Cas 557089-13-1,Ethanone, 1,1'-(1,4,6-cycloheptatriene-1,4-diyl)bis[2-(1-methoxycyclohexyl)-

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Check Digit Verification of cas no

The CAS Registry Mumber 557089-13-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,7,0,8 and 9 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 557089-13:
(8*5)+(7*5)+(6*7)+(5*0)+(4*8)+(3*9)+(2*1)+(1*3)=181
181 % 10 = 1
So 557089-13-1 is a valid CAS Registry Number.

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557089-13-1Relevant academic research and scientific papers

Synthesis, stability and molecular structure of novel hydrocarbon cations consisting of a tropylium cation and two spiro[4.5]deca-2,4-dienes

Oda, Mitsunori,Kainuma, Hitoshi,Uchiyama, Takuya,Miyatake, Ryuta,Kuroda, Shigeyasu

, p. 2831 - 2841 (2003)

Two novel hydrocarbon cations with a tropylium ion ring fused by two spiro[4,5]deca-2,4-dienes, 9 and 10, were synthesized by a six-step sequence starting from 1,6- and 1,5-diacetyl-1,3,5-cycloheptatrienes, respectively. The pKR+ val

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