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50515-43-0

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50515-43-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 50515-43-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,0,5,1 and 5 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 50515-43:
(7*5)+(6*0)+(5*5)+(4*1)+(3*5)+(2*4)+(1*3)=90
90 % 10 = 0
So 50515-43-0 is a valid CAS Registry Number.

50515-43-0Relevant articles and documents

The Allopolarization Principle and its Applications, VI. The Alkylation of Enolate Anions: Polarity and Regioselectivity

Gompper, Rudolf,Vogt, Hans-Hubert,Wagner, Hans-Ulrich

, p. 1644 - 1652 (2007/10/02)

The O/C methylation ratio in the reaction of sodium enolates with dimethylsulfate depends on the polar (electronic) effect of substituents.The relative ?-charge density Px/y = lx/ly can be used as a measure for the polarity of ambifunctional anions; in case of enolate anions PO/C = lO/lC.The change of the regioselectivity Sf = log QO/QC in the alkylation of enolates is a function of a change in the polarity PO/C; ΔSf=f(ΔPx/y).The polar effect of substituents influences the charge control during the alkylation process via a change of the polarity of the enolate system: The higher the polarity of the anion, the stronger the charge control and the higher the yield of enol ether (O-alkylation). - Keywords: Alkylation, Enolate Anions

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