Department of Chemistry
Interaction of In(I) and Tl(I) cations with 2,6-diaryl pyridine ligands: Cation encapsulation within a very weakly interacting N/Arene host environment
The interaction of 2,6-dimesitylpyridine with Tl(I) and In(I) cations has been investigated with a view to developing tractable molecular M(I) compounds which are soluble in organic media. In stark contrast to isosteric and isoelectronic terphenyl systems, complexes featuring the [(2,6-Mes 2py)M]+ fragment feature very weak metal-ligand interactions in the solid state, as revealed by M-N distances of the order of 2.45 Å (M = In) and 2.64 Å (M = Tl). While additional weak φ interactions are observed with arene solvate molecules in these systems, the related 2:1 complex [(2,6-Mes2py)2In][BArf 4] features an In(I) center wholly encapsulated by the bulky Mes 2py donors, and even longer In-N distances [2.586(6) and 2.662(5) Å]. These contacts are about 0.5 Å greater than the sum of the respective covalent radii (2.13 Å) and provide evidence for an effectively "naked" In(I) cation stabilized to a minor extent by orbital interactions. © 2012 American Chemical Society.
Source Publication Title
American Chemical Society
Mansaray, Hassanatu B., Christina Y. Tang, Dragoslav Vidovic, Amber L. Thompson, and Simon Aldridge. "Interaction of In(I) and Tl(I) cations with 2,6-diaryl pyridine ligands: Cation encapsulation within a very weakly interacting N/Arene host environment." Inorganic Chemistry 51.23 (2012): 13017-13022.