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57020-29-8

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57020-29-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57020-29-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,0,2 and 0 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 57020-29:
(7*5)+(6*7)+(5*0)+(4*2)+(3*0)+(2*2)+(1*9)=98
98 % 10 = 8
So 57020-29-8 is a valid CAS Registry Number.

57020-29-8Relevant articles and documents

AROMATIC FLUORINE DERIVATIVES. XCIX. REACTION OF OCTEFLUORONAPTHALENE WITH PENTAFLUOROBENZENESULFONYL HALIDES AND DI-tert-BUTYL PEROXIDE

Bogachev, A. A.,Kobrina, L. S.,Yakobson, G. G.

, p. 967 - 975 (2007/10/02)

In the reaction of octafluoronapthalene with oxygen-containing radicals (pentaflurophenylsulfonyl and tert-butoxyl) the stabilization of the radical ? complexes is realized by the formation of the heptafluoronapthoxyl radical, the subsequent transformations of which lead to polyfluorinated derivatives of oxodihydronapthalenes.The products from homolytic substitution and the products from dimerization of the respective radical ? complexes are formed in the reaction of octafluoronapthalene with methyl and pentafluorophenyl radicals.Analysis of the 19F NMR spectra of the obtained dimeric product makes it possible to suppose that a rearrangement with 1,2-migration of a fluorine atom occurs in the ? complexes from the addition of the methyl and pentafluorophenyl radicals to octafluoronapthalene.

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