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98970-55-9

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98970-55-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 98970-55-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,9,7 and 0 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 98970-55:
(7*9)+(6*8)+(5*9)+(4*7)+(3*0)+(2*5)+(1*5)=199
199 % 10 = 9
So 98970-55-9 is a valid CAS Registry Number.

98970-55-9Downstream Products

98970-55-9Relevant articles and documents

Kinetics of Ligand-exchange Reactions of Macrobicyclic Cryptands

Cox, Brian G.,Troung, Nguyen van,Schneider, Hermann

, p. 3285 - 3294 (2007/10/02)

The rate constants for exchange reactions between metal cryptate complexes, MCry1(n+), and a free cryptand, Cry2, have been determined in several solvents.Two mechanisms could be distinguished: a reaction proceeding via the free metal cation following dissociation of MCry1(n+), and a direct, bimolecular cation exchange between the two ligands.In solvents such as water, dimethylsulphoxide and dimethylformamide, which interact strongly with cations, the former pathway predominates for alkali-metal and alkaline-earth-metal cryptates.In poorly solvating media such as methanol and propylene carbonate, where dissociation rate constants are very low, bimolecular pathways make an important contribution to the overall exchange pathway.Exchange reactions of Ag(1+) cryptates show ligand-dependent rates and strong saturation effects in both methanol and dimethylsulphoxide.

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