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43043-80-7

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43043-80-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 43043-80-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,3,0,4 and 3 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 43043-80:
(7*4)+(6*3)+(5*0)+(4*4)+(3*3)+(2*8)+(1*0)=87
87 % 10 = 7
So 43043-80-7 is a valid CAS Registry Number.

43043-80-7Downstream Products

43043-80-7Relevant articles and documents

Heats of Hydrogenation, IV. - Homoaromaticity in Norcaradiene and Cycloheptatriene

Roth, Wolfgang R.,Klaerner, Frank-Gerrit,Siepert, Gerd,Lennartz, Hans-Werner

, p. 217 - 224 (2007/10/02)

By comparison of the heats of hydrogenation of fixed norcaradienes with analogous cyclobutane derivatives and from the difference of experimental heats of formation with values calculated by force-field methods the homoaromatic stabilization of norcaradienes and cycloheptatrienes are calculated and compared with the equilibrium position of the respective valence isomers.Key Words: Homoaromaticity / Resonance energy / Calculations, force-field / Heats of hydrogenation

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