Halogen and Hydrogen Bonding in Halogenabenzene/NH₃ Complexes Compared Using Next-Generation QTAIM.

ABSTRACT: Next-generation quantum theory of atoms in molecules (QTAIM) was used to investigate the competition between hydrogen bonding and halogen bonding for the recently proposed (Y = Br, I, At)/halogenabenzene/NH₃ complex. Differences between using the SR-ZORA Hamiltonian and effective core potentials (ECPs) to account for relativistic effects with increased atomic mass demonstrated that next-generation QTAIM is a much more responsive tool than conventional QTAIM. Subtle details of the competition between halogen bonding and hydrogen bonding were observed, indicating a mixed chemical character shown in the 3-D paths constructed from the bond-path framework set B. In addition, the use of SR-ZORA reduced or entirely removed spurious features of B on the site of the halogen atoms.

SUBMITTER: Li S 

PROVIDER: S-EPMC6720212 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature