Lithium diorganocopper (Gilman) reagents are prepared by treatment of an organolithium compound with copper(I) iodide. Decide what lithium diorganocopper (Gilman) reagent is needed to convert 1-bromopropane into 1-pentene. Draw the structure of the organolithium compound that is used to prepare this Gilman reagent.
ether
2 R---- Li + Cul → R2CuLi
or THF