ǂThe ǂ[Zn(NH [sub] 3) [sub] 4] [sup] 2+ reactions with quinaldinate or pyrazinoate

ǂa ǂready synthetic route to zinc(II) coordination polymers?

Barbara Modec (Author), Nina Podjed (Author)

Abstract

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.

Keywords

koordinacijske spojine;koordinacijski polimeri;cink(II);kinaldinat;pirazinoat;kristalna struktura;coordination compounds;coordination polymers;zinc(II);quinaldinate;pyrazinoate;crystal structure;

Data

Language:	English
Year of publishing:	2024
Typology:	1.01 - Original Scientific Article
Organization:	UL FKKT - Faculty of Chemistry and Chemical Technology
UDC:	546.47:547.8
COBISS:	177212163
ISSN:	1387-7003
Views:	649
Downloads:	35
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	koordinacijske spojine;koordinacijski polimeri;cink(II);kinaldinat;pirazinoat;kristalna struktura;
Type (COBISS):	Article
Pages:	str. 1-5
Issue:	ǂVol. ǂ159, [article no.] 111831
Chronology:	Jan. 2024
DOI:	10.1016/j.inoche.2023.111831
ID:	21682009