Complexes with diastereoisomeric ligands. 1. Copper(II) complexes with the tridentate Schiff bases of (1R)-3-(hydroxymethylene)camphor or (1R)-2-(hydroxymethylene)menthone and (S)- or (R)-amino acids

Luigi Casella, Michele Gullotti, Alessandro Pasini, A. Rockenbauer

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40 Citations (Scopus)

Abstract

Copper(II) complexes with tridentate Schiff bases derived by the condensation of (+)-(hydroxymethylene)camphor or (+)-(hydroxymethylene)menthone with a series of (S)- and (R)-amino acids have been synthesized. Little interaction between the various chiral centers has been found and the conformation of the chelate rings depends mainly on the configuration of the α-carbon atom of the amino acid. ESR and electronic spectra results indicate that a competitive mechanism between the σ and π bondings, as well as between the different kinds of σ bondings of the complex, is operative. The variations of the K Fermi term are interpreted by considering an exchange polarization of the partially filled 4s orbital.

Original languageEnglish
Pages (from-to)2825-2835
Number of pages11
JournalInorganic Chemistry
Volume18
Issue number10
Publication statusPublished - 1979

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Camphor
camphor
Schiff Bases
imines
amino acids
Copper
Ligands
Amino Acids
copper
ligands
chelates
electronic spectra
Paramagnetic resonance
Conformations
Condensation
Carbon
condensation
Polarization
orbitals
Atoms

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

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abstract = "Copper(II) complexes with tridentate Schiff bases derived by the condensation of (+)-(hydroxymethylene)camphor or (+)-(hydroxymethylene)menthone with a series of (S)- and (R)-amino acids have been synthesized. Little interaction between the various chiral centers has been found and the conformation of the chelate rings depends mainly on the configuration of the α-carbon atom of the amino acid. ESR and electronic spectra results indicate that a competitive mechanism between the σ and π bondings, as well as between the different kinds of σ bondings of the complex, is operative. The variations of the K Fermi term are interpreted by considering an exchange polarization of the partially filled 4s orbital.",
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T1 - Complexes with diastereoisomeric ligands. 1. Copper(II) complexes with the tridentate Schiff bases of (1R)-3-(hydroxymethylene)camphor or (1R)-2-(hydroxymethylene)menthone and (S)- or (R)-amino acids

AU - Casella, Luigi

AU - Gullotti, Michele

AU - Pasini, Alessandro

AU - Rockenbauer, A.

PY - 1979

Y1 - 1979

N2 - Copper(II) complexes with tridentate Schiff bases derived by the condensation of (+)-(hydroxymethylene)camphor or (+)-(hydroxymethylene)menthone with a series of (S)- and (R)-amino acids have been synthesized. Little interaction between the various chiral centers has been found and the conformation of the chelate rings depends mainly on the configuration of the α-carbon atom of the amino acid. ESR and electronic spectra results indicate that a competitive mechanism between the σ and π bondings, as well as between the different kinds of σ bondings of the complex, is operative. The variations of the K Fermi term are interpreted by considering an exchange polarization of the partially filled 4s orbital.

AB - Copper(II) complexes with tridentate Schiff bases derived by the condensation of (+)-(hydroxymethylene)camphor or (+)-(hydroxymethylene)menthone with a series of (S)- and (R)-amino acids have been synthesized. Little interaction between the various chiral centers has been found and the conformation of the chelate rings depends mainly on the configuration of the α-carbon atom of the amino acid. ESR and electronic spectra results indicate that a competitive mechanism between the σ and π bondings, as well as between the different kinds of σ bondings of the complex, is operative. The variations of the K Fermi term are interpreted by considering an exchange polarization of the partially filled 4s orbital.

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