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1028292-91-2

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1028292-91-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1028292-91-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,8,2,9 and 2 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1028292-91:
(9*1)+(8*0)+(7*2)+(6*8)+(5*2)+(4*9)+(3*2)+(2*9)+(1*1)=142
142 % 10 = 2
So 1028292-91-2 is a valid CAS Registry Number.

1028292-91-2Relevant articles and documents

Synthesis, structure, and nucleophile-induced rearrangements of spiroketones

Maslak, Przemyslaw,Varadarajan, Sridhar,Burkey, Jeffrey D.

, p. 8201 - 8209 (2007/10/03)

Three tetraketones based on the 2,2'-spirobiindan-1,1',3,3'-tetraone skeleton were prepared and investigated. All three compounds show spiroconjugation between their perpendicular π-networks. The interaction results in lowering of the energy of the LUMO of the systems by ca. 0.2-0.3 eV as compared to non-spiroconjugated models. The spiroketones are susceptible to nucleophile-induced retro-Claisen condensations that lead to molecular rearrangements destroying spiro connectivity.

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