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77902-60-4

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77902-60-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77902-60-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,9,0 and 2 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 77902-60:
(7*7)+(6*7)+(5*9)+(4*0)+(3*2)+(2*6)+(1*0)=154
154 % 10 = 4
So 77902-60-4 is a valid CAS Registry Number.

77902-60-4Relevant articles and documents

Alkoxycarbenium Ions. Relative Thermodynamic Stabilities via Pairwise Equilibrations.

Quirk, Roderic P.,Gambill, Charles R.,Thyvelikakath, George X.

, p. 3181 - 3186 (2007/10/02)

Alkoxycarbenium ions were synthesized by direct O-alkylation of the corresponding carbonyl compounds with trimethyloxonium ion salts and methyl fluorosulfate.The thermodynamic stabilities of the alkoxycarbenium ions were determined by stepwise equilibrations of pairs of these ions via transalkylation with the corresponding carbonyl compounds in liquid sulfur dioxide as monitored by 1H NMR.The structures, spectra, and stabilities of alkoxycarbenium ions have been compared with those of the corresponding hydroxycarbenium ions.In general, the relative stability order for alkoxycarbenium ions parallels the order of stabilities for the corresponding hydroxycarbenium ions.

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