Abstract
In benzene, neither sec-butyllithium ( 1) nor 3-methoxypropyllithium ( 2) react with ethylene, while in solutions containing 1 plus 2 3-methylpenty- llithium ( 3) is produced by ethylenation of 1. Clusters 1 n 2 4−n (n: 0 – 4) are indicated by NMR and 1 2 2 2 is deduced to be the most reactive species. At [ 2]:[ 1] = 2, the reaction order in 1 is 0.74, signifying reversible formation of a pre-reaction complex 1 2 2 2·ethylene.
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