The first fully connected aromatic
carbaporphyrin dimer (6) and its bis-Pd complex (6-Pd
2
) that bear a rigid naphthalene
motif as an internal strap
were synthesized. These dimers consisted of two aromatic carbaporphyrins
that shared a naphthalene motif. The π-electron conjugation
of the obtained macrocycles was proposed to have two separated local
22 π-electron pathways and a 34 π-electron pathway. Their
weak aromaticity was fully supported by 1H NMR spectroscopy,
NICS values, ACID calculations, and ICSS plots.
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