Which pi-clamped conjugated monocycles exhibit ring currents?
Quenching/survival of ring currents in pi-clamped conjugated monocycles is controlled by the match or mismatch in parity between the frontier orbitals of the central pi-conjugated 4n+2/4n monocycle and those of the clamps. Changes in ring current are not primarily caused by bond alternation or 'Mills-Nixon' effects; current and geometry changes on clamping are both consequences of electronic structure.
Havenith
Remco W A
RW
Department of Chemistry, University of Warwick, Coventry, UK.
Jenneskens
Leonardus W
LW
Fowler
Patrick W
PW
Soncini
Alessandro
A