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82517-80-4

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82517-80-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 82517-80-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,2,5,1 and 7 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 82517-80:
(7*8)+(6*2)+(5*5)+(4*1)+(3*7)+(2*8)+(1*0)=134
134 % 10 = 4
So 82517-80-4 is a valid CAS Registry Number.

82517-80-4Upstream product

82517-80-4Downstream Products

82517-80-4Relevant articles and documents

NON-KEKULE MOLECULES DERIVED CONCEPTUALLY BY HETEROATOM-FOR-CARBON SUBSTITUTION IN ALTERNANT HYDROCARBONS; M-QUINOMETHANE AND M-NAPHTHOQUINOMETHANE

Rule, Mark,Matlin, Albert R.,Seeger, David E.,Hilinski, Edwin F.,Dougherty, Dennis A.,Berson, Jerome A.

, p. 787 - 798 (2007/10/02)

Qualitative theoretical considerations suggest that substitution of a heteroatom for a C atom in an alternant hydrocarbon might result in a non-Kekule molecule with a triplet ground state, despite the non-degeneracy of the Hueckel NBMOs of the heteroatom derivative.The syntheses of 3-methylene-1-phenoxyl and 3-methylene-1-naphthoxyl are described.These compounds, biradical valence tautomers of m-quinomethanes, are characterized by EPR spectroscopy and are assigned triplet ground states.Optical resolution of 6-methylene-bicyclohex-3-ene-2-one, the precursor of 3-methylene-1-phenoxyl, is described.Repeated irradiation of the active ketone at 20K with intermittent warming to room temperature followed by re-isolation gives ketone of undiminished activity, which suggests that re-cyclization of (presumably achiral) 3-methylene-1-phenoxyl does not occur under these conditions.

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