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212317-85-6

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212317-85-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 212317-85-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,2,3,1 and 7 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 212317-85:
(8*2)+(7*1)+(6*2)+(5*3)+(4*1)+(3*7)+(2*8)+(1*5)=96
96 % 10 = 6
So 212317-85-6 is a valid CAS Registry Number.

212317-85-6Relevant articles and documents

Branched polycyclic tetrazole systems. 1. Synthesis and structure of 2-(5-tetrazolyl)ethyl derivatives of some CH-, OH-, and NH-acids

Zubarev,Gurskaya,Zavodnik,Ostrovskii

, p. 1292 - 1298 (1997)

The cycloaddition of dimethylammonium azide to the nitrile groups of 2-cyanoethyl derivatives of CH-, OH-, and NH-acids leads to open-chain branched structures containing terminal NH-tetrazolyl groups. An x-ray diffraction structural analysis of tris[2-(5-tetrazolyl)ethyl]nitromethane revealed steric access of the equivalent NH-tetrazolyl rings of the branched system. In going from the branched nitrile substrates to the corresponding tetrazoles, the PMR spectra show a breakdown in the resolution of the multiplet components, which had not been observed previously for monocyclic 5-substituted tetrazoles. A dependence was found for the 13C NMR chemical shifts on the pKa values, reflecting the NH-addity of the branched polycyclic tetrazoles in water.

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