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Journal | Dalton Transactions |
---|---|
Date | Accepted/In press - 11 Sep 2017 |
Date | E-pub ahead of print - 12 Sep 2017 |
Date | Published (current) - 2017 |
Issue number | 40 |
Volume | 46 |
Number of pages | 6 |
Pages (from-to) | 13714-13719 |
Early online date | 12/09/17 |
Original language | English |
We have prepared nido-7,8,9,11-Sb2C2B7H9, the first cluster with simultaneous Sb-B, Sb-C and Sb-Sb atom pairs with interatomic separations with magnitudes that approach the respective sums of covalent radii. However, the length of the Sb-Sb separation in this cluster is slightly less than the sum of the covalent radii. Quantum chemical analysis has revealed that the crystal packing of nido-7,8,9,11-Sb2C2B7H9 is predominantly dictated by pnictogen (Pn) bonding, an unconventional σ-hole interaction. Indeed, the interaction energy of a very strong Sb2⋯H-B Pn-bond in the nido-7,8,9,11-Sb2C2B7H9 dimer exceeds -6.0 kcal mol-1. This is a very large value and is comparable to the strengths of known Pn-bonds in Cl3Pn⋯π complexes (Pn = As, Sb).
© The Royal Society of Chemistry 2017
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