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6157-21-7

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6157-21-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 6157-21-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,1,5 and 7 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 6157-21:
(6*6)+(5*1)+(4*5)+(3*7)+(2*2)+(1*1)=87
87 % 10 = 7
So 6157-21-7 is a valid CAS Registry Number.

6157-21-7Relevant articles and documents

Catalytic metathesis of conjugated diynes

Lysenko, Sergej,Volbeda, Jeroen,Jones, Peter G.,Tamm, Matthias

supporting information; experimental part, p. 6757 - 6761 (2012/08/13)

The tungsten benzylidyne complex [PhC≡W{OSi(OtBu)3} 3] efficiently catalyzes the metathesis of conjugated diynes and ring-closing diyne metathesis (see scheme). Although this reaction implies C-C single-bond activation, 13C labeling studies reveal that it proceeds by classical alkylidyne group exchange and involves cleavage and formation of carbon-carbon triple bonds. Copyright

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