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Computational NMR Spectra of o-Benzyne and Stable Guests and Their Hemicarceplexes
- Source :
- © Chemistry-A European Journal, 2019, vol.undef, núm undef, p. undef, Articles publicats (D-Q), DUGiDocs – Universitat de Girona, instname
- Publication Year :
- 2019
-
Abstract
- The incarceration of o‐benzyne and 27 other guest molecules within hemicarcerand 1, as reported experimentally by Warmuth, and Cram and co‐workers, respectively, has been studied by density functional theory (DFT). 1H‐NMR chemical shifts, rotational mobility and conformational preference of the guests within the supramolecular cage were determined, which showed intriguing correlations of the chemical shifts with structural parameters of the host‐guest system. Furthermore, based on the computed chemical shifts reassignments of some NMR signals are proposed. This affects in particular the putative characterization of the volatile benzyne molecule inside a hemicarcerand, for which our CCSD(T) and KT2 results indicate that the experimentally observed signals are most likely not resulting from an isolated benzyne within the supramolecular host. Instead, we show that the guest reacted with an aromatic ring of the host, and this adduct is responsible for the experimentally observed signals The following organizations are thanked for financial support: MICINN (PhD-scholarship ACC CTQ2011-25086/BQU, projects CTQ2014-59212-P, CTQ2015-70851-ERC, CTQ2017-87392-P), CONACyT project 2014-383560, GenCat (PhD scholarship ARR 2015_FI_B_00165, 2014SGR1202 and XRQTC network) and European Fund for Regional Development (FEDER, UNGI10-4E-801)
- Subjects :
- Funcional de densitat, Teoria del
010405 organic chemistry
Chemistry
Chemical shift
Organic Chemistry
Blindatge (Radiació)
Supramolecular chemistry
macromolecular substances
General Chemistry
Espectroscòpia de ressonància magnètica nuclear
010402 general chemistry
Ring (chemistry)
01 natural sciences
Aryne
Catalysis
0104 chemical sciences
Adduct
NMR spectra database
Crystallography
Shielding (Radiation)
Molecule
Density functional theory
Nuclear magnetic resonance spectroscopy
Density functionals
Subjects
Details
- ISSN :
- 15213765
- Volume :
- 26
- Issue :
- 12
- Database :
- OpenAIRE
- Journal :
- Chemistry (Weinheim an der Bergstrasse, Germany)
- Accession number :
- edsair.doi.dedup.....e24c432b75bee345e31d6532c185bafa