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219838-89-8

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219838-89-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 219838-89-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,8,3 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 219838-89:
(8*2)+(7*1)+(6*9)+(5*8)+(4*3)+(3*8)+(2*8)+(1*9)=178
178 % 10 = 8
So 219838-89-8 is a valid CAS Registry Number.

219838-89-8Relevant articles and documents

(Amidomethyl)pyridine zirconium and hafnium complexes: Synthesis and structural characterization

Nienkemper, Katrin,Kehr, Gerald,Kehr, Seda,Fr?hlich, Roland,Erker, Gerhard

, p. 1572 - 1589 (2008/09/18)

A series of 2-formyl and 2-acetylpyridines was condensed with 2,6-diisopropylaniline to yield the corresponding imines. Their reaction with sodium borohydride gave the respective N-arylaminomethylpyridines. Treatment of the N-arylformimino- or -acetiminopyridines with trimethylaluminum followed by hydrolysis furnished a series of the respective substituted N-arylaminoethylpyridine derivatives. Their reaction with tetrabenzylzirconium or tetrakis(dimethylamido)zirconium or -hafnium gave the corresponding (chelate ligand)MX3 systems in a variety of cases. Some of these gave very active ethene polymerization catalysts upon activation with methylalumoxane. Six of the neutral aminoalkylpyridines were characterized by X-ray diffraction, as were eight of the zirconium or hafnium complexes and two aluminum chelate complex systems.

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