Next Article in Journal
Honey as Source of Nitrogen Compounds: Aromatic Amino Acids, Free Nucleosides and Their Derivatives
Previous Article in Journal
2-Butyl-2-tert-butyl-5,5-diethylpyrrolidine-1-oxyls: Synthesis and Properties
Previous Article in Special Issue
Synthesis and Crystal Chemistry of Octahedral Rhodium(III) Chloroamines
Open AccessArticle

Structural Diversity of Nickel and Manganese Chloride Complexes with Pyridin-2-One

Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
Molecules 2020, 25(4), 846; https://doi.org/10.3390/molecules25040846 (registering DOI)
Received: 11 January 2020 / Revised: 5 February 2020 / Accepted: 11 February 2020 / Published: 14 February 2020
(This article belongs to the Special Issue Advances in Coordination Chemistry)
Reactions of NiCl2·6H2O and pyridin-2-one (C5H5NO = Hhp) afforded novel molecular complexes, i.e., mononuclear [NiCl2(Hhp)4] (1), dinuclear [NiCl2(Hhp)(H2O)2]2.2Hhp (3) and [Ni2Cl4(Hhp)5]·2MeCN (4), and an ionic complex [Ni(Hhp)6]Cl2 (2). Single-crystal X-ray analyses revealed two modes of Hhp ligation in these complexes: a monodentate coordination of carbonyl oxygen in all of them and an additional µ2-oxygen bridging coordination in the dinuclear complex 4. Three bridging molecules of Hhp span two nickel(II) ions in 4 with a 2.9802 (5) Å separation of the metal ions. Complex 3 is a chlorido-bridged nickel dimer with a planar Ni2(µ-Cl)2 framework. Hydrogen bonds and parallel stacking arrangements of the Hhp molecules govern the connectivity patterns in the crystals, resulting in 1D structures in 1 and 5 or 2D in 3. A single manganese compound [MnCl2(Hhp)4] (5), isostructural to 1, was isolated under the similar conditions. This is in contrast to four nickel(II) chloride complexes with Hhp. Thermal analyses proved the stability of complexes 1 and 3 in argon up to 145 °C and 100 °C, respectively. The decomposition of 1 and 3 yielded nickel in argon and nickel(II) oxide in air at 800 °C. View Full-Text
Keywords: Ni(II) complexes; Mn(II) complexes; pyridin-2-one; O-bridging ligand; crystal structure; thermal stability Ni(II) complexes; Mn(II) complexes; pyridin-2-one; O-bridging ligand; crystal structure; thermal stability
Show Figures

Figure 1

MDPI and ACS Style

Petriček, S. Structural Diversity of Nickel and Manganese Chloride Complexes with Pyridin-2-One. Molecules 2020, 25, 846.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop