Unveiling ammonia’s dual role in the [Zn(NH$_3$)$_4$]SO$_4$$\cdot$H$_2$O synthesis : a Zn(II) ligand and nucleophile in the reaction with nitrile

Modec, Barbara (avtor), Podjed Rihtaršič, Nina (avtor)

As a follow-up of the studies on zinc(II) amidine complexes, solvothermal reactions involving zinc(II) sulfate heptahydrate, carboxylic acid (picolinic, pyrazinoic or quinoline-2-carboxylic acid), piperidine, nitrile (acetonitrile or propionitrile) and methanol were investigated. Two novel compounds were obtained and structurally characterized: the tetraamminezinc(II) complex [Zn(NH$_3$)$_4$]SO$_4$$\cdot$H$_2$O (1) and the amidinium salt (propioamH)(pipeH)SO$_4$ (4) (propioamH$^+$ = protonated amidine, pipeH$^+$ = piperidinium cation). Compound 1 formed through coordination of in-situ generated ammonia, arising from the partial hydrolysis of nitrile under harsh reaction conditions, to zinc(II) ions. The double salt 4 consists of protonated propionamidine and piperidinium cations with sulfate counter-anions. The amidine is formed by the nucleophilic addition of ammonia to the triple bond of propionitrile. In addition, two previously known complexes were obtained: pipeamH[Zn(pic)$_3$]·0.5H$_2$O (2) (pipeamH$^+$ = protonated amidine derived from piperidine and acetonitrile, pic$^–$ = anion of picolinic acid) and [Zn(quin)$_2$(NH$_3$)] (3) (quin$^–$ = anionic form of quinoline-2-carboxylic acid). These results expand the understanding of zinc(II)-mediated formation of amidine species and nitrile hydrolysis.

• Jezik: Angleški jezik
• Ključne besede: coordination chemistry, zinc(II), ammine complexes, amidine, nitrile hydrolysis
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2026
• Št. strani: Str. 325-339
• Številčenje: Vol. 79, iss. 4
• PID: 20.500.12556/RUL-181505
• UDK: 546.3/.9
• ISSN pri članku: 0095-8972
• DOI: 10.1080/00958972.2026.2613944
• COBISS.SI-ID: 274635779
• Datum objave v RUL: 09.04.2026

Gradivo je del revije

• Naslov: Journal of coordination chemistry
• Skrajšan naslov: J. coord. chem.
• Založnik: Taylor & Francis
• ISSN: 0095-8972
• COBISS.SI-ID: 25726976

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: koordinacijska kemija, cink(II), aminski kompleksi, amidin, hidroliza nitrila

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P1-0134
• Naslov: Kemija za trajnostni razvoj

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: I0-0022
• Naslov: Mreža raziskovalnih infrastrukturnih centrov Univerze v Ljubljani (MRIC UL)