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87840-01-5

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87840-01-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87840-01-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,8,4 and 0 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 87840-01:
(7*8)+(6*7)+(5*8)+(4*4)+(3*0)+(2*0)+(1*1)=155
155 % 10 = 5
So 87840-01-5 is a valid CAS Registry Number.

87840-01-5Downstream Products

87840-01-5Relevant articles and documents

Thermolabile Hydrocarbons, XX. Synthesis, Structure, and Strain of Sym. Tetraalkyl-1,2-diarylethanes

Kratt, Guenter,Beckhaus, Hans-Dieter,Lindner, Hans Joerg,Ruechardt, Christoph

, p. 3235 - 3263 (2007/10/02)

The syntheses of 18 1,1,2,2-tetraalkyl-1,2-diarylethanes 1 - 4 by dimerisation procedures starting with 10 - 13 are reported.In the absence of p-substituents X and with increasing alkyl side chains the α,p-dimers 6 or their aromatic counter parts 7 are obtained besides or instead of 1.The relationships between strain enthalpy Hs, bond lengths, bond angles, torsional angles, and rotational barrier are discussed on the basis of force field calculations.They are supported by two additional experimental structure determinations by X-ray diffraction.

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