title: Fused core-modified planar antiaromatic 32π heptaphyrins: unusual synthesis and structural diversity.
abstract: The condensation reaction of fused dithienothiophene (DTT) diol with a core-modified tripyrrane led to the formation of acid and its concentration dependent products, sapphyrin and heptaphyrin. The single crystal X-ray analysis of sulphur and selenium heptaphyrin exhibits planar conformation owing to fusion. The experimental and theoretical calculations revealed the antiaromatic electronic structure of Hückel 4nπ.
authors.affiliation: School of Chemical Sciences, National Institute of Science Education and Research (NISER), Institute of Physics Campus, Sainik School - P. O., Bhubaneswar - 751 005, Odisha, India. tkc@niser.ac.in.
authors.forename: Ganesan
authors.initials: G
authors.lastname: Karthik
authors.forename: A
authors.initials: A
authors.lastname: Srinivasan
authors.forename: C H
authors.initials: CH
authors.lastname: Suresh
authors.forename: Tavarekere K
authors.initials: TK
authors.lastname: Chandrashekar