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791821-94-8

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791821-94-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 791821-94-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,9,1,8,2 and 1 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 791821-94:
(8*7)+(7*9)+(6*1)+(5*8)+(4*2)+(3*1)+(2*9)+(1*4)=198
198 % 10 = 8
So 791821-94-8 is a valid CAS Registry Number.

791821-94-8Relevant articles and documents

Intramolecular 9-membered hydrogen bonding of 2-arylmethylphenols having carbonyl groups at 2′-position

Yoshimi, Yasuharu,Maeda, Hajime,Hatanaka, Minoru,Mizuno, Kazuhiko

, p. 9425 - 9431 (2007/10/03)

Thermodynamic parameters of nine-membered intramolecular hydrogen bonding between carbonyl groups and phenolic hydroxyl groups of 2-arylmethylphenols having methoxycarbonyl, dimethylcarbamoyl, and formyl groups were determined by variable temperature 1H NMR studies and van't Hoff analysis. The enthalpy of the hydrogen bonding was related to the electron-withdrawing ability of the substituents on the phenol and the basicity of the carbonyl group. The entropy loss of the hydrogen bonding was dependent on the rotation freedom of the phenol group. The enthalpy of nine-membered intramolecular hydrogen bonding between carbonyl groups and phenolic hydroxyl groups of 2-arylmethylphenols was related to the electron-withdrawing ability of the substituents on the phenol and the basicity of the carbonyl group. The entropy loss was dependent on the rotation freedom of the phenol group.

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