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75700-89-9

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75700-89-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 75700-89-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,7,0 and 0 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 75700-89:
(7*7)+(6*5)+(5*7)+(4*0)+(3*0)+(2*8)+(1*9)=139
139 % 10 = 9
So 75700-89-9 is a valid CAS Registry Number.

75700-89-9Relevant articles and documents

Aquo chemistry of monoarene complexes of osmium(II) and ruthenium(II)

Hung, Yann,Kung, Wei-Jen,Taube, Henry

, p. 457 - 463 (2008/10/08)

A number of derivatives of η-C6H6OsII (BzOsII) were prepared, exploiting the three positions not preempted by the arene ring and emphasizing ligands which are saturated. The species synthesized include [BzOs(NH3)3]2+, [BzOs(NH3)2Cl]+, and [BzOs(en)Cl]+. It was shown that a 2+ ion, presumably [BzOs(H2O)3]2+, is produced in an acidic solution of BzOsCl2 when Cl- is removed by Ag+. The determination of the acidity of the coordinated water for the aquo species is complicated by the condensation of the hydroxo form. However, [BzOs(en)H2O]2+ prepared from [BzOs(en)Cl]+ by adding Ag+ behaves normally, and the value of pKa was found to be 6.3 at 20°C; for [BzOs(NH3)2H2O]2+ it was found to be 6.4, and for [BzRu(en)H2O]2+ it is 7.9. The quotient governing association of Cl- with [BzOs(en)H2O]2+ was measured as 1.1 × 102. The acidity of the aquo ion and the stability of the chloride complex testify to the electron-withdrawing ability of the arene ring.

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