Corrigendum to “Raman studies of nanocomposites catalysts: temperature and pressure effects of CeAl, CeMn and NiAl oxides” [Spectrochim. Acta A Mol. Biomol. Spectrosc. 198 (2018) 160–167]

The definitive challenge of forming uncommon pseudo‐π···H–F and C···H–F hydrogen bonds on cyclic and cubic nonpolar hydrocarbons

“…Our results show that the hydrogen bond formed in the cyclopropane reproduces exactly the well‐known profile of pseudo‐π···H. [ 19,22,23,37 ] In the complex of prismane, the hydrogen bond should be preferably formed in one of the two three‐member faces because these small rings are highly strained and contain the higher electronic concentration for interacting with hydrogen fluoride. In cyclobutane, even though it may be cogitated that the hydrogen bond occurs precisely on the carbon atom, which is a proton acceptor, on the structural viewpoint, the interaction is aligned exactly in the middle of the carbon‐carbon bond.…”

“…In addition to the I complex, maybe III might be formed by the pseudo‐π···H hydrogen bond, and in opposition to this, in the II and IV complexes may be considered the contact of the hydrogen fluoride towards the carbon atom to form the C···H interaction. [ 22,23,111 ] The interaction occurring in the cubane refers to the projection IV′ , wherein the coordinate for measuring the intermolecular distance of 2.5025 Å is the central point of the four‐member face. Differently of a pseudo‐π bond or even if the aromaticity is taken into account, [ 125 ] but the more resembled interactions with all that has been demonstrated for the “cubane‐hydrogen fluoride” complex could be those ones in T‐shaped intermolecular systems formed by benzene as proton acceptor with the π···H hydrogen bond aligned precisely in the central point of the aromatic‐ring.…”

“…Sure, these are the foundations of the quantum theory of atoms in molecules (QTAIM), [ 95 ] which has been used in routine studies of intermolecular systems, mainly those weakly bound ones. [ 96–99 ] Historically, the F···H, O···H, and N···H hydrogen bonds [ 22,23,35,100 ] with energies of 30 KJ.mol −1 as well as the π···H and pseudo‐π···H as the weaker ones, all of them have been characterized on the basis of the QTAIM formalism. The modeling of the hydrogen bonds in the C 3 H 6 , C 4 H 8 , C 6 H 6 , and C 8 H 8 alkanes summarizes the cornerstone of this current work if, specially, beyond an atom, a chemical bond, or even a triangular or square faces of the rings, can function as nucleophiles to interact with hydrogen donors.…”

“…[ 8 ] The historical background of the hydrogen bond reveals a notorious relevance in research studies of strongly bound systems, [ 9 ] and adversely, it is important to underline that the weakly bound has been not investigated as truly deserve by the fact of experimental techniques [ 10,11 ] for structural characterization as well as theoretical methods [ 12 ] specifically implemented for computational calculations, both might be not sufficiently accurate for studying these types of system. [ 13 ] Regardless, the capability of the hydrocarbons to form intermolecular interaction must be increasingly explored, although this theme has been discussed in studies published along the last decade, [ 14–22 ] by which the existence of hydrogen bonds with properties never seen before has been revealed. [ 23,24 ] In a brief comment, it should be emphasized that the hydrogen bond model framed as Y···H–X is universal, [ 25–29 ] even so some restrictions must be considered on the basis of elementary criteria; eg, the electronegativity values of Y and X should be higher in comparison to the hydrogen.…”

“…[ 55 ] These cyclic and cubic alkanes represent a high‐level challenge in the field of intermolecular interactions formed with standard molecular acids. [ 56 ] By assuming that C 3 H 6 and C 4 H 8 can be suitable structures to form hydrogen bonds, such as the pseudo‐π···H–X [ 37 ] instead of the π···H–X type, [ 22,23 ] and in this insight, the great goal of this current research is definitively established.…”