- Temperature dependence of pentyl nitrate formation from the reaction of pentyl peroxy radicals with NO
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Alkyl nitrate yields from the reaction of 1-pentyl, 2-pentyl and 2-methyl-2-butyl peroxy radicals with NO have been determined over the temperature range (261-305 K) and at 1 bar pressure from the photo-oxidation of the iodoalkane precursors in air-NO mixtures. Yields were observed to increase with decreasing temperature and, contrary to previous observations, along the series primary secondary ? tertiary. Our results suggests a significant temperature dependence for the formation of nitrates from the reaction of pentyl peroxy radicals with NO and represent an extension in the temperature range over which this reaction has been studied experimentally in the past. the Owner Societies.
- Cassanelli, Paola,Fox, David J.,Cox, R. Anthony
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- Reductive Ni-catalysis for stereoselective carboarylation of terminal aryl alkynes
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Stereoselective dicarbofunctionalization of terminal aryl alkynes has been achieved through reductive Ni-catalysis. The exclusive regioselective andanti-addition selective alkylarylation of terminal alkynes is accomplished using alkyl iodide and aryl iodide as electrophilic coupling partners in the presence of NiBr2as the catalyst and Mn as an inexpensive reductant.
- Maiti, Saikat,Rhlee, Joon Ho
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supporting information
p. 11346 - 11349
(2021/11/09)
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- Determination and interpretation of second order rate constants for the addition of hydrogen halides to alkenes
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An extensive range of second order rate constants for the addition of hydrogen halides to alkenes in 98% v/v ethanoic acid (acetic acid)-water have been obtained by conductivity measurements. The rate constants are in the expected order of HF HCl HBr HI. The rates with different alkenes cannot be rationalised solely by a consideration of carbocation stability and it has been necessary to consider steric effects in order to explain the observed order.
- Borgeaud, Robert,Newman, Henry,Schelpe, Arabella,Vasco, Veronica,Peter Hughes
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p. 810 - 813
(2007/10/03)
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- Convenient, in situ generation of anhydrous hydrogen iodide for the preparation of α-glycosyl iodides and vicinal lodohydrins and for the catalysis of Ferrier glycosylation
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(matrix presented) Anhydrous hydrogen iodide is generated in situ by the reaction of solid iodine and a thiol. The HI thus generated has been employed for the efficient preparation of α-glycosyl iodides and vicinal iodohydrins from the corresponding glycosyl acetates and epoxides, respectively, and for Ferrier glycosylation of alcohols and thiols.
- Chervin, Stephanie M.,Abada, Paolo,Koreeda, Masato
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p. 369 - 372
(2007/10/03)
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- Direct Conversion of Alcohols into the Corresponding Iodides
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A mild and effective procedure for directly converting secondary, tertiary and benzylic alcohols into the corresponding iodides is described using I2 in refluxing petroleum ether.The reaction proceeds with inversion of configuration.
- Joseph, Reni,Pallan, S. Pradeep,Sudalai, A.,Ravindranathan, T.
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p. 609 - 612
(2007/10/02)
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- Finkelstein Reaction with Aqueous Hydrogen Halides Efficiently Catalysed by Lipophilic Quarternary Onium Salts
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The rate of halogen metathesis between halogenoalkanes RX 1-4 (X = F, Cl, Br, I) and aqueous concentrated hydrogen halides HY (Y = Cl, Br, I) is strongly accelerated under phase-transfer catalysis conditions, without solvent.The amount and nature of the nucleophilic species in the organic phase were determined.
- Landini, Dario,Albanese, Domenico,Mottadelli, Sabrina,Penso, Michele
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p. 2309 - 2312
(2007/10/02)
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- EINE EINFACHE METHODE ZUR DARSTELLUNG TERTIAERER IODIDE
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Hindered alkyl iodides may be prepared conveniently by treatment of the corresponding alcohols with magnesium iodide in n-pentane.
- Martinez, A. Garcia,Alvarez, R. Martinez,Vilar, E. Teso,Fraile, A. Garcia,Barcina, J. Osio,et al
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p. 6441 - 6442
(2007/10/02)
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- Arbuzov Reaction of Alkyl and Silyl Phosphites with Halogens involving Four- and Five-co-ordinate Intermediates
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Low temperature 31P n.m.r. spectroscopy and chemical data have been applied to elucidate the mechanism of the Arbuzov-type reaction between phosphites and halogens.Simple and substituted trialkyl, alkyl 1,2-phenylene, and trisilyl phosphites have been allowed to react with chlorine, bromine, and iodine.In some cases intermediate halogenophosphonium salt (2) and in others halogenophosphoranes (3) are observed which then decompose into the corresponding pure highly reactive phosphorohalidates (4).It was possible to prepare stable phosphonium salts from halogenophosphonium salts (2) and halogenophosphoranes (3).
- Michalski, Jan,Pakulski, Marek,Skowronska, Aleksandra
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p. 833 - 836
(2007/10/02)
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- A Convenient Method for the Preparation of Highly Pure t-Alkyl Bromides and Iodides
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Highly pure (99-100 percent) t-butyl and t-pentyl bromides and iodides, and 3-bromo-3-ethylpentane were readily prepared in 83-95 percent yields by the reactions of the corresponding alcohols with hydrobromic or hydroiodic acid, using lithium or calcium halide.The metal halides remarkably increased the yield and the purity of the products.
- Masada, Hiromitsu,Murotani, Yoshiharu
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p. 1181 - 1182
(2007/10/02)
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