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111409-83-7

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111409-83-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 111409-83-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,4,0 and 9 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 111409-83:
(8*1)+(7*1)+(6*1)+(5*4)+(4*0)+(3*9)+(2*8)+(1*3)=87
87 % 10 = 7
So 111409-83-7 is a valid CAS Registry Number.

111409-83-7Relevant articles and documents

Towards the synthesis of tetraethynylallene

Lange, Tim,Van Loon, Jan-Dirk,Tykwinski, Rik R.,Schreiber, Martin,Diederich, Francois

, p. 537 - 550 (1996)

Synthetic routes towards tetraethynylallene (4), a perethynylated modular entity for the construction of three-dimensional all-carbon networks and all-carbon backbone polymers with a stepladder or helical structure, are presented. They comprise propargylic rearrangements, cyclopropanations with carbenes, Peterson and Wittig-type olefinations, and alkylations of ketones with α-bromovinyl anions.

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