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25242-85-7

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25242-85-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 25242-85-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,2,4 and 2 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 25242-85:
(7*2)+(6*5)+(5*2)+(4*4)+(3*2)+(2*8)+(1*5)=97
97 % 10 = 7
So 25242-85-7 is a valid CAS Registry Number.

25242-85-7Downstream Products

25242-85-7Relevant articles and documents

Facial Selectivity in the Diels-Alder Reactions of 5-Chloro-, 5-Bromo-, and 5-Iodo-l,3-cyclopentadiene and Derivatives

Wellman, Mark A.,Burry, Lori C.,Letourneau, Johnathon E.,Bridson, John N.,Miller, David O.,Jean Burnell

, p. 939 - 946 (2007/10/03)

A variety of dienophiles was used to assess the facial selectivity of Diels-Alder reactions in a series of 1,3-cyclopentadiene derivatives (1-3, 6-10) in which chlorine, bromine, and iodine were planenonsymmetric atoms pitted against hydrogen or methyl at C-5. The results were rationalized in terms of the major factor controlling the facial selectivity being related to steric hindrance between the diene and the dienophile. Selectivity did not correlate with reactivity. Facial selectivity in the reactions with 4-phenyl-l,2,4-triazoline-3,5-dione as the dienophile was also influenced by a second significant factor, postulated to be filled-orbital repulsion with the halogen substituent.

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