Coordination chemistry of copper(I) complexes with bis(phosphine) ligands

How Solid Surfaces Control Stability and Interactions of Supported Cationic CuI(dppf) Complexes─A Solid-State NMR Study

“…45,46 However, we chose the system mainly because of its spectroscopic parameters, namely well observable and magnetically equivalent 31 P nuclei in the dppf ligand and (often) resolved scalar coupling with the central copper nucleus, resulting in an observable coupling constant 1 J( 63/65 Cu, 31 P). The Cu(dppf)(L x ) + motif has the advantages of being easily synthesized, relatively redox-inert (especially when coordinated by P-donor ligands), configurationally stable with low water affinity, 47 and diamagnetic, making them ideal for study by MAS NMR. 31 P MAS NMR investigations on Cu( 31 P) complexes show a typical fourfold splitting of the 31 P peaks as a result of 1 J couplings to the central Cu nucleus (I = 3/2).…”

“…Copper is widely used in catalytic applications, for example, in selective methane oxidation, − the electrochemical CO 2 reduction, , couplings, in general electron transfer reactions, − and the CO 2 -methanation reaction. , However, we chose the system mainly because of its spectroscopic parameters, namely well observable and magnetically equivalent 31 P nuclei in the dppf ligand and (often) resolved scalar coupling with the central copper nucleus, resulting in an observable coupling constant 1 J ( 63/65 Cu, 31 P). The Cu­(dppf)­(L x ) + motif has the advantages of being easily synthesized, relatively redox-inert (especially when coordinated by P-donor ligands), configurationally stable with low water affinity, and diamagnetic, making them ideal for study by MAS NMR. 31 P MAS NMR investigations on Cu­( 31 P) complexes show a typical fourfold splitting of the 31 P peaks as a result of 1 J couplings to the central Cu nucleus ( I = 3/2). − Furthermore, the complexes are usually stable under ambient conditions regarding temperature, pressure, and contact with air.…”