Relevant bibliographies by topics / Deuterium. Rearrangements (Chemistry) Dideuteriobiscyclopropylidene

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Academic literature on the topic 'Deuterium. Rearrangements (Chemistry) Dideuteriobiscyclopropylidene'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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Journal articles on the topic "Deuterium. Rearrangements (Chemistry) Dideuteriobiscyclopropylidene"

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Bender, Christopher Owen, Douglas Dolman, Jeremy Christian Foesier, Sherry Lee Lawson, and Kathryn Elvia Preuss. "The differing mechanisms of photo-formation of 7-cyanobenzocyclooctatetraene from 7- and 6-cyano-2,3-benzobicyclo[4.2.0]octa-2,4,7-triene." Canadian Journal of Chemistry 81, no. 1 (2003): 37–44. http://dx.doi.org/10.1139/v02-204.

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It is known that 7-cyanobenzocyclooctatetraene (COT 2) is a product of the thermolysis and direct photolysis of 7- and 6-cyano-2,3-benzobicyclo[4.2.0]octa-2,4,7-triene (1 and 5), though the mechanisms of these rearrangements have not been reported. In the present study experiments have been carried out using the deuterium-labelled trienes 1a (93%-d1 at C-6) and 5a (93%-d1 at C-8), which were formed from 2π + 2π photo-closure (direct irradiation) of COT 2a labelled at C-8. The results reveal that whereas the thermolysis of 1a and 5a and the direct irradiation of 5a reform COT 2a, probably via c
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2

Davies, Paul W., Nicolas Martin, and Neil Spencer. "Isotopic labelling studies for a gold-catalysed skeletal rearrangement of alkynyl aziridines." Beilstein Journal of Organic Chemistry 7 (June 21, 2011): 839–46. http://dx.doi.org/10.3762/bjoc.7.96.

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Isotopic labelling studies were performed to probe a proposed 1,2-aryl shift in the gold-catalysed cycloisomerisation of alkynyl aziridines into 2,4-disubstituted pyrroles. Two isotopomers of the expected skeletal rearrangement product were identified using 13C-labelling and led to a revised mechanism featuring two distinct skeletal rearrangements. The mechanistic proposal has been rationalised against the reaction of a range of 13C- and deuterium-labelled substrates.
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3

Bender, Christopher Owen. "Mechanistic variations in the formation of benzocyclooctatetraene from benzobicyclo[4.2.0]octa-2,4,7-triene." Canadian Journal of Chemistry 74, no. 1 (1996): 32–37. http://dx.doi.org/10.1139/v96-004.

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Benzocyclooctatetraene (i.e., COT, 2) is the major product from the thermolysis and direct photolysis of 2,3-benzobicyclo[4.2.0]octa-2,4,7-triene (i.e., triene 1). It is also a minor product from the sensitized irradiation of 1. The mechanism of the reaction 1 → 2 was investigated using deuterium-labelled triene (i.e., 1a/b), which was prepared in a two-step procedure from a known triene mixture (1a) containing deuterium at both C-4 (43%) and C-5 (97%): the thermolysis of 1a led to labelled COT 2a, which upon direct irradiation (λ ≥ 310 nm) gave the deuterated triene mixture 1a/b in good chemi
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4

Nickon, Alex, Martin C. Ilao, Alfred G. Stern, and Michael F. Summers. "Hydrogen trajectories in alkene-to-carbene rearrangements. Unequal deuterium isotope effects for the axial and equatorial paths." Journal of the American Chemical Society 114, no. 23 (1992): 9230–32. http://dx.doi.org/10.1021/ja00049a090.

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5

Baldwin, John E., and V. Prakash Reddy. "Kinetics and deuterium kinetic isotope effects for the thermal [1,7] sigmatropic rearrangements of cis,cis-1,3,5-octatriene." Journal of the American Chemical Society 109, no. 26 (1987): 8051–56. http://dx.doi.org/10.1021/ja00260a017.

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6

Bender, Christopher Owen, Donald Laverne Bengtson, Douglas Dolman, and Seamus Francis O'Shea. "The photochemistry of 6- and 7-cyano-2,3-benzobicyclo[4.2.0]octa-2,4,7-triene." Canadian Journal of Chemistry 64, no. 2 (1986): 237–45. http://dx.doi.org/10.1139/v86-041.

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The direct irradiation of 7-cyanobenzocyclooctatetraene (5) led to 6- and 7-cyano-2,3-benzobicyclo[4.2.0]octa-2,4,7-triene (7 and 8; Φ7 = Φ8 < 0.0001). On direct irradiation, 7 gave 1-cyanobenzosemibullvalene (6; Φ = 0.19), 5 (Φ = 0.022), and 2-cyanonaphthalene (Φ = 0.04), whereas 8 gave 7-cyanobenzosemibullvalene (16; Φ = 0.03), 5 (Φ = 0.22), naphthalene (Φ = 0.12), and 4-cyano-7,8-benzotetracyclo[3.3.0.02,4.03,6]oct-7-ene (17, Φ = 0.03). Upon sensitized irradiation, 7 gave 6 (Φ = 0.68) and 2-cyanonaphthalene (Φ = 0.007), while 8 gave 16 (Φ = 0.01) and naphthalene (Φ = 0.52). Deuterium lab
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7

Speranza, Maurizio, and Antonello Filippi. "Wagner-Meerwein Rearrangements in the Gas Phase: Deuterium Isotope Effects on Acid-Induced Dissociation of Optically Active Phenylpropanols." Chemistry - A European Journal 5, no. 3 (1999): 845–53. http://dx.doi.org/10.1002/(sici)1521-3765(19990301)5:3<845::aid-chem845>3.0.co;2-8.

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8

Granata, Alessandro, Françoise Sauriol та Arthur S. Perlin. "Reaction of γ-nonanolactone with deuterobromic acid". Canadian Journal of Chemistry 73, № 4 (1995): 558–65. http://dx.doi.org/10.1139/v95-072.

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Series of isomeric monohaloalkanoic acids may be prepared from γ- or δ-alkanoic lactones by reaction with hydrogen halides. For example, γ-nonanolactone in 48% hydrogen bromide under reflux affords a 1:1.5:1.7:2.2:2.4 mixture of 4-, 5-, 6-, 7-, and 8-bromononanoic acids. In an examination of possible ways whereby such products are formed, it has been found that the use of 48% deuterium bromide leads to the introduction of up to 14 atoms of the isotope per bromoacid. According to 1H, 2H, and 13C nuclear magnetic resonance observations, however, the major components of the isomer mixture contain
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9

Bender, Christopher Owen, Dean Sutherland Clyne, and Douglas Dolman. "The photochemistry of 1-cyano-2,3-benzobicyclo[4.2.0]octa-2,4,7-triene." Canadian Journal of Chemistry 69, no. 1 (1991): 70–76. http://dx.doi.org/10.1139/v91-010.

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The title compound (10) was prepared, along with the 4-cyano isomer (11), by the direct irradiation of 5-cyanobenzocyclooctatetraene (9); the yields were 82% (Φ10 = 0.0030) and 12% (Φ11 = 0.0004) respectively. Triene 10 was thermally and photochemically reactive. Heating solutions of 10 at 150 °C for 1 h gave COT 9 quantitatively. On direct irradiation 10 forms 5-cyanobenzosemibullvalene (12; 5%, Φ = 0.019), COT 9 (70%, Φ = 0.56), and 1-cyanonaphthalene (14%, Φ = 0.078). Sensitized irradiation of 10 gave 9 exclusively (92%, Φ = 0.88). COT 9 was also produced by the direct irradiation of semibu
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10

Leigh, William J., and J. Alberto Postigo. "Cyclobutene photochemistry. Substituent effects on the photochemistry of 1-phenylcyclobutene." Canadian Journal of Chemistry 73, no. 2 (1995): 191–203. http://dx.doi.org/10.1139/v95-028.

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The photochemistry and photophysics of 1-phenylcyclobutene and five aryl-substituted derivatives have been studied in various solvents at room temperature. All six compounds fluoresce with quantum yields in the 0.2–0.3 range in cyclohexane and acetonitrile solution. 1-Phenylcyclobutene undergoes [2+2]-cycloreversion [Formula: see text] to yield phenylacetylene upon photolysis in either hydrocarbon or acetonitrile solution, and undergoes (Markovnikov) solvent addition upon irradiation in methanol solution [Formula: see text] in addition to cycloreversion. Triplet sensitization and quenching exp
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Book chapters on the topic "Deuterium. Rearrangements (Chemistry) Dideuteriobiscyclopropylidene"

1

Olah, George A., Arwed Burrichter, Golam Rasul, G. K. Surya Prakash, Mohammed Hachoumy, and Jean Sommer. "Protioacyl Dications: Hydrogen/Deuterium Exchange, Rearrangements, and Theoretical Studies." In World Scientific Series in 20th Century Chemistry. World Scientific Publishing Company, 2003. http://dx.doi.org/10.1142/9789812791405_0158.

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