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1233704-34-1

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1233704-34-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1233704-34-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,3,7,0 and 4 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1233704-34:
(9*1)+(8*2)+(7*3)+(6*3)+(5*7)+(4*0)+(3*4)+(2*3)+(1*4)=121
121 % 10 = 1
So 1233704-34-1 is a valid CAS Registry Number.

1233704-34-1Relevant articles and documents

Synthesis of [RhCl(CO)(cyclopentadienone)]2 from [RhCl(cod)]2 and a 1,6-diyne under CO: Application to Rh(i)-catalyzed tandem [2+2+1] carbonylative cycloaddition of diynes and Claisen rearrangement

Lee, Sang Ick,Fukumoto, Yoshiya,Chatani, Naoto

, p. 3345 - 3347 (2010/07/20)

Although Rh(i)Cl(CO)(cpd) (cpd = cyclopentadienone) complexes were identified more than 40 years ago, their exact structures have not been determined because of the polymeric nature of these complexes. We determined the structure of [Rh(i)Cl(CO)(cpd)]2, which was formed by the reaction of [Rh(cod)Cl]2 with a 1,6-diyne under CO. In addition, based on determination of the structure of the [Rh(i)Cl(CO)(cpd)]2 complex, we identified a new catalytic tandem reaction - the Rh-catalyzed [2+2+1] carbonylative cycloaddition of phenoxide-substituted diynes and Claisen rearrangement.

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