The stability of the LinBnH2n (n = 3–6) series was analyzed using quantum chemical calculations, and it was found that cyclic isomers are not energetically favored. This is different to what happens in their organic counterparts (CnH2n), where cyclopentane (C5H10) and cyclohexane (C6H12) are the low-lying isomers. Apparently, aromaticity is a key-stabilizing factor that needs to be considered for designing stable lithium-boron hydride analogues of cyclic organic compounds. This is verified in the Li3B3H3+ system, which has been designed as the smallest aromatic carbocation (C3H3+) analogue. The global minimum structure of Li3B3H3+ contains a triangular B3H32− moiety, which has structural and chemical bonding features similar to its organic counterpart. Besides, this new cluster is classified as aromatic according to both the 4n + 2 Hückel rule and the analysis of the induced magneti...

En este artículo, brindamos evidencia sólida para demostrar que, entre una diversidad estructural abrumadora, los metales alcalinotérreos (Ca, Sr, Ba) tienen la capacidad de formar compuestos sándwich invertidos con C6H6, C7H7+ y C8H82+ de simetría Dnh y fórmula general [E –(CnHn)–E]n−6 (n = 6–8) con núcleos aromáticos planares de 10 π electrones en virtud de la transferencia de dos electrones por átomo de metal al anillo.

It evaluated the behavior of the Re3(μ-Cl)3Cl6 cluster under magnetic perturbation, and it clearly shows that the magnetic response within the Re3(μ-Cl)3 plane is highly diatropic in nature. An analysis of both the magnetically induced current density (MICD) and induced magnetic field (Bind) allows us to classify this cluster as doubly σ- and also π-aromatic on the magnetic criterion. These findings contradict the classical Re–Re double bond representation and favor a chemical bonding pattern that involves delocalized bonds.