- octaethylsemibullvalene,
itself formed by copper(I)
bromide mediated cyclodimerisation of 1,2,3,4-tetraethyl-1,4-dilithio-1,3-butadiene.
Because COT is unstable...
- temperature. The
derivative CH3B=C(SiMe3)2 is
fairly stable, but
prone to
cyclodimerisation. Some boron-substituted
heterocycles are aromatic, but very few such...
-
procedure for
alkylated semibullvalenes published in 2006 is
based on
cyclodimerisation of a
substituted 1,4-dilithio-1,3-butadiene with copper(I) bromide...
