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21915-57-1

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21915-57-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21915-57-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,1 and 5 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 21915-57:
(7*2)+(6*1)+(5*9)+(4*1)+(3*5)+(2*5)+(1*7)=101
101 % 10 = 1
So 21915-57-1 is a valid CAS Registry Number.

21915-57-1Upstream product

21915-57-1Relevant articles and documents

Polyfluorinated quaternary ammonium salts of polyoxometalate anions: Fluorous biphasic oxidation catalysis with and without fluorous solvents

Maayan, Galia,Fish, Richard H.,Neumann, Ronny

, p. 3547 - 3550 (2003)

[Matrix presented] Polyfluorinated quaternary ammonium cations, [CF 3(CF2)7(CH2)3] 3CH3N+ (RFN+), were synthesized and used as countercations for the [WZnM2(H 2O)2(ZnW9O34)2] 12- (M = Mn(II), Zn(II)) polyoxometalate. The (RFN +)12[WZnM2(H20)2 (ZnW9O34)2] compounds were fluorous biphasic catalysts for alcohol and alkenol oxidation, and alkene epoxidation with aqueous hydrogen peroxide. Reaction protocols with or without a fluorous solvent were tested. The catalytic activity and selectivity was affected by both the hydrophobicity of the solvent and the substrate.

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