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20174-07-6

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20174-07-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20174-07-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,1,7 and 4 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 20174-07:
(7*2)+(6*0)+(5*1)+(4*7)+(3*4)+(2*0)+(1*7)=66
66 % 10 = 6
So 20174-07-6 is a valid CAS Registry Number.

20174-07-6Downstream Products

20174-07-6Relevant articles and documents

Mechanisms for Reactions of Halogenated Compounds. Part 3. Variation in Activating Influence of Halogen Substituents in Nucleophilic Aromatic Substitution

Chambers, Richard D.,Close, Deborah

, p. 778 - 780 (2007/10/02)

Rate constants are reported for reactions of polyhalogeno-pyridines and -benzenes with sodium methoxide in methanol.Relative activating effects of individual fluorine and chlorine atoms at positions ortho, meta, and para to the reaction site are determined and compared with orders determined from reactions involving ammonia in aqueous dioxan.The results are remarkably similar.Additional support is provided for earlier explanations of the activating effects of ortho-fluorine and -chlorine.Activation parameters, determined for reactions of polyhalogenepyridines with ammonia in aqueous dioxan, clearly demonstrate that differences in reactivity along the series arise mainly from changes in activation energy.

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