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211620-74-5

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211620-74-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 211620-74-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,1,6,2 and 0 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 211620-74:
(8*2)+(7*1)+(6*1)+(5*6)+(4*2)+(3*0)+(2*7)+(1*4)=85
85 % 10 = 5
So 211620-74-5 is a valid CAS Registry Number.

211620-74-5Relevant articles and documents

Synthesis and structure of silicon compounds intramolecularly coordinated by hydrazino groups

Belzner, Johannes,Schaer, Dirk,Herbst-Irmer, Regine,Knelsel, Boris O.,Noltemeyer, Mathias

, p. 8481 - 8500 (2007/10/03)

Organosilicon compounds bearing the 2-(trimethylhydrazinomethyl)pbenyl and 2-(trimethylhydrazino)phenyl substituent have been prepared by treatment of the corresponding aryllithium with Me3SiCl and SiCl4. Subsequent reactions of chlorosilanes 10, 15, 18, and 22 afforded a variety of functionalized silanes. NMR spectroscopic data of most 2- (trimethylhydrazino)phenyl substituted silanes indicate a highly coordinated silicon center in solution. Diethoxy compound 20 is hexacoordinate in the solid state due to interaction with the hydrazino groups of both aromatic substituents, whereas in dichlorosilane 22 only the amino group of the 2- (trimethylhydrazino)phenyl substituent coordinates to the silicon center. The coordinating ability of the 2-(trimethylhydrazino)phenyl substituent has been used to stabilize silyl cations by formation of pentacoordinate siliconium ions 33 and 34.

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