The interplay between pnicogen bonds and cation-π interactions has been investigated at the MP2/aug-cc-pVDZ level. Interesting cooperative and diminutive effects are observed when pnicogen bonds and cation-π interactions coexist in the same complex. These effects have been analyzed in terms of the structural, energetic, and charge-transfer properties of the complexes. The variations in electron density at critical points of the intermolecular bond have been used to analyze bond strengthening or weakening. The nature of the interactions and the mechanisms of cooperative and diminutive effects have been studied by means of symmetry-adapted perturbation theory and molecular electrostatic potentials.

The ternary systems of C(2)H(4) (C(2)H(2) or C(6)H(6))-MCN-HF (M=Cu, Ag, Au) and the respective binary systems were investigated to study the interplay between metal⋅⋅⋅π interactions and hydrogen bonds. The metal⋅⋅⋅π interactions in C(2)H(4)-MCN become stronger with the irregular order Ag

No abstract

No abstract

The first example of a facially substituted dihalogeno-nido-decaborane( 14), 5,10-B1,H,,Br,, has been obtained from the reaction of Br, with Me,SnB,,H,,; its structure has been determined by X-ray crystallography.ALTHOUGH basal-[B( 1)-B(4)I1 and monofacial-[B(5)-B( lo)] halogen substituted nido-decaboranes( 14) are known,2 the more synthetically interesting decaboranes dihalogen substituted in the facial positions were unknown until now. We have prepared and characterized the first example of such a compound, 5,10-B,,H,,Br2 (1).