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74157-83-8

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74157-83-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74157-83-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,1,5 and 7 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 74157-83:
(7*7)+(6*4)+(5*1)+(4*5)+(3*7)+(2*8)+(1*3)=138
138 % 10 = 8
So 74157-83-8 is a valid CAS Registry Number.

74157-83-8Relevant articles and documents

Formation of hemiaminals by N-protonation of ketenimines (etheneimines) sterically hindered at carbon

Hegarty, Anthony F.,Kelly, John G.,Relihan, Colette M.

, p. 1175 - 1181 (2007/10/03)

The bis(pentamethylphenyl)-N-isopropyl-ketenimine [N-isopropyl-2,2-bis(pentamethylphenyl)-ethenimine] 11 undergoes pre-equilibrium N-protonation followed by water attack in 1:1 acetonitrile-water at 25°C. This is confirmed by the inverse solvent isotope e

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