Structural interpretation of the P-31 NMR chemical shifts in thiophosphate and phosphate: key effects due to spin-orbit and explicit solvent
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10396290" target="_blank" >RIV/00216208:11320/19:10396290 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xoGvFQxlgz" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xoGvFQxlgz</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c9cp01460h" target="_blank" >10.1039/c9cp01460h</a>
Alternative languages
Result language
angličtina
Original language name
Structural interpretation of the P-31 NMR chemical shifts in thiophosphate and phosphate: key effects due to spin-orbit and explicit solvent
Original language description
Structural interpretation of the P-31 NMR shifts measured in O,O-diethyl thiophosphate (PT), 5,5-dimethyl-2- mercapto-1,3,2-dioxaphosphorinane 2-oxide (cPT), diethylphosphate (P) and 5,5-dimethyl-2-hydroxy-1,3,2-dioxaphosphinane 2-oxide (cP) was obtained by means of theoretical calculations including the effects of geometry, molecular dynamics, and solvent, relativistic effects and the effect of NMR reference. NMR calculations employed the B3LYP, BP86, BPW91, M06-2X, PBE0, MP2, and HF methods, the Iglo-n (n = II, III), cc-pVnZ (n = D, T, Q, 5), and pcS-n (n = 0, 1, 2, 3, 4) Gaussian-type basis sets and the Slatertype QZ4P atomic basis. Water solvent was described explicitly and/or implicitly. The effects due to molecular dynamics were calculated using molecular dynamics simulations with the GAFF force field and the TIP3P water molecules, and alternatively by means of the zero-point ro-vibrational averaging. Relativistic effects included the spin-orbit calculated within the two-component zero-order relativistic approximation and the effect with the four-component DFT method. Optimal geometries and largeamplitude dynamical motions within the "opened" PT and P molecules contrasted with notably different geometries and confined dynamical motions within the cPT and cP "closed" molecules. These structuredynamical differences together with the different chemical structures of thiophosphate and phosphate due to a non-esterified sulphur or oxygen atom within the group considerably affected the magnitudes of P-31 NMR shifts. The theoretical calculations enabled accurate and reliable structure-dynamical interpretation of the measured P-31 NMR shifts. The effects due to explicit solvent and relativity turned out to be indispensable for obtaining accurate P-31 NMR shifts particularly in the thiophosphates. Replacement of the non-esterified oxygen atom in the phosphate with sulphur makes NMR shielding of the phosphorus atom qualitatively different as compared to the NMR shielding of the phosphorus atom in phosphate, H3PO4 and PH3.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Chemistry Chemical Physics
ISSN
1463-9076
e-ISSN
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Volume of the periodical
2019
Issue of the periodical within the volume
21
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
9924-9934
UT code for WoS article
000473071200027
EID of the result in the Scopus database
2-s2.0-85065988922