190-95-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 190-95-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,9 and 0 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 190-95:
(5*1)+(4*9)+(3*0)+(2*9)+(1*5)=64
64 % 10 = 4
So 190-95-4 is a valid CAS Registry Number.
InChI:InChI=1/C26H14/c1-2-7-18-17(6-1)19-9-4-10-21-20-8-3-5-15-11-12-16-13-14-22(18)26(25(19)21)24(16)23(15)20/h1-14H
190-95-4Relevant articles and documents
Thermal cyclodehydrogenations to form 6-membered rings: Cyclizations of [5]helicenes
Xiang, Xue,Scott, Lawrence T.
, p. 3937 - 3940 (2008/02/11)
Flash vacuum pyrolysis (FVP) of [5]helicene induces a thermal cyclodehydrogenation to form benzo[ghi]perylene. Evidence is presented that supports an electrocyclization-rearomatization mechanism and is inconsistent with mechanistic alternatives involving the intermediacy of aryl radicals or carbenes in the helicene fjord region.