Synthesis, spectral characterization, properties and structures of copper(I) complexes containing novel bidentate iminopyridine ligands

Copper(I) complexes with Schiff base and 1,2-bis(diphenylphosphino)ethane as ligands: Synthesis, structure and catalytic properties for the amination of aryl halide

“…However, the N(1)-Cu(1)-P(2), N(2)-Cu(1)-P(2), N(1)-Cu(1)-P(1) and P(2)-Cu(1)-P(1) angles are 121.64(5)°, 125.39(5)°, 120.63(5)°and 121.37(5)°, respectively are much larger than those of a tetrahedral complex. The average Cu-N bond distance (2.0632 Å) is comparable to those reported for [Cu(A)(PPh 3 ) 2 ]ClO 4 pseudo-tetrahedral complexes [28]. All of the Cu-P bond lengths are as one would expect, i.e.…”

Mixed-ligand complexes of copper(I) with Schiff base and triphenylphosphine: Effective catalysts for the amination of aryl halide

“…However, the P(1)\Cu(2)\P(2) angle 115.37(7)°in I and the P(3)\Cu(2)\P(4) angle 118.90(8)°in II, have opened up due to the steric effects from the bulky PPh 3 ligands. The average Cu\N (2.052 Å) and Cu\P (2.251 Å) bond distances are comparable to those reported for [Cu(A)(PPh 3 ) 2 ]ClO 4 (2.098 and 2.251 Å)[30].…”

Synthesis and characterization of [Cu(mb2en)2]ClO4 and [Cu(mb2en)(PPh3)2]BPh4: crystal structure of [Cu(mb2en)2]ClO4

“…This band shifts to lower frequencies in the IR spectra of the corresponding complexes due to coordination of the imine nitrogen [20], at 1580 cm À1 in 1 and 1585 cm À1 in 2.…”