Isolation, identification, relative configuration and conformational analysis of loliolide by GIAO-HDFT 1H and 13C NMR chemical shifts calculations

FLP Costa, SBO de Fernandes, CE Fingolo… - Quantum …, 2016 - ingentaconnect.com
In this paper by combining GIAO-B3PW91/cc-pVDZ//B3PW91/cc-pVDZ chemical shifts (1H
and 13C) calculation scaling factor protocols with NMR experimental data was supported …

Carbocations

RA McClelland - … 2011: An annual survey covering the …, 2014 - Wiley Online Library
Due to the extremely weak nucleophilicity of the carborane anion, carborane acids protonate
organic compounds, providing stable carbocation salts. This chapter begins with …

Aromatic Substitution

MR Crampton - … Reaction Mechanisms· 2017: An annual survey …, 2020 - Wiley Online Library
Summary This Chapter Contains Sections titled: Introduction General Nucleophilic
Substitution The S NAr Mechanism Meisenheimer and Related Complexes Benzyne and …

Modeling of structure-property relationships of polymerizable surfactants with antimicrobial activity

G De Luca, R Amuso, A Figoli, R Mancuso… - Applied Sciences, 2018 - mdpi.com
Featured Application Some of the investigated ammonium salts were used as surfactants in
the antimicrobial coating of commercial membranes. The correlations between the structures …

Tryptanthrin (indolo [2, 1-b] quinazoline-6, 12-dione) Isolation from Leaves of Couroupita guianensis and Its Characterization by NMR Experimental and GIAO-DFT …

FLP Costa, SBO Fernandes, CE Fingolo… - Journal of …, 2017 - ingentaconnect.com
In this paper, we report the first time isolation of tryptanthrin from leaves of Couroupita
guianensis and its structural assignment by 13C NMR chemical shift calculations and …

Chemical shielding of doped nitrogen on C20 cage and bowl fullerenes

FR Nikmaram, A Khoddamzadeh - Journal of Structural Chemistry, 2017 - Springer
Abstract The C 20 (cage), C 20 (bowl), C 20 H 10 (bowl) fullerene structures and their
nitrogen doped derivatives such as C 20 NH (cage), C 20 NH (bowl), C 20 H 10 N (bowl), C …

High Cost-Effectiveness Ratio: GIAO-MPW1PW91/6-31G (d)//MPW1PW91/6-31G (d) Scaling Factor for 13C Nuclear Magnetic Resonance Chemical Shifts Calculation

F Luiz Paranhos Costa… - Journal of …, 2014 - ingentaconnect.com
In this paper, we present a GIAO-HDFT universal scaling factor and a linear regression
comparative study, in which we intent to investigate the ability of GIAO-MPW1PW91/6-31G …

High Cost-Effectiveness Ratio: GIAO-mPW1PW91/6-31 G (d)//PM7 Scaling Factor for 13C NMR Chemical Shifts Calculation

FL Paranhos Costa… - Journal of …, 2015 - ingentaconnect.com
In this paper, we present a GIAO-HDFT universal scaling factor and a linear regression
comparative study, in which we intent to investigate the ability of GIAO-mPW1PW91/6-31G …

[PDF][PDF] Theoretical Study of Hydrotreating Process in Small Heterocyclic Rings

M Hafied - Asian Journal of Chemistry, 2016 - academia.edu
A theoretical investigation has been made by use of DFT-B3lyp/cc-pvdz calculation levels, to
clarify at the atomic scale of the hydrotreating process which depends on the removal of …

Monte Carlo Simulation and GIAO-HDFT NMR Chemical Shifts Calculations for Supporting the Identification of a Natural Terpenoid

FLP Costa, SB de Oliveira Fernandes… - Quantum …, 2016 - ingentaconnect.com
In this paper by combining GIAO-B3PW91/cc-pVDZ//B3PW91/cc-pVDZ chemical shifts (1H
and 13C) calculation scaling factor protocols with NMR experimental data was supported …