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Use of Thio and Seleno Germanones as Ligands: Silver(I) Halide Complexes with GeE→Ag–I (E = S, Se) Moieties and Chalcogen-Dependent Argentophilic Interaction

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journal contribution
posted on 06.10.2014, 00:00 by Dhirendra Yadav, Rahul Kumar Siwatch, Goutam Mukherjee, Gopalan Rajaraman, Selvarajan Nagendran
The potential of thio and seleno germanones [LPhGeE] (L = aminotroponiminate (ATI) ligand, E = S 3, Se 4) to function as ligands has been demonstrated through the isolation of their silver­(I) iodide complexes [{(t-Bu)2ATIGe­(E)­Ph}2(Ag2I2)] (E = S 5, Se 6) with a planar and discrete Ag2I2 core. Compounds 5 and 6 possess the hitherto unknown GeE→Ag–I moieties and the crystallographic data reveals the presence of a strong argentophilic interaction (2.950(1) Å) in complex 6, but is inconclusive in complex 5 (3.470(1) Å). Using theoretical studies, proof for the presence and absence of argentophilic interactions in complexes 6 and 5 was obtained, respectively. Further, it is disclosed that the donor ability of the chalcogen atoms in the GeE→Ag–I moieties dictate the Ag···Ag interaction in these complexes.