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342891-52-5

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342891-52-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 342891-52-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,2,8,9 and 1 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 342891-52:
(8*3)+(7*4)+(6*2)+(5*8)+(4*9)+(3*1)+(2*5)+(1*2)=155
155 % 10 = 5
So 342891-52-5 is a valid CAS Registry Number.

342891-52-5Relevant articles and documents

Chemical transformations of cis-W(CO)4(C5H 5N)2 in the ring-opening metathesis polymerization of norbornene

Bencze,Biro,Szabo-Ravasz,Mihichuk

, p. 499 - 503 (2004)

The six-coordinate W0 complex cis-W(CO)4(C 5H5N)2 has been found to be active in the in situ formation of a carbene species from norbornene, which generates a typical ring-opening metathesis product (ROMP). A proposed mechanism of initiation suggests that the reaction involves a 2,3-hydrogen shift in the coordinated norbornene (η2 → η1). The initiating carbenoid group is identified from the products of the spontaneous carbene-CO coupling and Wittig reactions test. Formation of W(CO)3(η 6-C6H5CH3) when toluene is the solvent, followed by reaction with the carbene, is blamed for catalyst deactivation.

Reactions of Benzyl Carbinols with Fluorosulfuric Acid

Barrow, Colin J.,Bright, Steven T.,Coxon, James M.,Steel, Peter J.

, p. 2542 - 2549 (2007/10/02)

A series of benzyl carbinols have been reacted with HSO3F at -78 deg C, the solutions quenched, and the products isolated and identified.A variety of reaction modes occur including reduction (3-methyl- and 4-methyl-1-benzylcyclohexanol), rearrangement and

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