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1777-42-0

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1777-42-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1777-42-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,7 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1777-42:
(6*1)+(5*7)+(4*7)+(3*7)+(2*4)+(1*2)=100
100 % 10 = 0
So 1777-42-0 is a valid CAS Registry Number.

1777-42-0Relevant articles and documents

REACTIONS OF DICHLOROCARBENE AND OF THE SIMMONS-SMITH REAGENT WITH THE DIMER AND TRIMER OF CYCLOPENTADIENE AND THE DIMER OF SPIROHEPTA-4,6-DIENE

Molchanov, A. P.,Kostikov, R. R.,Chernyshev, V. A.

, p. 1444 - 1449 (2007/10/02)

Dichlorocarbene reacts with the exo dimer of cyclopentadiene (exo-tricyclo2,6>deca-3,8-diene) and the trimer of cyclopentadiene (exo-endo-pentacyclo2,7.09,13>pentadeca-4,10-diene) at the cyclopentene double bond.The Simmons-Smith reagent, prepared from methylene iodide in presence of a zinc-silver couple, reacts with the same hydrocarbons and also with the dimer of spirohepta-4,6-diene 2,6>deca-3,8-diene)-10-spirocyclopropane> nonselectively at both double bonds, whereas it adds to the trimer of cyclopentadiene only at the norbornene double bond.

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