Coinage Metal Complexes of Bis(quinoline-2-ylmethyl)phenylphosphine-Simple Reactions Can Lead to Unprecedented Results

Kirst, Christin; Tietze, Jonathan; Mayer, Peter; Böttcher, Hans-Christian und Karaghiosoff, Konstantin (2022): Coinage Metal Complexes of Bis(quinoline-2-ylmethyl)phenylphosphine-Simple Reactions Can Lead to Unprecedented Results. In: Chemistryopen, Bd. 11, Nr. 3

Abstract

The different coordination behavior of the flexible yet sterically demanding, hemilabile P,N ligand bis(quinoline-2-ylmethyl)phenylphosphine (bqmpp) towards selected Cu-I, Ag-I and Au-I species is described. The resulting X-ray crystal structures reveal interesting coordination geometries. With [Cu(MeCN)(4)]BF4, compound 1 [Cu-2(bqmpp)(2)](BF4)(2) is obtained, wherein the copper(I) atoms display a distorted square planar and square pyramidal geometry. The steric demand and pi-stacking of the ligand allow for a short Cu...Cu distance (2.588(9) angstrom). Cu-I complex 2 [Cu4Cl3(bqmpp)(2)]BF4 contains a rarely observed Cu4Cl3 cluster, probably enabled by dichloromethane as the chloride source. In the cluster, even shorter Cu...Cu distances (2.447(1) angstrom) are present. The reaction of Ag[SbF6] with the ligand leads to a dinuclear compound (3) in solution as confirmed by P-31{H-1} NMR spectroscopy. During crystallization, instead of the expected phosphine complex 3, a tris(quinoline-2-ylmethyl)bisphenyl-phosphine (tqmbp) compound [Ag-2(tqmbp)(2)](SbF6)(2) 4 is formed by elimination of quinaldine. The Au(I) compound [Au-2(bqmpp)(2)]PF6 (5) is prepared as expected and shows a linear arrangement of two phosphine ligands around Au-I.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Chemie und Pharmazie > Department Chemie
• Themengebiete: 500 Naturwissenschaften und Mathematik > 540 Chemie
• ISSN: 2191-1363
• Sprache: Englisch
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 491502892