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62678-49-3

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62678-49-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 62678-49-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,2,6,7 and 8 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 62678-49:
(7*6)+(6*2)+(5*6)+(4*7)+(3*8)+(2*4)+(1*9)=153
153 % 10 = 3
So 62678-49-3 is a valid CAS Registry Number.

62678-49-3Relevant articles and documents

Thermolabile Hydrocarbons, XXII. Thermolysis of symm. Tetraalkyldiarylethanes and the Resonance Energy of α,α-Dialkylbenzyl Radicals

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

, p. 1748 - 1764 (2007/10/02)

The products and the activation parameters for the thermolysis reactions of the hydrocarbons 1 - 10 were determined.From correlations between ΔG% and the ground state strain Hsp or the change in strain during the dissociation process Dsp the steric acceleration of this reaction was analyzed quantitatively.A comparison of this analysis with a corresponding correlation for simple Cq - Cq alkanes results in a resonance energie of 8.4 +/- 1.1 kcal * mol-1 for α,α-dialkylbenzyl radicals.The origin of the appreciable variation of ΔS% in this series and for the poorer precision of ΔH% /Hsp correlations is discuss ed.

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