2D‐Coordination Polymers Constituted from Indium Halides and Dipyridyl N‐Donor Ligands

Abstract

Dedicated to Prof. Dr. Christoph Janiak on the Occasion of his 60th Birthday Four indium-based, 2D coordination polymers (CP) were synthesized utilizing InCl 3 and InI 3 and the bidentate ligands 4,4'-bipyridine (bipy), 1,2-di(4-pyridyl)ethylene (bpe) and 1,2di(4-pyridyl)ethane (bpa). The isoreticular networks 2 1 [In 2 Cl 6 (bipy)] (1) and 2 1 [In 2 Cl 6 (bpe)] (2) are constituted by chloride-and ligand-bridged octahedra with a honeycomb like (6,3)-net topology (hcb topology). In contrast, 2 1 [(In 4 Cl 12 )(bpa) 3 ] (3) consists of {In 4 Cl 12 N 6 } units, with each indium atom being coordinated by chloride anions and bpa ligands in an octahedral fashion. Bpa ligands connect indium atoms in two dimensions, forming a semi-regular uninodal 3-c net with the point symbol (4,8 2 ), as present in the fes topology. In 2 1 [(InI 3 ) 2 (bpa) 3 ] (4), indium is coordinated by three iodide and three bpa ligands in a meridional fashion. In contrast to 2 1 [In 2 Cl 6 (bipy)] (1) and 2 1 [In 2 Cl 6 (bpe)] ( 2), the indium-centered octahedra are linked by the bidentate linker only, but also a honeycomb-like, zigzag-shaped (6,3)-net with a hcb topology is formed. The CPs were investigated by SCXRD, PXRD, IRspectroscopy, and with DTA/TG regarding their thermal properties. 2 1 [(In 4 Cl 12 )(bpa) 3 ] (3) and 21 [(InI 3 ) 2 (bpa) 3 ] (4), which were synthesized under solvothermal conditions utilizing the dipyridyle ligands 4,4'-bipyridine (bipy), 1,2-di(4-pyridyl)ethylene (bpe) and 1,2-di(4-pyridyl)ethane (bpa).

Indium Coordination Compounds Derived from Amino Amides

“…The low indium toxicity has motivated numerous research groups to synthesize coordination compounds derived from this metal for their application as contrast agents in medicine. [1] InCl 3 is a Lewis acid of medium strength that yields stable compounds in aqueous media. For this reason, these compounds and their derivatives are used as reactive compounds or catalysts in diverse chemical processes.…”