Aromatic donor-acceptor interactions in non-polar environments.

Effects of solvents polarity parameters on heterogeneous catalytic hydrogenation of cyclohexene in molecular solvents

Heterogeneous catalytic hydrogenation of cyclohexene, catalyzed by Pt/A1203, was carried out in thirteenvarious solvents (four alcoholic solvents, six aprotic polar solvents and three non polar solvents) at 25 °C.Single-parameter correlations of logk vs. normalized polarity parameter (ETN), hydrogen-bond acceptorbasicity (p), hydrogen-bond donor acidity (a) and dipolarity/polarizibility (it*) d...

Spectroscopic investigations of solvent effect on chiral interactions.

The spectrophotometric method was used to determine the mechanism of chiral interactions between a known chiral selector, tert-butyl carbamoylated quinine (t-BuCQN), and N-derivative amino acids (DNB-Leu). Results obtained on binding constants, free energy of binding (DeltaG), and difference in free energy of binding (DeltaDeltaG) values seem to suggest that there are three possible types of in...

Aromatic Donor-Acceptor Interactions: Bridging Abiotic and Peptide Folding

Significance of CH/ Interactions on the Stability of Therapeutic Proteins

A computational analysis on the CH/ interactions in a group of 49 therapeutic proteins was investigated. A total of 77 CH/ interactions were observed. The donor atom contribution to CH/ interactions was mainly from aromatic residues. Long-range CH/ interactions are the predominant type of interactions in therapeutic proteins data set. The secondary structure preference, solvent accessibility an...

Crystal structure of 1:1 donor-acceptor complex between 9,10-benzophenanthrene and 2,3,5,6-tetrafluoro-1,4-benzoquinone.

can be elucidated via molecular packing analyses of crystal structures for closely related compounds.1 2,3,5,6-Tetrafluoro1,4-benzoquinone (fluoranil) has served as a suitable acceptor for constructing donor-acceptor molecular complexes with a few polycyclic aromatic hydrocarbons (PAHs) owing to its greater electron affinity.2–4 We report herein on the crystal structure of a donor-acceptor comp...