The [Zn(NH$_3$)$_4$]$^{2+}$ reactions with quinaldinate or pyrazinoate : a ready synthetic route to zinc(II) coordination polymers?

Modec, Barbara (author), Podjed, Nina (author)

The reaction of [Zn(NH$_3$)$_4$]$^{2+}$ in aqueous ammonia solution with quinaldinic acid (quinoline-2-carboxylic acid) gave a mononuclear heteroleptic ammine/quinaldinate complex with the [Zn(quin)$_2$(NH$_3$)] composition. The introduced secondary ligand adopted the usual N,O-bidentate chelating coordination. In the analogous reaction with pyrazinoic acid (pyrazine-2-carboxylic acid), complete substitution of ammonia with pyrazionate and water was observed. A mixture of two compounds formed: a mononuclear and already known [Zn(pyraz)$_2$(H$_2$O)$_2$] and a novel one-dimensional (1D) coordination polymer [Zn(pyraz)$_2$(H$_2$O)]$_n$. X-ray structure analysis revealed the pyrazinoate ligands in [Zn(pyraz)$_2$(H$_2$O)]$_n$ in two binding modes, in a bidentate chelating coordination and in a tridentate bridging coordination. The bridging pyrazinoate has engaged in binding three out of four donors: a carboxylate oxygen and both nitrogen atoms. A detailed presentation of the structure of [Zn(pyraz)$_2$(H$_2$O)]$_n$ and its comparison with the structures of related compounds are given below.

• Language: English
• Keywords: coordination compounds, coordination polymers, zinc(II), quinaldinate, pyrazinoate, crystal structure
• 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: 2024
• Number of pages: 5 str.
• Numbering: Vol. 159, art. 111831
• PID: 20.500.12556/RUL-152974
• UDC: 546.47:547.8
• ISSN on article: 1387-7003
• DOI: 10.1016/j.inoche.2023.111831
• COBISS.SI-ID: 177212163
• Publication date in RUL: 13.12.2023

Record is a part of a journal

• Title: Inorganic chemistry communications
• Shortened title: Inorg. chem. commun.
• Publisher: Elsevier
• ISSN: 1387-7003
• COBISS.SI-ID: 759599

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

• Language: Slovenian
• Keywords: koordinacijske spojine, koordinacijski polimeri, cink(II), kinaldinat, pirazinoat, kristalna struktura

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P1-0134
• Name: Kemija za trajnostni razvoj

• Funder: ARRS - Slovenian Research Agency
• Project number: I0-0022
• Name: Mreža raziskovalnih infrastrukturnih centrov Univerze v Ljubljani (MRIC UL)