Cas 1638112-61-4,C<sub>23</sub>H<sub>16</sub>

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Check Digit Verification of cas no

The CAS Registry Mumber 1638112-61-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,8,1,1 and 2 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1638112-61:
(9*1)+(8*6)+(7*3)+(6*8)+(5*1)+(4*1)+(3*2)+(2*6)+(1*1)=154
154 % 10 = 4
So 1638112-61-4 is a valid CAS Registry Number.

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1638112-61-4Relevant articles and documents

The B(C6F5)3 boron Lewis acid route to arene-annulated pentalenes

Chen, Chao,Harhausen, Marcel,Fukazawa, Aiko,Yamaguchi, Shigehiro,Froehlich, Roland,Daniliuc, Constantin G.,Petersen, Jeffrey L.,Kehr, Gerald,Erker, Gerhard

, p. 1671 - 1681 (2014)

4,5-Dimethyl-1,2-bis(1-naphthylethynyl)benzene (12) undergoes a rapid multiple ring-closure reaction upon treatment with the strong boron Lewis acid B(C6F5)3 to yield the multiply annulated, planar conjugated π-system 13 (

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1638112-61-4