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Complexation behavior of a highly preorganized 7,7-diphenylnorbornane-derived macrocycle: towards the design of

Antonio García Martínez1, José Osío Barcina, María del Rosario Colorado Heras

  • 1Departamento de Química Orgánica Facultad de Ciencias Químicas, Universidad Complutense Ciudad Universitaria, 28040 Madrid, Spain.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|February 22, 2003
PubMed

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The inscribed polygon method is consistent with Hückel’s 4n + 2 rule and helps to learn whether the given cyclic compound is aromatic or not. The compound is stable and aromatic if every bonding molecular orbital (MO) is completely filled with a pair of electrons. However, if the non-bonding or antibonding orbitals are filled with electrons, the compound is unstable and not aromatic. Consider the Frost circle diagrams for cycloalkenes containing 4 to 8 carbons.
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Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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