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56638-60-9

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56638-60-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 56638-60-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,6,3 and 8 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 56638-60:
(7*5)+(6*6)+(5*6)+(4*3)+(3*8)+(2*6)+(1*0)=149
149 % 10 = 9
So 56638-60-9 is a valid CAS Registry Number.

56638-60-9Relevant articles and documents

MECHANISM OF AMINOMETHANESULFONATE FORMATION AND HYDROLYSIS REACTIONS

Groote, R. A. M. C. De,Neumann, M. G.,Frollini, E.

, p. 295 - 302 (2007/10/02)

Based on kinetic, structural and synthetic evidence, a mechanism is proposed fro the synthesis of aminomethanesulfonates (R*NH*CHR'*SO3(1-)).The mechanism involves the initial protonation of the amine, proton transfer to the hydroxymethanesulfonate via a six-membered cyclic intermediate followed by a nucleophilic attack of the free amine on the carbon atom.The transition state is assumed to correspond to a structure with practically all the positive charge on the nitrogen atom.For the hydrolysis reaction, the initial protonation of the aminomethanesulfonate is followed by the nucleophilic attack of a water molecule.This mechanism is in agreement with the experimentally determined Hammett reaction constants ρ, i.e. -3.5 for the formation reaction and -2.3 for the hydrolysis.

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