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143770-85-8

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143770-85-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143770-85-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,7,7 and 0 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 143770-85:
(8*1)+(7*4)+(6*3)+(5*7)+(4*7)+(3*0)+(2*8)+(1*5)=138
138 % 10 = 8
So 143770-85-8 is a valid CAS Registry Number.

143770-85-8Relevant articles and documents

Atropisomerism in Doubly peri-Substituted 9-(2-methylbenzyl)triptycene Derivatives, 8-Chloro- and 8-Bromo-1,4-dimethyl-9-(2-methylbenzyl)triptycenes

Yamamoto, Gaku,Nemoto, Takashi,Ohashi, Yuji

, p. 1957 - 1966 (2007/10/02)

The 13C dynamic NMR study revealed that 9-(2-methylbenzyl)triptycene has an energy barrier to gear rotation of 11.8 kcal*mol-1 (1 cal=4.184 J).Introduction of substituents at two of the peri-positions was expected to raise the barrier enough fo

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