Dotta, Pascal published the artcileDialkyl Effect on Enantioselectivity: π-Stacking as a Structural Feature in P,N Complexes of Palladium(II), Category: esters-buliding-blocks, the publication is Organometallics (2002), 21(14), 3033-3041, database is CAplus.
A phosphino,oxazoline P,N-bidentate ligand, 4, containing 3,5-di-tert-butylphenyl groups was prepared In the Heck arylation of dihydrofuran, 4 affords higher ee’s than either 2 or 3, the unsubstituted and m-dimethylphenyl analogs, resp. Several Pd(0) complexes of 4 are reported. The exchange dynamics of Pd(4)(dba) involve an interconversion of diastereomers via an intramol. process. The x-ray structure for PdCl2(4), 8, was determined by x-ray diffraction methods. Comparison of data with PdCl2(2), 9, and PdCl2(3), 10, suggests that differing amounts of π-π stacking influence the structures of these relatively simple Pd complexes, with 9 and 10 revealing the strongest π-π interactions. An estimation of the van der Waals energies involved in the interaction supports a ∼ 4 kcal/mol stabilization via π-π stacking.
Organometallics published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C22H12F6O6S2, Category: esters-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics