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97222-19-0

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97222-19-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 97222-19-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,2,2 and 2 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 97222-19:
(7*9)+(6*7)+(5*2)+(4*2)+(3*2)+(2*1)+(1*9)=140
140 % 10 = 0
So 97222-19-0 is a valid CAS Registry Number.

97222-19-0Relevant articles and documents

Iron(III) complexation behavior of benzene-centered tripodal mono-, di- and tritopic ligands carrying a repeating -Ahe-(HO)Apr- sequence [Ahe = 6-aminohexanoyl; (HO)Apr = 3-(N-hydroxy)-aminopropanoyl]

Tsubouchi,Shen,Hara,Akiyama

, p. 275 - 282 (2001)

To investigate how three-directional molecules behave upon complexation with ferric iron, tripodal 1,3,5-benzene-centered mono-, di- and tritopic iron-chelating ligands {C6H3[CO-(Ahe-(HO)Apr)n-OH]3: 1, n = 1; 2, n = 2; 3, n = 3}, composed of strands containing an -Ahe-(HO)Apr- sequence [Ahe = 6-aminohexanoyl; (HO)Apr = 3-(N-hydroxy)aminopropanoyl], were synthesized. These hydroxamate ligands form intramolecular six-coordinate octahedral complexes with Fe(III): Fe1-1, Fe1-2, Fe2-2, Fe1-3, Fe2-3 and Fe3-3. The complexes formed were investigated from a topological viewpoint and examined in terms of stability against attack by H+ and HO-, monoprotonation equilibrium and iron removal kinetics using a 20-molar excess of EDTA. Fe1-1, Fe1-2 and Fe2-2 have tripodal interstrand structures. In particular, the iron removal reaction of Fe2-2 shows a consecutive first-order reaction pattern. From kinetic data of the first-order reactions, Fe1-3, Fe2-3 and Fe3-3 are concluded to possess one, two and three discrete ferrioxamine-type (intrastrand) structures, respectively.

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