Application In Synthesis of Bis((S)-4-phenyl-4,5-dihydrooxazol-2-yl)methane. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Bis((S)-4-phenyl-4,5-dihydrooxazol-2-yl)methane, is researched, Molecular C19H18N2O2, CAS is 132098-59-0, about Energy-resolved collision-induced dissociation cross sections of 2:1 bis-oxazoline copper complexes: nonbonded interactions and nonlinear effects. Author is Zocher, Eva; Dietiker, Rolf; Chen, Peter.
Absolute ligand binding energies are determined for the 2:1 complexes of bis-oxazoline ligands and Cu(I) in the gas phase by the fitting of energy-resolved collision-induced dissociation cross sections. The complexes were chosen for their occurrence in asym. catalysis for which the phenomenon of nonlinear effects is explained by differences in stability for homochiral and hetero-chiral complexes. Pseudo-enantiomeric ligands are used so that mass spectrometric measurements can be employed. The measurements find that the sterically similar, but electronically different, iso-Pr vs. Ph substituents lead to a different stability ordering of the homo- vs. hetero-chiral complexes, which then leads to the prediction of nonlinear effects in asym. catalysis by the complexes with isopropyl-substituted ligands. The origin of the difference in stability order is found in noncovalent interactions between the Ph groups on the ligands, which are poorly described by DFT calculations
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