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62291-52-5

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62291-52-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 62291-52-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,2,2,9 and 1 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 62291-52:
(7*6)+(6*2)+(5*2)+(4*9)+(3*1)+(2*5)+(1*2)=115
115 % 10 = 5
So 62291-52-5 is a valid CAS Registry Number.

62291-52-5Relevant articles and documents

Polycyclen vom Triangulen-Typ, II. Dreifach ortho-verbrueckte Triphenylmethan-Derivate

Hellwinkel, Dieter,Aulmich, Gerhard,Melan, Michael

, p. 86 - 108 (2007/10/02)

The syntheses of the new polycyclic systems 12,12c-dihydro-4,4,8,8,12,12-hexamethyl-4H,8H-dibenzopyrene (8), 11,11c-dihydro-7,7,11,11-tetramethyl-7H-naphthaceanthrylene (43), and 9,13b-dihydro-5,5,9,9-tetramethyl-1,13-ethano-5H-naphthanthracene (44) are reported.The spectroscopic data are in accordance with a pyramidal C3v-structure for 8, a similar Cs-structure for 43, and a flexible, helical C1-structure for 44.Furthermore, 8 can be transformed into its rapidly inverting pyramidal anion 11 and into its cation 9 which most probably is planar.

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