Relativistic effects in NMR properties of L[RuCPt] complexes: ZORA versus four-component calculations
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Relativistic effects in NMR properties of L[RuCPt] complexes: ZORA versus four-component calculations. / Glent-Madsen, Iben; Bendix, Jesper; Sauer, Stephan P. A.
2019. Poster session præsenteret ved Grand Challenges for Theoretical Chemistry, Helsingør, Danmark.Publikation: Konferencebidrag › Poster › Forskning
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TY - CONF
T1 - Relativistic effects in NMR properties of L[RuCPt] complexes: ZORA versus four-component calculations
AU - Glent-Madsen, Iben
AU - Bendix, Jesper
AU - Sauer, Stephan P. A.
PY - 2019/8/19
Y1 - 2019/8/19
N2 - Ruthenium-carbide complexes are of great interest due to the possible bond formation and breakage to the carbide, e.g. as a catalyst in the Fischer-Tropsch synthesis [1,2] or the natural nitrogen fixation at nitrogenase cofactors [3,4]. Hetero-metallic carbide-bridged complexes (Cy3P)2Cl2Ru≡C-PtCl2L, L[RuCPt], with various ligands L have been synthesized and characterized using NMR spectroscopy by Reinholdt and Bendix [5]. The ligands L differ in their electron donating ability and thereby their trans-influence propensity in relation to the {Ru≡C} unit in L[RuCPt].The experimental NMR studies are supplemented with theoretical studies using two relativistic methods: a four-component fully relativistic approach using the ReSpect program [6] and the Zeroth-order regular approximation (ZORA) [7] two-component method as implemented in the ADF program [8]. NMR chemical shifts of ruthenium, platinum and the carbide in various L[RuCPt] complexes were calculated at the DFT level using the PBE0 exchange-correlation functional. Basis set dependency, relativistic effects and contributions when calculating NMR properties, and a comparison of calculated results with experimental chemical shifts will be presented with focus on the results from two L[RuCPt] complexes.
AB - Ruthenium-carbide complexes are of great interest due to the possible bond formation and breakage to the carbide, e.g. as a catalyst in the Fischer-Tropsch synthesis [1,2] or the natural nitrogen fixation at nitrogenase cofactors [3,4]. Hetero-metallic carbide-bridged complexes (Cy3P)2Cl2Ru≡C-PtCl2L, L[RuCPt], with various ligands L have been synthesized and characterized using NMR spectroscopy by Reinholdt and Bendix [5]. The ligands L differ in their electron donating ability and thereby their trans-influence propensity in relation to the {Ru≡C} unit in L[RuCPt].The experimental NMR studies are supplemented with theoretical studies using two relativistic methods: a four-component fully relativistic approach using the ReSpect program [6] and the Zeroth-order regular approximation (ZORA) [7] two-component method as implemented in the ADF program [8]. NMR chemical shifts of ruthenium, platinum and the carbide in various L[RuCPt] complexes were calculated at the DFT level using the PBE0 exchange-correlation functional. Basis set dependency, relativistic effects and contributions when calculating NMR properties, and a comparison of calculated results with experimental chemical shifts will be presented with focus on the results from two L[RuCPt] complexes.
M3 - Poster
T2 - Grand Challenges for Theoretical Chemistry
Y2 - 19 August 2019 through 21 August 2019
ER -
ID: 225797846