2D‐Coordination Polymers Constituted from Indium Halides and Dipyridyl N‐Donor Ligands. Issue 11 (2nd May 2021) - Schäfer, Thomas C.
Abstract: Four indium‐based, 2D coordination polymers (CP) were synthesized utilizing InCl3 and InI3 and the bidentate ligands 4, 4'‐bipyridine (bipy), 1, 2‐di(4‐pyridyl)ethylene (bpe) and 1, 2‐di(4‐pyridyl)ethane (bpa). The isoreticular networks ∞ 2 [In2 Cl6 (bipy)] (1 ) and ∞ 2 [In2 Cl6 (bpe)] (2 ) are constituted by chloride‐ and ligand‐bridged octahedra with a honeycomb like (6, 3)‐net topology (hcb topology). In contrast, ∞ 2 [(In4 Cl12 )(bpa)3 ] (3 ) consists of {In4 Cl12 N6 } 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 [(InI3 )2 (bpa)3 ] (4 ), indium is coordinated by three iodide and three bpa ligands in a meridional fashion. In contrast to ∞ 2 [In2 Cl6 (bipy)] (1 ) and ∞ 2 [In2 Cl6 (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, IR‐spectroscopy, and with DTA/TG regarding their thermal properties. Abstract :