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Journal articles on the topic 'Inversió de Walden'

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

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1

Alkorta, Ibon, and José Elguero. "The SN2 reaction and its relationship with the Walden inversion, the Finkelstein and Menshutkin reactions together with theoretical calculations for the Finkelstein reaction." Structural Chemistry 32, no. 5 (2021): 1755–61. http://dx.doi.org/10.1007/s11224-021-01805-y.

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AbstractThis communication gives an overview of the relationships between four reactions that although related were not always perceived as such: SN2, Walden, Finkelstein, and Menshutkin. Binary interactions (SN2 & Walden, SN2 & Menshutkin, SN2 & Finkelstein, Walden & Menshutkin, Walden & Finkelstein, Menshutkin & Finkelstein) were reported. Carbon, silicon, nitrogen, and phosphorus as central atoms and fluorides, chlorides, bromides, and iodides as lateral atoms were considered. Theoretical calculations provide Gibbs free energies that were analyzed with linear models
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2

Maraver, J. J., E. S. Marcos, and J. Bertran. "Water molecule migration in walden inversion reaction." Journal of Molecular Structure: THEOCHEM 120 (February 1985): 321–26. http://dx.doi.org/10.1016/0166-1280(85)85123-x.

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3

van Bochove, Marc A., Marcel Swart, and F. Matthias Bickelhaupt. "Stepwise walden inversion in nucleophilic substitution at phosphorus." Phys. Chem. Chem. Phys. 11, no. 2 (2009): 259–67. http://dx.doi.org/10.1039/b813152j.

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4

Schechter, Israel. "Modeling the isotope effect in Walden inversion reactions." Chemical Physics Letters 180, no. 3 (1991): 260–64. http://dx.doi.org/10.1016/0009-2614(91)87150-a.

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5

Krotos, László, and Gábor Czakó. "Does the Cl + CH4 → H + CH3Cl Reaction Proceed via Walden Inversion?" Journal of Physical Chemistry A 121, no. 49 (2017): 9415–20. http://dx.doi.org/10.1021/acs.jpca.7b10226.

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6

Clary, David C., and Juliana Palma. "Quantum dynamics of the Walden inversion reaction Cl−+CH3Cl→ClCH3+Cl−." Journal of Chemical Physics 106, no. 2 (1997): 575–83. http://dx.doi.org/10.1063/1.473397.

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7

Alhambra, Cristobal, Li Wu, Zhong-Yin Zhang, and Jiali Gao. "Walden-Inversion-Enforced Transition-State Stabilization in a Protein Tyrosine Phosphatase." Journal of the American Chemical Society 120, no. 16 (1998): 3858–66. http://dx.doi.org/10.1021/ja972578n.

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8

Borkar, Nitin, A. Akbar Latifi, and Edward P. Rack. "High energy chlorine‐for‐chlorine substitution involving Walden inversion in liquid enantiomers." Journal of Chemical Physics 85, no. 5 (1986): 3125–26. http://dx.doi.org/10.1063/1.451022.

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9

Be?li, Serap, Simon J. Coles, David B. Davies, et al. "Crystallographic Proof of Double Walden Inversion in Nucleophilic Substitution Reactions of Macrocyclic Cyclotriphosphazene Derivatives." European Journal of Inorganic Chemistry 2005, no. 5 (2005): 959–66. http://dx.doi.org/10.1002/ejic.200400745.

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10

Andrés, J. L., A. Lledós, M. Duran, and J. Bertrán. "Electric fields acting as catalysts in chemical reactions. An ab initio study of the walden inversion reaction." Chemical Physics Letters 153, no. 1 (1988): 82–86. http://dx.doi.org/10.1016/0009-2614(88)80136-2.

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11

Cognola, Federica. "On the left periphery of three languages of Northern Italy." Linguistic Variation 19, no. 1 (2019): 82–117. http://dx.doi.org/10.1075/lv.16005.cog.

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Abstract Through a focus on the properties of subject-finite verb inversion and XP fronting in three relaxed V2 languages, namely Cimbrian, Ladin and Mòcheno, this paper aims to widen and refine our understanding of relaxed V2 languages, i.e. languages in which the V2 property should be understood in a technical sense as obligatory V-to-C movement, not as a simple description referring to linearisation (Benincà 2006, 2013; Ledgeway 2016). It will be shown that inversion differs across relaxed V2 languages in two ways. In a first subtype, inversion is not associated with any marked pragmatic in
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12

Boeck, Gisela. "Paul Walden (1863–1957): the man behind the Walden inversion, the Walden rule, the Ostwald-Walden-Bredig rule and Ionic liquids." ChemTexts 5, no. 1 (2019). http://dx.doi.org/10.1007/s40828-019-0080-9.

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13

Zhao, Zhiqiang, Zhaojun Zhang, Shu Liu, and Dong H. Zhang. "Dynamical barrier and isotope effects in the simplest substitution reaction via Walden inversion mechanism." Nature Communications 8, no. 1 (2017). http://dx.doi.org/10.1038/ncomms14506.

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14

Timm, Matthew J., Lydie Leung, Kelvin Anggara, and John C. Polanyi. "Direct observation of knock-on reaction with umbrella inversion arising from zero-impact-parameter collision at a surface." Communications Chemistry 4, no. 1 (2021). http://dx.doi.org/10.1038/s42004-021-00453-x.

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AbstractIn Surface-Aligned-Reactions (SAR), the degrees of freedom of chemical reactions are restricted and therefore the reaction outcome is selected. Using the inherent corrugation of a Cu(110) substrate the adsorbate molecules can be positioned and aligned and the impact parameter, the collision miss-distance, can be chosen. Here, substitution reaction for a zero impact parameter collision gives an outcome which resembles the classic Newton’s cradle in which an incident mass ‘knocks-on’ the same mass in the collision partner, here F + CF3 → (CF3)′ + (F)′ at a copper surface. The mechanism o
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15

Shen, Jinxue, Dongdong Dong, Zefa Wang, Junfen Wan, and Xuejun Cao. "Synthesis of ursodeoxycholic acid by electrochemical stereoselective reduction of 7-ketolithocholic acid in aprotic solvents." Scientific Reports 11, no. 1 (2021). http://dx.doi.org/10.1038/s41598-021-95577-4.

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AbstractA novel method of producing ursodeoxycholic acid was developed through electrochemical stereoselective reduction of 7-ketolithocholic acid (7K-LCA) in a undivided electrolytic cell and aprotic solvents as electrolyte. Five aprotic solvents were investigated as electrolytes, the simple structure of dimethyl sulfoxide (DMSO) and N,N-dimethylformamide (DMF) were easily attacked by chloride ions and undergo nucleophilic reactions, resulting in no target reactions. The structure of hexamethylphosphoric triamide (HMPA) and 1,3-methyl-3,4,5,6-tetrahydro-2 (1H) -pyrimidinone (DMPU) is relative
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