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80985-31-5

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80985-31-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 80985-31-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,9,8 and 5 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 80985-31:
(7*8)+(6*0)+(5*9)+(4*8)+(3*5)+(2*3)+(1*1)=155
155 % 10 = 5
So 80985-31-5 is a valid CAS Registry Number.

80985-31-5Relevant articles and documents

REACTIVITY OF CARBANIONS. XI. REACTIONS OF ALKALINE SALTS OF FLUORENE AND 9-PHENYLFLUORENE WITH CYCLOHEXANONE

Beletskaya, I. P.,Solov'yanov, A. A.,Karpyuk, A. D.,Kucheryavenko, O. P.,Reutov, O. A.

, p. 1183 - 1187 (2007/10/02)

The reaction of alkali (Li, Na, K, and Cs) and tetrabutylammonium salts of fluorene and of lithium salt of 9-phenylfluorene with cyclohexanone was studied in dimethoxyethane, ether, benzene, and hexamethylphosphorotriamide.The reaction proceeds to give both addition and enolization.The reaction is an equilibrium process as shown by a study of the reverse reactions: decomposition of the alcoholate and the reactions of the alkaline enolates of cyclohexanone with fluorene.The position of the equilibrium is very sensitive to the nature of the cation and the solvent and the carbanion structure.The possible causes for this effect are considered.

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