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117995-11-6

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117995-11-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 117995-11-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,9,9 and 5 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 117995-11:
(8*1)+(7*1)+(6*7)+(5*9)+(4*9)+(3*5)+(2*1)+(1*1)=156
156 % 10 = 6
So 117995-11-6 is a valid CAS Registry Number.

117995-11-6Downstream Products

117995-11-6Relevant articles and documents

PROTON TRANSFER REACTIONS BETWEEN ORTHO-METHYL SUBSTITUTED DERIVATIVES OF 4-NITROPHENYLPHENYLCYANOMETHANE AND NITROGEN BASES IN ACETONITRILE SOLVENT

Leffek, Kenneth T.,Pruszynski, Przemyslaw

, p. 1454 - 1458 (2007/10/02)

Equilibrium constants, rate constants, primary deuterium isotope effects, and activation parameters have been measured for the proton transfer reactions in acetonitrile solvent of 4-nitrophenylphenylcyanomethane and 2-methyl-4-nitrophenylphenylcyanomethane with tetramethylguanidine base and for the reactions of 2-methyl-4-nitrophenylphenylcyanomethane and 2,6-dimethyl-4-nitrophenylphenylcaynomethane with 1,5-diazabicycloundec-7-ene base.Introduction of the ortho-methyl groups in the substrate molecule caused significant reductions in the equilibrium and the rate constants.The expected rise in the kinetic primary deuterium isotope effect was not observed when the first ortho-methyl group was introduced, but a 20percent increase did accompany the introduction of the second ortho-methyl group.Enthalpy of activation measurements indicated that there was no increase in the proton tunnelling contribution to the isotope effect when the amount of steric hindrance is increased with ortho-methyl groups.

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