Initially, in order to determine optimal polymerization reaction conditions, the influences of catalyst quantity, Lewis base
quantity, and monomer concentration on the inherent viscosity of the polymer were examined by the Friedel-Crafts acylation of IPC with a mixture of 70 mol% BPOBBP and 30 mol% DPODPS in DCE using anhydrous aluminum chloride as a catalyst and NMP as a Lewis base
and the results are listed in Table 1.
Their frustrated pair comprised of the Lewis base
tetramethylpiperidine or TMP and the Lewis acid tris(pentafluorophenyl)borane.
Calculated complexation energies ([DELTA]H, in kJ/mol) of the studied Lewis bases
Polar modifiers comprised of Lewis bases
are most often employed to control the level of vinyl structures formed during lithium-based anionic polymerization in non-polar solvents.
Furthermore, zirconia has a high affinity for hard Lewis bases
, which allows for complexation of the surface to produce a bio-compatible stationary phase useful for bio-molecule separation and purification.
The Perrault of the Carrousel of 1662, as well as the one at the heart of the debate between the Anciens and the Modernes is what Lewis bases
his study on at the beginning of his work.
her assertion on the results of an ongoing study of violent juvenile delinquents, as well as on previous research with young men on death row (SN: 10/31/87, p.