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Title: Nickel(ii) in chelate N<inf>2</inf>O<inf>2</inf> environment. DFT approach and in-depth molecular orbital and configurational analysis
Authors: Trifunović, Srećko
Miletić V.
Jevtić, Verica
Meetsma A.
Matović, Zoran
Journal: Dalton Transactions
Issue Date: 7-Oct-2013
Abstract: The O-N-N-O-type tetradentate ligands H2S,S-eddp (H 2S,S-eddp stands for S,S-ethylenediamine-N,N′-di-2-propionic acid) and H2edap (H2edap stands for ethylenediamine-N- acetic-N′-3-propionic acid) and the corresponding novel octahedral nickel(ii) complexes have been prepared and characterized. N2O 2 ligands coordinate to the nickel(ii) ion via four donor atoms (two deprotonated carboxylate atoms and two amine nitrogens) affording octahedral geometry in the case of all investigated Ni(ii) complexes. A six coordinate, octahedral geometry has been verified crystallographically for the s-cis-[Ni(S,S-eddp)(H2O)2] complex. Structural data correlating similarly chelated Ni(ii) complexes have been used to carry out an extensive configuration analysis. Molecular mechanics and Density Functional Theory (DFT) have been used to model the most stable geometric isomer, yielding, at the same time, significant structural and spectroscopic (TDDFT) data. The results from density functional studies have been compared to X-ray data. Natural Bond Orbital (NBO) and Natural Energetic Decomposition Analysis (NEDA) have been done for the [Ni(edda-type)(H2O)2-n] and nH 2O fragments. Molecular orbital analysis (MPA) is given as well. The infra-red and electronic absorption spectra of the complexes are discussed in comparison to the related complexes of known geometries. © 2013 The Royal Society of Chemistry.
Type: Article
DOI: 10.1039/c3dt51099a
ISSN: 14779226
SCOPUS: 84883543960
Appears in Collections:Faculty of Science, Kragujevac
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