DOI number: 10.3891/acta.chem.scand.22-1050
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Articles in volume 23 (1969)

Thermal Fragmentations. II. N-Isothiocyanatoamines from 4,4-Disubstituted Thiosemicarbazides.

Larsen, Ch.; Anthoni, U.; Nielsen, P. H.

Pages: 320-321.

DOI number: 10.3891/acta.chem.scand.23-0320
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Thermal Fragmentations. III. Precursors to N-Isocyanatoamines.

Larsen, Ch.; Anthoni, U.; Christophersen, C.; Nielsen, P. H.

Pages: 322-324.

DOI number: 10.3891/acta.chem.scand.23-0322
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Thermal Fragmentations. IV. On the Existence of Alkoxy Isocyanates.

Larsen, Ch.; Anthoni, U.; Christophersen, C.; Nielsen, P. H.

Pages: 324-327.

DOI number: 10.3891/acta.chem.scand.23-0324
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Derivatives of Hydrazine. III. Dithio- and Diselenocarbazic Acid.

Anthoni, U.; Dahl, B. M.; Larsen, Ch.; Nielsen, P. H.

Pages: 1061-1063.

DOI number: 10.3891/acta.chem.scand.23-1061
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N-Isothiocyanatoamines. XI. The Preparation and Isomerism of O-Phenyl N,N-Diisopropylthiocarbazate.

Anthoni, U.; Larsen, Ch.; Nielsen, P. H.

Pages: 1439-1441.

DOI number: 10.3891/acta.chem.scand.23-1439
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Derivatives of Hydrazine. VI. The Structure of Thioformyl N,N-Diethylhydrazine.

Anthoni, U.; Jakobsen, P.; Larsen, Ch.; Nielsen, P. H.

Pages: 1820-1822.

DOI number: 10.3891/acta.chem.scand.23-1820
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Articles in volume 24 (1970)

Derivatives of Hydrazine. IX. Conclusive Nuclear Magnetic Resonance Evidence for the Cyclic Structure of Isopropylidenediselenocarbazic Acids.

Dahl, B. M.; Nielsen, P. H.

Pages: 1468-1470.

DOI number: 10.3891/acta.chem.scand.24-1468
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Tentative Assignment of Fundamental Vibrations of Thio- and Selenocarboxylates. I. The Dithioacetate Ion.

Jensen, K. A.; Mygind, H.; Nielsen, P. H.; Borch, G.

Pages: 1492-1495.

DOI number: 10.3891/acta.chem.scand.24-1492
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Articles in volume 25 (1971)

Force Fields of the Methylammonium Halides in the alpha-Phases.

Borch, G.; Anthoni, U.; Nielsen, P. H.

Pages: 784-787.

DOI number: 10.3891/acta.chem.scand.25-0784
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Articles in volume 31a (1977)

Vibrational Spectra of the Tris(1,2-ethanediamine)rhodium(III) Cation. I. Normal Coordinate Analysis of the Parent Compound, Three Deuterated, and Four 15N Substituted Species.

Borch, G.; Nielsen, P. H.; Klęboe, P.

Pages: 109-119.

DOI number: 10.3891/acta.chem.scand.31a-0109
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Articles in volume 32a (1978)

Tentative Assignments of Fundamental Vibrations of Thio- and Selenoamides. IV. Addition Compounds of Tetramethylthiourea with Iodine, Methyl Iodide and Metal Halides.

Borch, G.; Klęboe, P.; Nielsen, P. H.; Pedersen, L. M.

Pages: 259-265.

DOI number: 10.3891/acta.chem.scand.32a-0259
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Tentative Assignments of Fundamental Vibrations of Thio- and Selenoamides. V. Tetramethylthiouram Disulfide.

Anthoni, U.; Borch, G.; Klęboe, P.; Nielsen, P. H.

Pages: 705-714.

DOI number: 10.3891/acta.chem.scand.32a-0705
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Articles in volume 33a (1979)

Vibrational Spectra and Provisional Assignment of the Lambda(delta delta delta)-Tris(1S,2S-cyclohexanediamine)iridium(III) Cation Spectra.

Borch, G.; Klęboe, P.; Nielsen, P. H.

Pages: 19-29.

DOI number: 10.3891/acta.chem.scand.33a-0019
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Articles in volume 34a (1980)

Tentative Assignments of Fundamental Vibrations of Thio- and Selenoamides. VI. Tetramethylselenourea Dibromide and Diiodide.

Bodelsen, M.; Borch, G.; Klęboe, P.; Nielsen, P. H.

Pages: 125-139.

DOI number: 10.3891/acta.chem.scand.34a-0125
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Articles in volume 35a (1981)

Vibrational Spectra and Electronic Structure of Phosphinetriyltriacetonitrile, P(CH2CN)3.

Borch, G.; Dahl, O.; Klęboe, P.; Nielsen, P. H.

Pages: 497-508.

DOI number: 10.3891/acta.chem.scand.35a-0497
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Tentative Assignments of Fundamental Vibrations of Thio- and Selenoamides. VII. 1,2-Dimethyl-3-pyrazolidinethione, a Cyclic Thiohydrazide.

Anthoni, U.; Borch, G.; Klęboe, P.; Lerstrup, K.; Nielsen, P. H.

Pages: 767-778.

DOI number: 10.3891/acta.chem.scand.35a-0767
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Articles in volume 36a (1982)

Tentative Assignments of Fundamental Vibrations of Thio- and Selenoamides. VIII. 1,2-Dimethyl-3-pyrazolidineselone, a Cyclic Selenohydrazide. Selenation of the Thioamide Group in Theory and Practice.

Anthoni, U.; Borch, G.; Klęboe, P.; Nielsen, P. H.

Pages: 69-77.

DOI number: 10.3891/acta.chem.scand.36a-0069
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Tentative Assignments of Fundamental Vibrations of Thio and Selenoamides. IX. The Influence of Metal Complex Formation on the Characteristic Thioamide Bands in 1,2-Dimethyl-3-pyrazolidinethione.

Anthoni, U.; Borch, G.; Nielsen, P. H.

Pages: 711-718.

DOI number: 10.3891/acta.chem.scand.36a-0711
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Tentative Assignments of Fundamental Vibrations of Thio- and Selenoamides. X. The Influence of S-Methylation on the Characteristic Thioamide Bands in 1,2-Dimethyl-3-pyrazolidinethione.

Anthoni, U.; Borch, G.; Nielsen, P. H.

Pages: 797-804.

DOI number: 10.3891/acta.chem.scand.36a-0797
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