Cas 73856-59-4,3,7-Di-tert-butyl-1,2,5,6-tetraphenyl-4-selena-cyclobuta[f]indene

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Check Digit Verification of cas no

The CAS Registry Mumber 73856-59-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,8,5 and 6 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 73856-59:
(7*7)+(6*3)+(5*8)+(4*5)+(3*6)+(2*5)+(1*9)=164
164 % 10 = 4
So 73856-59-4 is a valid CAS Registry Number.

73856-59-4Upstream product

56922-70-4 2,7-di-tert-butyl-4,5,9,10-tetraphenylbenzo<1,2:4,5>dicyclobutadiene

73856-59-4Downstream Products

81710-23-8 2-Cyano-4-[2,5-di-tert-butyl-4-dicyanomethylene-7,8-diphenyl-bicyclo[4.2.0]octa-1,5,7-trien-(3Z)-ylidene]-3,4-diphenyl-but-2-enenitrile

73856-59-4Relevant academic research and scientific papers

ISOLATION OF O-XYLYLENE (o-QUINODIMETHANE) DERIVATIVES. A STRONG THROUGH-BOND INTERACTION IN 2,3-BENZOBICYCLOHEXANE SYSTEM.

Toda, Fumio,Tanak, Koichi,Matsui, Masashi

, p. 217 - 220 (2007/10/02)

Some o-xylylene (o-quinodimethane) derivatives were isolated as stable crystalline materials.A strong through-bond interaction in tetracyanoethylene addition product of tetraphenylbenzodicyclobutadiene (2l) is suggested.

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