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134940-88-8

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134940-88-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 134940-88-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,9,4 and 0 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 134940-88:
(8*1)+(7*3)+(6*4)+(5*9)+(4*4)+(3*0)+(2*8)+(1*8)=138
138 % 10 = 8
So 134940-88-8 is a valid CAS Registry Number.

134940-88-8Downstream Products

134940-88-8Relevant articles and documents

Formation of organodilithium compounds via lithium-tin exchange

Ashe III, Arthur J.,Lohr, Lawrence L.,Al-Taweel, Samir M.

, p. 2424 - 2431 (1991)

The reaction of methyllithium in THF with 2,5-bis(trimethylstannyl)-1,5-hexadiene (6) affords 2,5-dilithio-1,5-hexadiene (2) via the intermediacy of lithium stannates. The similar reaction of (2Z,4Z)-2,5-bis(trimethylstannyl)-2,4-hexadiene (11) affords (2E,4E)-2,5-dilithio-2,4-hexadiene (3). The more favorable formation of 3 suggests a greater relative stability over 2. Ab initio calculations indicate that the symmetrical dilithium-bridged structure found for 3 is more favorable than the unsymmetrical dilithium-bridged structure found for 2.

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