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77817-28-8

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77817-28-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77817-28-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,8,1 and 7 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 77817-28:
(7*7)+(6*7)+(5*8)+(4*1)+(3*7)+(2*2)+(1*8)=168
168 % 10 = 8
So 77817-28-8 is a valid CAS Registry Number.

77817-28-8Relevant articles and documents

RING-CHAIN TAUTOMERISM IN SUBSTITUTED HYDRAZONES. XV. N-BENZYL-N-(2-HYDROXYALKYL)HYDRAZONES OF AROMATIC CARBONYL COMPOUNDS

Potekhin, A. A.,Safronov, A. O.

, p. 322 - 328 (2007/10/02)

By spectral methods it was shown that the N-benzyl-N-(2-hydroxyethyl)- and N-benzyl-N-(2-hydroxypropyl)hydrazones of substituted benzaldehydes in the crystalline state and in solutions in tetrachloroethylene exist exclusively in the acyclic form.In solutions the analogous derivatives of acetophenones form tautomeric mixtures of the corresponding hydrazones and perhydro-1,3,4-oxadiazines.The equilibrium concentration of the cyclic form increases with increase in the electron-withdrawing character of the substituent in the molecule of the initial acetophenone.The ΔH0 and ΔS0 values for some tautomeric systems were obtained on the basis of the temperature dependance of the equilibrium constants.

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