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257863-42-6

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257863-42-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 257863-42-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,8,6 and 3 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 257863-42:
(8*2)+(7*5)+(6*7)+(5*8)+(4*6)+(3*3)+(2*4)+(1*2)=176
176 % 10 = 6
So 257863-42-6 is a valid CAS Registry Number.

257863-42-6Relevant articles and documents

Electrophilic Substitution of 1,1,2,2,9,9,10,10-Octafluoro[2.2]paracyclophane

Roche, Alex J.,Dolbier Jr., William R.

, p. 9137 - 9143 (2007/10/03)

Nitration of octafluoro[2.2]paracyclophane (OFP) provides an entry into the synthesis of a series of 11 monosubstituted OFPs, including the nitro, amino, chloro, bromo, iodo, hydroxy, and trifluoromethyl compounds. The NMR, mass spectrometric, and UV spectral properties of all of these derivatives are presented and discussed, and they are compared with those of its hydrocarbon analogue, [2.2]paracyclophane.

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