Electronic structure and spectroscopy of nickel(II), palladium(II), and platinum(II) acetylacetonate complexes

Frederick D. Lewis, Gwen D. Salvi, David R. Kanis, Mark A Ratner

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Abstract

The electronic structure and optical spectra of Ni(acac)2 and Pd(acac)2 have been investigated using the semiemperical INDO/S-SCF-CI (ZINDO) algorithm. The results of the electronic structure calculations are in good agreement with those of previous ab initio calculations for these complexes. Increasing the atomic number of the metal is found to increase the metal-ligand covalency, to increase the separation of the two highest occupied and two lowest unoccupied, ligand-localized (π and π*) molecular orbitals, and to decrease the separation between the highest occupied and lowest unoccupied molecular orbitals. The effects of electronic relaxation (due to Coulomb and exchange integrals) and configuration interaction on the calculated energies of singlet-singlet transitions are analyzed using Platt diagrams to illustrate the origin of the d→d transitions, observed for Ni(acac)2 but not for Pd(acac)2 or Pt(acac)2, and the increasing complexity of the ultraviolet portion of the spectrum with increasing atomic number. Thus the ZINDO calculations provide the basis for the first detailed rationalization of the complex optical spectra of the group 10(II) β-diketonates.

Original languageEnglish
Pages (from-to)1251-1258
Number of pages8
JournalInorganic Chemistry
Volume32
Issue number7
Publication statusPublished - 1993

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Palladium
Platinum
Nickel
Electronic structure
palladium
platinum
nickel
Spectroscopy
Molecular orbitals
electronic structure
optical spectrum
molecular orbitals
Metals
spectroscopy
Ligands
ligands
metals
configuration interaction
self consistent fields
diagrams

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Electronic structure and spectroscopy of nickel(II), palladium(II), and platinum(II) acetylacetonate complexes. / Lewis, Frederick D.; Salvi, Gwen D.; Kanis, David R.; Ratner, Mark A.

In: Inorganic Chemistry, Vol. 32, No. 7, 1993, p. 1251-1258.

Research output: Contribution to journalArticle

Lewis, Frederick D. ; Salvi, Gwen D. ; Kanis, David R. ; Ratner, Mark A. / Electronic structure and spectroscopy of nickel(II), palladium(II), and platinum(II) acetylacetonate complexes. In: Inorganic Chemistry. 1993 ; Vol. 32, No. 7. pp. 1251-1258.
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