Detail of "1940-57-4"

Reference

An inexpensive oxidation of benzyl halides with sodium hypochlorite

An inexpensive oxidation of benzyl halides with sodium hypochlorite. Cacchi, Sandro; La Torre, F. (Ist. Chim. Org., Rome 00161, Italy). Chem. Ind. (London), (8), 286-7 (English) 1986. CODEN: CHINAG. ISSN: 0009-3068. DOCUMENT TYPE: Journal CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) The oxidn. of RR1C6H3CH2R2 (I, R = H, R1 = 4-O2N, 2-O2N, Br; R = 2-MeO, R1 = 5-O2N; R2 = Cl, Br) in MeCN by aq. NaClO in the presence of Bu4N+ HSO4- gave RR1C6H3CO2H, whereas I (R = H, R1 = 4-Cl, 3-MeO; R = 2-Me, R1 = 5-Me; R2 = Cl) gave the corresponding acids, aldehydes, and alcs. Similar treatment of benzhydryl halides and 9-bromofluorene gave the resp.In this experiment, several chemicals are used like 1940-57-4 and 104-88-1 ketones. .

Photodissociation of molecular beams of aryl halides: Translational energy distribution of the fragments

Photodissociation of molecular beams of aryl halides: Translational energy distribution of the fragments. Kawasaki, M.; Lee, S. J.; Bersohn, R. (Dep. Chem., Columbia Univ., New York, N. Y., USA). J. Chem. Phys., 66(6), 2647-55 (English) 1977. CODEN: JCPSA6. DOCUMENT TYPE: Journal CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic Processes) Mol. beams of the aryl halides, 1,5-diiodonaphthlene, 4,4'-diiododiphenyl, 4,4'-dibromobiphenyl, and 9-bromofluorene were dissocd. by pulsed laser light at 265, 280, 300, and 321 nm. The measured time-of-flight distribution of the fragments was converted to a translational energy distribution. This distribution is independent of the wavelength of the light absorbed. The av. translational energy of the fragments of the above 4 mols. is 16.3, 17.4, 11, and 12 kcal/mol, resp. The I atoms are produced mainly in their ground electronic state. These results are consistent with a model in which the light energy is absorbed by the arom. system, and the electronic but not the vibrational energy is subsequently transferred to the C-halogen bond. Knowing the bond energy one can transform the translational energy distribution into an internal energy distribution of the fragments, which has a Poissonian form. In a typical dissocn. 5-10 vibrational quanta are excited in the arom. rings by the repulsive force of the departing halogen atom. The measured angular distributions of the fragments of 1,4-diiodobenzene, 4,4'-diiodobiphenyl, and 1,5-diiodonaphthalene were fitted with anisotropy parameters .beta.There are some commonly used reagents with their cas registry numbers 1940-57-4 and 62607-36-7 in this article. from which lifetimes were extracted. Uncertainties in the .beta. values are such that all that is definitely known is that dissocn. lifetimes of these and similar iodocompds. are .ltoreq.2 ps. .