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19759-89-8

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19759-89-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19759-89-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,7,5 and 9 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 19759-89:
(7*1)+(6*9)+(5*7)+(4*5)+(3*9)+(2*8)+(1*9)=168
168 % 10 = 8
So 19759-89-8 is a valid CAS Registry Number.
InChI:InChI=1/C23H25N5/c1-26(2)19-13-9-17(10-14-19)23(18-11-15-20(16-12-18)27(3)4)28-22-8-6-5-7-21(22)24-25-28/h5-16,23H,1-4H3

19759-89-8Relevant articles and documents

Nucleophilic reactivities of the anions of nucleobases and their subunits

Breugst, Martin,Corralbautista, Francisco,Mayr, Herbert

supporting information; experimental part, p. 127 - 137 (2012/03/09)

The kinetics of the reactions of different heterocyclic anions derived from imidazoles, purines, pyrimidines, and related compounds with benzhydrylium ions and structurally related quinone methides have been studied in DMSO and water. The second-order rate constants (logk2) correlated linearly with the electrophilicity parameters E of the electrophiles according to the correlation logk2 = sN(N+E) (H. Mayr, M. Patz, Angew. Chem. 1994, 106, 990-1010; Angew. Chem. Int. Ed. Engl. 1994, 33, 938-957) allowing us to determine the nucleophilicity parameters N and sN for these anions. In DMSO, the reactivities of these heterocyclic anions vary by more than six orders of magnitude and are comparable to carbanions, amide and imide anions, or amines. The azole anions are generally four to five orders of magnitude more reactive than their conjugate acids. Copyright

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