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81665-03-4

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81665-03-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81665-03-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,6 and 5 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 81665-03:
(7*8)+(6*1)+(5*6)+(4*6)+(3*5)+(2*0)+(1*3)=134
134 % 10 = 4
So 81665-03-4 is a valid CAS Registry Number.

81665-03-4Downstream Products

81665-03-4Relevant articles and documents

Perfluoroalkylation of the 2-Nitropropyl Anion. Evidence for an SRN1 Process

Feiring, Andrew E.

, p. 347 - 354 (2007/10/02)

The reaction of primary perfluoroalkyl iodides (RfI, Rf = n-C6F13, n-C8F17) and diiodides I(CF2)nI (n=4,6) with the 2-nitropropyl anion gives 2-(perfluoroalkyl)-2-nitropropanes.The anion was employed as the tetrabutylammonium salt in benzene or in organic solvent /water mixtures or as the lithium salt in dimethylformamide or dimethyl sulfoxide with and without UV irradiation.Evidence is presented for an SRN1 process by trapping of radical intermediates with benzene, styrene, methyl methacrylate, and vinyl acetate and by competition experiments with p-dinitrobenzene.Substitution of the nitro group in the 2-(perfluoroalkyl)-2-nitropropanes occurs under SRN1 conditions with 2-nitropropyl anion, benzenethiolate, and hydride.

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