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109188-79-6

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109188-79-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109188-79-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,1,8 and 8 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 109188-79:
(8*1)+(7*0)+(6*9)+(5*1)+(4*8)+(3*8)+(2*7)+(1*9)=146
146 % 10 = 6
So 109188-79-6 is a valid CAS Registry Number.

109188-79-6Downstream Products

109188-79-6Relevant articles and documents

Stilbenes from Sulfur-Mediated Dehydrodimerization of Substituted Toluenes

Sickle, Dale E. Van

, p. 3263 - 3267 (1991)

When provision is made for removal of coproduct hydrogen sulfide, the reaction of sulfur with methyl p-toluate (MPT; 1) at 280 deg C leads to 70+percent yields of the product dimethyl trans-4,4'-stilbenedicarboxylate (DMSC, 2) if conversion of the MPT is restricted to ca 10percent.Diphenyl ether or excess MPT serves as the reaction solvent.Other products of the reaction include dimethyl 4,4'-bibenzyldicarboxylate (DBD, 3), 1,2,3-tris(4-carbomethoxyphenyl)propane (4), 1,2,3-tris(4-carbomethoxyphenyl)propene (5; mixture of E and Z isomers), and 2,3,4,5-tetrakis(4-carbomethoxyphenyl)thiophene (6).The products are consistent with the reversible formation of 4-carbomethoxybenzyl radicals from sulfur and MPT where removal of the hydrogen sulfide drives the reaction forward.

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