Hydrothermal synthesis, crystal structures and properties of Tiron-bridged di- and trinuclear strontium complexes containing nitrogen-donor ligands

Synthesis, structure and the Hirshfeld surface analysis of three novel metal-tiron coordination complexes

“…The ligand tiron is preferred in chelating and bridging ligation due to the following typical points (1) the tiron ligand encompassing two sulfonate and two phenol (catechol) functional groups have been less known; (2) the coordination reaction between the metal ions and tiron ligand can straightforwardly help in the formation of novel structures and topology; and (3) the sulfonate group settled at the ortho, meta and para positions of a benzene ring with respect to the phenol group and can display various coordination modes of ligands via their prospective oxygen donors. [23][24][25] Our aim is to check the consequence of the crystal structures and their fascinating properties of metal coordination polymers by varying different metal ions with sulfonate-phenol-based tiron ligands and 4,4 0 -bipyridyl (bpy) ligands. Herein, we present a mixed-linker approach to synthesize metal-sulfonatephenol-centered coordination polymers possessing a tiron-bpy adduct ligand with a zig-zag structure.…”

Structural Diversity of Calcium, Strontium, and Barium Complexes with Reduced Forms of the 3,6‐Di‐tert‐butyl‐o‐benzoquinone Ligand

“…Formation of semiquinolate complexes of Ca, Sr, and Ba with 3,5‐di‐ tert ‐butyl‐1,2‐benzosemiquinolate (3,5‐SQ) ligands was studied by solution EPR, but to date the structural information on the dioxolene complexes with these metals is almost absent . Several known exceptions include strontium complexes [(SrPhen(H 2 O) n ) 2 (µ‐Tiron) 2 ] 2– (Phen = 1,10‐phenanthroline; n = 1, 2), where both catecholate and sulfonate groups coordinate the cations . Similar type of coordination is found in Sr complexes of 3‐carboxylated catechol (2,3‐dihydroxybenzoic acid) .…”