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81942-58-7

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81942-58-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81942-58-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,9,4 and 2 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 81942-58:
(7*8)+(6*1)+(5*9)+(4*4)+(3*2)+(2*5)+(1*8)=147
147 % 10 = 7
So 81942-58-7 is a valid CAS Registry Number.

81942-58-7Downstream Products

81942-58-7Relevant articles and documents

N-Bridged Heterocycles. Part 5. α,ω-Bis-(2-oxobenzimidazolinyl)-alkanes and -ethers as Selective Ligands for Group-1 and -2 Metals

Meth-Cohn, Otto,Smith, David I.

, p. 261 - 270 (2007/10/02)

A series of the title compounds (10), (12), and (13) and several analogues were synthesised from the readily available 1-isopropenylbenzimidazolin-2-one.Various substituents were attached to the unsubstituted nitrogen atoms of the benzimidazolinone moieties and the series of products obtained were tested for their complexing ability with group-1 and -2 metal-salts.The isolation of crystalline complexes, the solubilisation of the salts in chloroform by ligand, the i.r. carbonyl absorption shift, and the ion-transport ability of the ligand were examined as an index of complexation.Selective complexation, particularly for calcium, was noted in several cases.

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