In this work correlation dependencies between hydrogen bond energy ΔE for complexes with F–H⋯F hydrogen bond and their spectroscopic characteristics of the IR and NMR spectra are presented. We considered 26 complexes in a wide hydrogen bond energy range 0.2–47 kcal/mol. For each complex we calculated complexation energy (MP2/6-311++G(d,p)), IR spectroscopic parameters (FH stretching frequency ν FH stretching frequency in local mode approximation ν LM at MP2/6-311++G(d,p) level) and NMR parameters (chemical shift of hydrogen δ H and fluorine nuclei δ F, Nuclear Independent Chemical Shielding and spin-spin coupling constants 1J FH, 1hJ H…F, 2hJ FF at B3LYP/pcSseg-2 level). It was shown that changes of parameters upon complexation, i.e. changes of the stretching frequency in local mode approximation Δν LM, change of the proton chemical shift Δδ H and change of the absolute value of spin-spin coupling constant 1J FH could be used for estimation of corresponding hydrogen bond strength. Furthermore, we build correlation dependencies between abovementioned spectroscopic characteristics and geometric ones, such as the asymmetry of bridging proton position q 1 = 0.5·(r FH – r H…F).

Original languageEnglish
Pages (from-to)129-136
Number of pages8
JournalJournal of Molecular Structure
Volume1164
DOIs
StatePublished - 15 Jul 2018

    Research areas

  • Badger-Bauer rule, FHF complexes, Hydrogen bond energy, IR spectroscopy, NMR spectroscopy, Vibrational local mode, POLYATOMIC-MOLECULES, CHEMICAL-SHIFTS, CENTER-DOT-O, DISSOCIATION-ENERGIES, FREQUENCY-SHIFTS, DELTA(5)-3-KETOSTEROID ISOMERASE, PROTON-TRANSFER PATHWAYS, LOCAL MODE MODEL, PHOSPHORYL COMPOUNDS, LOW-TEMPERATURE NMR

    Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Inorganic Chemistry
  • Organic Chemistry

ID: 18466065