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75017-20-8

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75017-20-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 75017-20-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,0,1 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 75017-20:
(7*7)+(6*5)+(5*0)+(4*1)+(3*7)+(2*2)+(1*0)=108
108 % 10 = 8
So 75017-20-8 is a valid CAS Registry Number.

75017-20-8Downstream Products

75017-20-8Relevant articles and documents

gem-Dimethyl Effect in a Grignard Reagent Cyclization-Cleavage Rearrengament

Hill, Alexander E.,Link, Daniel C.,Donndelinger Peter

, p. 1177 - 1182 (2007/10/02)

(2,2-Dimethyl-4-penten-1-yl)magnesium bromide (1) is in equilibrium with its cyclic isomer, magnesium bromide (2).The equilibrium constant for this cyclization has a value of 2E-3.The gem-dimethyl substitution leads to an increase of a factor of about 22 in the equilibrium constant and also retards the rate of cleavage of 2.The sources of the gem-dimethyl effect in this system are discussed.

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