|
|
Coordination properties of a 2-(diphenylphosphino)guanidine ligand
Leitner, Zdeněk ; Štěpnička, Petr (advisor) ; Lamač, Martin (referee)
Title: Coordination properties of phosphinoguanidine ligand Author: Bc. Zdeněk Leitner Institution: Faculty of Science, Charles University in Prague, Department of Inorfanic Chemistry Supervisor: prof. RNDr. Petr Štěpnička, Ph.D., DSc. Polar phosphine ligands have found use in variety of homogenous and biphasic catalytic processes. In the past, extensive research has been performed also on cationic phosphines, namely phosphinoguanidinium salts. However, neutral phosphinoguanidines have been mostly neglected and their coordination chemistry has not been described to a satisfactory extent, even though the combination of soft phosphorous and harder nitrogen Lewis base could exhibit interesting properties, mainly hemilabile coordination, as well as protonation-controlled nitrogen coordination. These properties could have a positive impact on catalytical performance of this ligand in systems, which benefit from hydrogen bonding or the presence of basic guanidine group. The aim of this work was to study coordination properties of an earlier prepared ligand L and the corresponding phosphinoguanidine salt L·HCl in reactions with Group 11 metal precursors. New compounds were characterized, and their crystal structures were determined. In addition to conventional compounds, an uncommon dimeric complex...
|
guest ::
