Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 39648-67-4, Name is (R)-4-Hydroxydinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine 4-oxide, COA of Formula: C20H13O4P.
The mechanism for chiral recognition of 1,1′-binaphthyl-2,2′-diyl hydrogen phosphate (BNP) and 1,1′-binaphthyl-2,2′-dicarboxylic acid (BNC) by beta-cyclodextrin (beta-CDx) and heptakis(2,3,6-tri-O-methyl)-betaCDx (TMe-beta-CDx) has been investigated by 1H NMR spectroscopy, thermodynamic parameters for complexation and molecular mechanics-molecular dynamics (MM-MD) calculations.TMe-beta-CDx recognizes axial chiralities of the BNP anion and undissociated BNC, (S)-BNP and (R)-BNC being the preferable guest enantiomers.The ability of beta-CDx to recognize the axial chiralities is inferior to that of TMe-beta-CDx. 1H NMR spectra suggest that (S)-BNP is shallowly bound to the wider side of the TMe-beta-CDx cavity where a hydrophilic phosphate group is located inside the hydrophobic CDx cavity.Meanwhile, (R)-BNP seems to form the complex of TMe-beta-CDx where the C2 symmetry axis of (R)-BNP is perpendicular to the C7 symmetry axis of TMe-beta-CDx.The complexation of the preferable enantiomer of the guest with TMe-beta-CDx is entropically favourable while that of the undesirable enantiomer of the guest is entropically unfavourable.The MM-MD calculations suggest that the orientation of the preferable guest is determined by the dipole-dipole interactions between the host and the guest.Similar orientation in the cases of the undesirable enantiomers may be prevented by steric factors.The positive entropy changes in the complexation of (S)-BNP and (R)-BNC seem to be ascribed to the extended dehydration from both the hydrophilic groups of the guest and the ethereal oxygen atoms of the wider side of the TMe-beta-CDx cavity upon inclusion.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.COA of Formula: C20H13O4P. In my other articles, you can also check out more blogs about 39648-67-4