Synthesis, structural characterization, and magnetic properties of the heteroleptic dinuclear nickel selenite complex [{Ni(TMEDA)SeO3} 2]

Massimiliano Delferro*, Claudia Graiff, Luciano Marchiò, Lisa Elviri, Marcello Mazzani, Mauro Riccò, Giovanni Predieri

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The reaction of Ni(NO3)2·6H2O with Na2SeO3 in the presence of tetramethylethylenediamine (TMEDA) in a water/ethanol mixture yielded the heteroleptic complex [{Ni(TMEDA)SeO3}2] (1). Single-crystal X-ray diffraction analysis showed that complex 1 consists of a dinuclear species in which the two nickel atoms are held together by two bridging selenito anions. The crystal packing of 1 is determined by networks of hydrogen bonds, involving cocrystalized water molecules and the oxygen atoms of the bridging SeO 32- groups. The two nickel ions in 1 exhibit antiferromagnetic coupling with J = -25.7 ± 0.1 cm-1, in good agreement with DFT calculations. In addition, when a less sterically hindered ancillary ligand, such as ethylenediamine (en), was used, the homoleptic complex [Ni(en)3](SeO3) (2) was obtained. The reaction of Ni(NO3)2·6H2O with Na 2SeO3 in the presence of tetramethylethylenediamine (TMEDA) yielded the heteroleptic complex [{Ni(TMEDA)SeO3} 2]. The two nickel ions exhibit antiferromagnetic coupling with J = -25.7 ± 0.1 cm-1, in good agreement with DFT calculations.

Original languageEnglish (US)
Pages (from-to)3327-3333
Number of pages7
JournalEuropean Journal of Inorganic Chemistry
Issue number22
DOIs
StatePublished - Aug 1 2011

Keywords

  • Density functional calculations
  • Magnetic properties
  • Nickel
  • Selenium

ASJC Scopus subject areas

  • Inorganic Chemistry

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