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214981-28-9

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214981-28-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 214981-28-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,4,9,8 and 1 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 214981-28:
(8*2)+(7*1)+(6*4)+(5*9)+(4*8)+(3*1)+(2*2)+(1*8)=139
139 % 10 = 9
So 214981-28-9 is a valid CAS Registry Number.

214981-28-9Downstream Products

214981-28-9Relevant articles and documents

Tetrakis(2-thienyl)allene and 1,1,3,3-tetrakis(2-thienyl)allyl cation, an electron-rich reactive tetraarylallene and a remarkably stable tetraaryl- substituted allyl cation

Kurata, Hiroyuki,Monden, Masahisa,Kawase, Takeshi,Oda, Masaji

, p. 7135 - 7138 (1998)

Tetrakis(2-thienyl)allene was synthesized as an acid-sensitive tetraarylallene by dehydration of the corresponding tetrathienylallyl alcohol with anhydrous copper(II) sulfate. This electron-rich allene forms a remarkably stable tetrathienylallyl cation by protonation, undergoes Diels- Alder reaction with tetracyanoethylene, and is capable of tetrafold lithiation and functionalization.

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