Structural diversity in the coordination compounds of cobalt, nickel and copper with N-alkylglycinates: crystallographic and ESR study in the solid state

Vušak, Darko; Smrečki, Neven; Muratović, Senada; Žilić, Dijana; Prugovečki, Biserka; Matković-Čalogović, Dubravka (2021) Structural diversity in the coordination compounds of cobalt, nickel and copper with N-alkylglycinates: crystallographic and ESR study in the solid state. RSC Advances, 11 . pp. 23779-23790. ISSN 2046-2069

Preview

PDF - Published Version - article
Available under License Creative Commons Attribution.
Download (1MB) | Preview

Official URL: https://pubs.rsc.org/en/content/articlelanding/202...

Abstract

Reactions of N-methylglycine (HMeGly), N- ethylglycine-hydrochloride (H2EtGlyCl) and N- propylglycine-hydrochloride (H2PrGlyCl) with cobalt(II), nickel(II) and copper(II) ions in aqueous solutions resulted in ten new coordination compounds [Co(MeGly)2(H2O)2] (1), [{; ; ; Co(MeGly)2}; ; ; 2(μ-OH)2]·2H2O (1d), [Cu(MeGly)2(H2O)2] (2), [Co(EtGly)2(H2O)2] (3), [Ni(EtGly)2(H2O)2] (4), [Cu(μ-EtGly)2]n (5p), [Co(PrGly)2(H2O)2] (6), [Ni(PrGly)2(H2O)2] (7), and two polymorphs of [Cu(PrGly)2(H2O)2] (8α and 8β). Compounds were characterized by single-crystal and powder X- ray diffraction, infrared spectroscopy, thermal analysis and X-band electron spin resonance (ESR) spectroscopy. These studies revealed a wide range of structural types including monomeric, dimeric and polymeric architectures, as well as different polymorphs. In all monomeric compounds, except 2, and in the coordination polymer 5p hydrogen bonds interconnect the molecules into 2D layers with the alkyl chain pointing outward of the layer. In 2 and in the dimeric compound 1d hydrogen bonds link the molecules into 3D structures. 1d with cobalt(III), and 4 and 7 with nickel(II) are ESR silent. ESR spectra of 1, 3 and 6 are characteristic for paramagnetic high-spin cobalt(II). ESR spectra of all copper(II) coordination compounds show that the unpaired copper electron is located in the d_(x^2-y^2 ) orbital, being in agreement with the elongated octahedral geometry

Item Type:

Article

Uncontrolled Keywords:

cobalt ; nickel ; copper ; N-alkylglycinates

Subjects:

NATURAL SCIENCES > Chemistry

Divisions:

Division of Physical Chemistry

Projects:

Project title	Project leader	Project code	Project type
Esencijalni metalni ioni u proteinima iz Heliobacter pylori i modelnim spojevima-struktura u funkcija/svojstvo-ProtModStruct	Dubravka Matković-Čalogović	IP-2014-09-4274	HRZZ
Studija važnosti spinskih međudjelovanja kao osnova za nove pristupe u istraživanju materijala-SPES	Marina Ilakovac-Kveder	IP-2018-01-3168	HRZZ

Depositing User:

Dijana Žilić

Date Deposited:

10 Aug 2021 09:08

URI:

http://fulir.irb.hr/id/eprint/6525

DOI:

10.1039/D1RA04219J