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876665-57-5

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876665-57-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 876665-57-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,6,6,6 and 5 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 876665-57:
(8*8)+(7*7)+(6*6)+(5*6)+(4*6)+(3*5)+(2*5)+(1*7)=235
235 % 10 = 5
So 876665-57-5 is a valid CAS Registry Number.

876665-57-5Downstream Products

876665-57-5Relevant articles and documents

Synthesis of molybdenocene(IV) and tungstenocene(IV) tropolonato complexes: Its derivative containing calix[4]arene moiety

Minato, Makoto,Ren, Jian-Guo,Kasai, Masahiko,Munakata, Koji,Ito, Takashi

, p. 282 - 286 (2006)

The cationic di-μ-hydroxo dinuclear complexes of molybdenocene and tungstenocene [Cp2M(μ-OH)2MCp2]+ (Cp = η-C5H5; M = Mo or W) react with tropolone to afford corresponding tropolonato complexes [Cp2M(trop)]+ (trop = C7H5O2). The products were investigated by IR, 1H NMR, and 13C NMR spectroscopy as well as by X-ray crystallography (M = W). The structure shows that the central metal is surrounded by a distorted tetrahedral array of the two centers of cyclopentadienyl ligands and the two oxygen atoms of tropolonato ligand. The reaction has been extended to the synthesis of calix[4]arene receptor functionalized at the 1,3-positions of the upper rim with two tropolonato-molybdenocene centers.

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