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55400-83-4

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55400-83-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 55400-83-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,4,0 and 0 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 55400-83:
(7*5)+(6*5)+(5*4)+(4*0)+(3*0)+(2*8)+(1*3)=104
104 % 10 = 4
So 55400-83-4 is a valid CAS Registry Number.

55400-83-4Downstream Products

55400-83-4Relevant articles and documents

Collisionally Activated Dissociation of 1-Benzyloxypyridinium Cations.

Katritzky, Alan R.,Dega-Szafran, Zofia,Watson, Clifford H.,Eyler, John R.

, p. 1051 - 1057 (2007/10/02)

Eighteen pyridine-ring substituted N-benzyloxypyridinium cations all dissociate by two alternative pathways to give (A) a cation C7H7+ and the substituted pyridine 1-oxide, and (B) a cation C7H7O+ and the substituted pyridine.Appearance potentials (Eapp) have been measured for both pathways; they are higher by 3-17 kcal mol-1 for the dominant pathway (A) than for (B).The Eapp values are compared with the ΔHf values calculated by the AM1 method for reactants and products demonstrating extensive rearrangement in a product-like transition state (TS) for pathway (A) but not for (B).Both sets of Eapp correlate roughly with Σ? for the pyridine ring substituents.For the 4-dimethylamino derivatives, two additional homolytic pathways are found to give (C) a cation Me2NC5H4NO+* and (D) the 4-dimethylaminopyridine radical cation.

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