Structural diversity of nickel and manganese chloride complexes with pyridin-2-one

Petriček, Saša (author)

Reactions of NiCl$_2$·6H$_2$O and pyridin-2-one (C$_5$H$_5$NO = Hhp) afforded novel molecular complexes, i.e., mononuclear [NiCl$_2$(Hhp)$_4$] (1), dinuclear [NiCl$_2$(Hhp)(H$_2$O)$_2$]$_2$·2Hhp (3) and [Ni$_2$Cl$_4$(Hhp)$_5$]·2MeCN (4), and an ionic complex [Ni(Hhp)$_6$]Cl$_2$ (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 µ$_2$-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 Ni$_2$(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 [MnCl$_2$(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.

• Language: English
• Keywords: Ni(II) complexes, Mn(II) complexes, pyridin-2-one, O-bridging ligand, crystal structure, thermal stability
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Publication status: Published
• Publication version: Version of Record
• Year: 2020
• Number of pages: 23 str.
• Numbering: Vol. 25, iss. 4, art. 846
• PID: 20.500.12556/RUL-133221
• UDC: 546.712:546.742:547.821
• ISSN on article: 1420-3049
• DOI: 10.3390/molecules25040846
• COBISS.SI-ID: 1538537155
• Publication date in RUL: 17.11.2021

Record is a part of a journal

• Title: Molecules
• Shortened title: Molecules
• Publisher: MDPI
• ISSN: 1420-3049
• COBISS.SI-ID: 18462981

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 14.02.2020

Secondary language

• Language: Slovenian
• Keywords: kompleksi Ni(II), kompleksi Mn(II), piridin-2-on, O-mostovni ligandi, kristalna struktura, termična obstojnost

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P1-0230
• Name: Organska kemija: sinteza, struktura in aplikacija

• Funder: ARRS - Slovenian Research Agency
• Project number: P1-0175
• Name: Napredna anorganska kemija