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888039-39-2

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888039-39-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 888039-39-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,8,8,0,3 and 9 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 888039-39:
(8*8)+(7*8)+(6*8)+(5*0)+(4*3)+(3*9)+(2*3)+(1*9)=222
222 % 10 = 2
So 888039-39-2 is a valid CAS Registry Number.

888039-39-2Relevant articles and documents

Single-isomer iodochlorination of alkynes and chlorination of alkenes using tetrabutylammonium iodide and dichloroethane

Ho, Michael L.,Flynn, Alison B.,Ogilvie, William W.

, p. 977 - 983 (2007/10/03)

(Chemical Equation Presented) The efficient formation of single-isomer, differentially halogenated alkenes and alkanes is described. These structures were generated by treatment of the appropriate alkyne or alkene with tetrabutylammonium iodide in refluxing dichloroethane. This process is highly selective as evidenced by control experiments using ICl. Treatment of the same alkenes and alkynes directly with iodine monochloride resulted in complex, inseparable mixtures of regio- and stereoisomers. Mechanistic studies indicated that the Bu4NI reaction most likely proceeded through the slow generation of ICl. Complexation of ICl with Bu4NI is also a key controlling element that leads to perfect regio-, chemo-, and stereoselectivity in these processes.

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