Cas 640270-79-7,C6F4(B(C6F5)2)2Cl(1-)

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Check Digit Verification of cas no

The CAS Registry Mumber 640270-79-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,0,2,7 and 0 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 640270-79:
(8*6)+(7*4)+(6*0)+(5*2)+(4*7)+(3*0)+(2*7)+(1*9)=137
137 % 10 = 7
So 640270-79-7 is a valid CAS Registry Number.

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640270-79-7Relevant academic research and scientific papers

Formation of chelated counteranions using lewis acidic diboranes: Relevance to isobutene polymerization

Chai, Jianfang,Lewis, Stewart P.,Collins, Scott,Sciarone, Timo J.J.,Henderson, Lee D.,Chase, Preston A.,Irvine, Geoffrey J.,Piers, Warren E.,Elsegood, Mark R.J.,Clegg, William

, p. 5667 - 5679 (2008/10/09)

The reactions of chelating diboranes with PhCMe2Cl and related initiators were studied by variabletemperature NMR spectroscopy. Although thermally stable ion-pairs featuring weakly coodinating anions (WCA) are formed, isobutene polymerization is complicated by the tendency of these WCA to act as hindered bases toward Bronsted acidic chain ends.

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