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22984-59-4

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22984-59-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 22984-59-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,9,8 and 4 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 22984-59:
(7*2)+(6*2)+(5*9)+(4*8)+(3*4)+(2*5)+(1*9)=134
134 % 10 = 4
So 22984-59-4 is a valid CAS Registry Number.

22984-59-4Relevant articles and documents

An analysis of the factors contributing to the regioselectivity observed in the opening of oxiranes

Kayser, Margaret M.,Morand, Peter

, p. 302 - 306 (2007/10/02)

The regioselectivity of epoxide ring opening can be analyzed in terms of hard-soft acid base (HSAB) theory.The coordination of the hard acid with the oxigen atom of the oxirane ring produces a "pulling effect" which determines the direction of the ring opening.In the absence of strong "pulling effect" the "pushing effect" of the approaching base is examined and the consequences of relative softness or hardness of the nucleophile on the regioselectivity of the ring opening are discussed.

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