The HF adduct of the ambiphilic phosphineâborane [o-iPr2P(C6H4)BMes2] has been spectroscopically characterized and the nature of the interaction between the ensuing hydrogenophosphonium and fluoroborate moieties has been analyzed computationally.
Dimerization of Ethylene by Nickel Phosphino–Borate Complexes
作者:Dmitry V. Gutsulyak、Andrew L. Gott、Warren E. Piers、Masood Parvez
DOI:10.1021/om400288u
日期:2013.6.10
Trifluoroborate-functionalized phosphine ligands react with a variety of nickel(II) precursors to cleanly yield a number of kappa(2)(P,F)-bound nickel complexes, which were characterized crystallographically. In comparison to related palladium complexes, ancillary ligands in the nickel complexes were observed to be generally more weakly bound, and the trifluoroborate ligands were more easily displaced by coordinating solvents that did not cause a similar displacement in a related palladium system. Such weaker ligand coordination resulted in a much faster dimerization of ethylene. Experiments conducted under constant ethylene pressure saw the suppression of the isomerization of 1-butene observed in related palladium complexes; higher oligomers were also generated under such conditions.
Dimerization of Ethylene by Palladium Complexes Containing Bidentate Trifluoroborate-Functionalized Phosphine Ligands
作者:Andrew L. Gott、Warren E. Piers、Jason L. Dutton、Robert McDonald、Masood Parvez
DOI:10.1021/om2004095
日期:2011.8.22
yielding facileaccess to complexes of the general type [κ2-(P,F)RPdMe(lutidine)]. Investigations into the insertion chemistry of the palladium methylmoiety with simple small molecules revealed that the release of the lutidine ligand is slow and that insertion of ethylene occurs in a very slow manner; this is attributed to the relative electron deficiency of the aryltrifluoroborate moiety as compared