2‐Amino‐5‐(2‐pyridyl)‐thiadiazole as Bidentate Ligand

Abstract

Abstract. The amino substituted bidentate chelating ligand 2-amino-5-(2-pyridyl)-1,3,4-thiadiazole (H 2 L) was used to prepare 3:1-type coordination compounds of iron(II), cobalt(II) and nickel(II

A Simple Approach for Predicting the Spin State of Homoleptic Fe(II) Tris-diimine Complexes

“…As a result, [Fe (16) 3 ] 2+ exhibits SCO 46,47 while [Fe (20) 3 ] 2+ exists only in the LS state. 54 Ligands with Two Five-Member Rings. Diimine ligands formed by two five-member rings show even larger N−N separations, in some cases close to 3.0 Å (Table 1).…”

“…The introduction of the larger S atom effectively decreases the bond angle (α or β in Scheme ) at the chelating N-donor site of the five-member ring, from 127.5° in 16 to 123.3° in 20 , pushing it closer to the N-donor site on the six-member ring and favoring the LS state over the HS state in the Fe­(II) complex. As a result, [Fe­( 16 ) 3 ] 2+ exhibits SCO , while [Fe­( 20 ) 3 ] 2+ exists only in the LS state …”

Synthesis, crystal structure and Hirshfeld surface analysis of bromidotetrakis[5-(prop-2-en-1-ylsulfanyl)-1,3,4-thiadiazol-2-amine-κN 3]copper(II) bromide

“…1,3,4-Thiadiazole derivatives exhibit many biological properties, such as antimicrobial (Li et al, 2014;Chen et al, 2019), antituberculosis (Foroumadi et al, 2004;Kolavi et al, 2006), antioxidant (Jakovljevic ´et al, 2017;Swapna et al, 2013), anticancer (Altıntop et al, 2018;Aliabadi, 2016), herbicidal (Wang et al, 2011) and antifungal (Chen et al, 2007;Karaburun et al, 2018) activities. In addition, a limited number of studies mention the utilization of diverse thiadiazoles as ligands in the synthesis of biologically active metal complexes (Huxel et al, 2015;Chandra et al, 2015;Hangan et al, 2015).…”