Molecular Structures and Spin‐States of Pseudohalide Metal Complexes with Hydrazones of Girard's T Reagent

Abstract

Pseudohalide metal complexes with hydrazones of the Girard T reagent are reviewed with respect to their synthesis, characterization, structures (both in solution and in the solid state), and magnetic properties. It is hoped that this micro-[a] She is Chief of the Department of General and Inorganic Chemistry. Her main research interests are coordination and bioinorganic chemistry. The focus of her work in recent years has been investigations of structure-activity relationships of biologically active metal complexes and their possible applications. Iztok Turel is Professor of Inorganic Chemistry at the University of Ljubljana, Slovenia. He is (co)author of more than 110 publications, with a Hirsch index of 35. His main research interests are coordination and bioinorganic chemistry. His group focuses on interactions of biologically active ligands (quinolones, azoles, diketonates, hydrazones, hydroxyquinolines, pyrithione, etc) with metal ions. The focus of his work in recent years has been on ruthenium complexes and their applications (biological activity, catalysis). Eur. J. Inorg. Chem. 2018, 838-846 www.eurjic.org 840 Scheme 3. Structure of isothiocyanato iron(III) complex [Fe(L 1 )(NCS) 2 (H 2 O)] (1) with the condensation product of the Girard T reagent and 5-bromosalicylaldehyde (H 2 L 1 Cl). 841 high-spin state (μ eff = 5.81 μ B ) and acts as ordinary paramagnet down to 2 K. [27] Pseudohalide Metal Complexes with the Condensation Product of 3-Hydroxy-5-(hydroxymethyl)-2-methylpyridine-4-carboxaldehyde and the Girard T ReagentEur.

Cobalt(II), Zinc(II), Iron(III), and Copper(II) Complexes Bearing Positively Charged Quaternary Ammonium Functionalities: Synthesis, Characterization, Electrochemical Behavior, and SOD Activity

“…In that line, we have been studied PBP 3 d metal complexes of diacetylpyridine bis(hydrazone) ligands,, , , as well as hydrazine complexes with positively charged quaternary ammonium groups from the Girard's T reagent . Motivated by above discussed aspects of such complexes, we have herein synthesized and characterized Co(II), Zn(II), Fe(III) and Cu(II) complexes of 2,2'‐[2,6‐pyridinediylbis(ethylidyne‐1‐hydrazinyl‐2‐ylidene)]bis[ N,N,N ‐trimethyl‐2‐oxoethanaminium] dichloride ( H 2 L Cl 2 ).…”

Synthesis, structures and magnetic properties of octahedral Co(III) complexes of heteroaromatic hydrazones with tetraisothiocyanato Co(II) anions

“…IR spectra were recorded on a Nicolet 6700 FT-IR spectrometer using the ATR technique in the region 4000−400 cm −1 (vsvery strong, s-strong, m-medium, w-weak, bs -broad signal). 1 H and 13 C NMR spectra were recorded on Bruker Avance 500 spectrometer ( 1 H at 500 MHz; 13 C at 125 MHz) at room temperature using TMS as internal standard in DMSO-d 6 (numbering of atoms according scheme S1).…”

“…1 H NMR: 4.28 (C10-H2, s), 3.03 (C11-H9, s), 3.32 (C8-H3, s), 8.01 (C3-H, d, J 3 = 5 Hz), 7.59 (C4-H, q, J 3 = 5 Hz), 8.27 (C5-H, C6-H, d J 3 = 5 Hz) 13 C NMR: 62.4 (C10), 53.8 (C11), 16.1 (C8), 153.4 (C3), 130.3 (C4), 128.1 (C5), 142.9 (C6), 167.8 (C7), 159.9 (C2), 177.7 (C9).…”

“…There is a considerable interest in design and synthesis of Schiff bases complexes containing pseudohalide ligands due to their structural diversity, magnetic and spectral properties, as well as biological activity [1][2][3][4][5][6][7][8][9][10][11][12]. Thiocyanate is an ambidentate pseudohalide ligand, which can be coordinated through nitrogen or sulfur donor atom as monodentate or as a bridge between metal centers [13]. In some cases monodentately coordinated thiocyanate ligands can participate in intermolecular hydrogen bonding between metal complexes having significant influence on their stability in solid state [14,15].…”

Synthesis, characterization and antimicrobial activity of isothiocyanato Fe(III) Girard's t hydrazone complex

“…3 Thiocyanate is an ambidentate pseudohalide ligand, which can be coordinated through nitrogen or sulphur donor atom as monodentate or as a bridge between metal centres. 4 In some cases, monodentately coordinated thiocyanate ligands can participate in intermolecular hydrogen bonding between metal complexes, having significant influence on their stability in the solid state. 5,6 Schiff bases complexes containing pseudohalide ligands are of interest due to their structural diversity, and their magnetic and spectral properties, as well as their biological activity.…”