Non-covalent bonds in group 1 and group 2 elements: the ‘alkalene bond’

Abstract

The non-covalent bonds formed by group 1 and group 2 elements, were systematically analysed by ab-initio calculations at MP2/aug-cc-pVDZ level of theory to classify the weak bonds, followed by Atoms...

Unified classification of non-covalent bonds formed by main group elements: a bridge to chemical bonding

“…11,54,61 Intramolecular hydrogen bonding presents a challenge to most experimental and theoretical methods, and binding energy-electron density correlation is not an exception as discussed by Jabłoński and Monaco. 62 However, a similar slope from binding energy and electron density was inferred as a similar bonding mechanism involved in non-covalently bonded complexes 44,63 and diatomic molecules. 60 In this perspective, we examined all non-covalent bonds formed by main group elements (except group 18) across the periodic table using the plot of binding energy versus electron density.…”

“…The similar slope of Li, Na, Be, Mg, and Ca-bonded complexes led us to propose the common name alkalene bond in our recent article. 44…”

“…The donors taken for the rest of the groups are F 3 X, FH 2 X and ClH 2 X (X = P, As, Sb and Bi). The slopes for P, As, Sb, and Bi are 865 (46), 872 (44), 1271 (54), and 1546 (92), with correlation coefficients of 0.93, 0.93, 0.95, and 0.91, respectively.…”

“…Recently, we have proposed a common name for group 1 (except hydrogen) and group 2 elements as alkalene bonds. 44 The hydrogen bond is distinct from the rest of its congeners. The uniqueness and versatility of hydrogen bonds have motivated the International Union of Pure and Applied Chemistry (IUPAC) to redefine the hydrogen bond comprehensively in 2011.…”

“…Recently, we have proposed a common name for group 1 (except hydrogen) and group 2 elements as alkalene bonds. 44…”