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844683-66-5

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844683-66-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 844683-66-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,4,4,6,8 and 3 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 844683-66:
(8*8)+(7*4)+(6*4)+(5*6)+(4*8)+(3*3)+(2*6)+(1*6)=205
205 % 10 = 5
So 844683-66-5 is a valid CAS Registry Number.

844683-66-5Relevant articles and documents

Kinetics of the solvolyses of fluoro-substituted benzhydryl derivatives: Reference electrofuges for the development of a comprehensive nucleofugality scale

Nolte, Christoph,Mayr, Herbert

supporting information; experimental part, p. 1435 - 1439 (2010/05/18)

A series of m-fluoro-substituted benzhydryl chloridcjs, bromides, mesylates and Losylates 1-X to 5-X were prepared and subjected to solvolysis reactions in various solvents. The observed first-order rate constants ks(25 °C) were found to follow the correlation equation log ks(25 °C) = Sf(Nf + Ef), which allowed us to determine the electrofugalily parameters Ef for these destabilized benzhydrylium cations and the nucleofugality parameters Nf, S f for a series of leaving group/ solvent combinations.

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