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75356-81-9

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75356-81-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 75356-81-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,3,5 and 6 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 75356-81:
(7*7)+(6*5)+(5*3)+(4*5)+(3*6)+(2*8)+(1*1)=149
149 % 10 = 9
So 75356-81-9 is a valid CAS Registry Number.

75356-81-9Relevant articles and documents

ZUR BILDUNGSWEISE VON 1-PHENYLPROPYLLITHIUM AUS BENZYLLITHIUM UND ETHYLEN IN TETRAHYDROFURAN

Maercker, Adalbert,Stoetzel, Reinhard

, p. 1 - 12 (2007/10/02)

3-Phenylpropyllithium primarily formed by the addition of benzyllithium to ethylene in THF does not undergo an intramolecular 1,3-proton shift to 1-phenylpropyllithium.Fast protonation by the solvent takes place instead, yielding n-propylbenzene and new ethylene.An equilibrium is then established between n-propylbenzene and additional benzyllithium, with the formation of toluene and 1-phenylpropyllithium; the equilibrium, however, strongly favours the starting materials (K293=1.1*10-4).As, on the other hand, 1-phenylpropyllithium reacts with ethylene much more rapidly than does benzyllithium, it is removed from the equilibrium and mainly branched secondary products are still obtained.

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