Chapter 16: Structural Features of Chalcogen Bonds and Weak Interactions Involving Chalcogens
Published:15 Feb 2023
M. C. Aragoni and Y. Torubaev, in Chalcogen Chemistry: Fundamentals and Applications, ed. V. Lippolis, C. Santi, E. J. Lenardão, and A. L. Braga, The Royal Society of Chemistry, 2023, ch. 16, pp. 435-475.
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The structural features of chalcogen bonding (ChB) interactions in linear fragments R–Ch⋯Nu (Ch = S, Se, Te; R = C, N, O, S, Se, Te; Nu = N, O, S, Se, Te, F, Cl, Br, I) involving Ch⋯Nu distances shorter than the sum of relevant van der Waals (vdW) radii are reviewed. For the R–Ch⋯Nu fragments, the structural parameters dR–Ch and dCh⋯Nu are analyzed along with the values of the functions δR–Ch and δCh⋯Nu calculated by normalizing the differences between the involved covalent R–Ch and non-covalent Ch⋯Nu distances and the sum of the relevant covalent and van der Waals (vdW) radii, in order to compare the data involving different Ch atoms. A systematic comparison of the ChB found in isologue fragments R–Ch⋯Nu is presented sorted by the nature of the involved Ch atom, of the R atoms covalently bonded to the Ch, and of the Nu species playing the role of chalcogen bond acceptors.