
TY  - JOUR
A1  - Collin, Jean-Paul 
A1  - Gaviña, Pablo 
A1  - Sauvage, Jean-Pierre 
A1  - Cian, André De 
A1  - Fischer, Jean 
T1  - Synthesis and Structural Characterization of Copper(I) and Copper(II) Complexes with an Ambivalent Phenanthroline-Type Ligand
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1997
VL  - 50
IS  - 10
SP  - 951
EP  - 958
KW  - 
UR  - https://doi.org/10.1071/C97106 
N2  - The new phenanthroline ligand 2-(p-methoxyphenyl)-9-(5&#8242;-methylpyridin-2&#8242;-yl)-1,10-phenanthroline L has been synthesized and shown to form four-coordinate CuI(L)2 (1) and six-coordinate CuII(L)2 (2) complexes. Their structures have been determined by X-ray crystallography: (1) C50H38CuN6O2.BF4, triclinic, space group P -1, a12&#183;924(3), b 14&#183;567(4), c 12&#183;649(3) &#197; , &#945; 105&#183;57(2), &#946; 107&#183;68(2), &#947; 104&#183;00(2)&#176;; (2) C50H38CuN6O2.2PF6, monoclinic, space group P 21/c, a 17&#183;701(5), b 19&#183;285(5), c 14&#183;93(4) &#197;, &#946; 98&#183;20(2)&#176;. In solution, cyclic voltammetry measurements indicate for the copper(I) and copper(II) complexes a very fast rearrangement of the pyridine substituent with the change of the oxidation state. Surprisingly, the X-ray data show two different coordination modes for the ligand around the copper(I) ion, the 1,10-phenanthroline nucleus being either mono- or bi-dentate. In solution, since the 1H n.m.r. spectra obtained even at several temperatures display only one set of signals, it is proposed that a fast equilibrium takes place between two coordination modes of the phenanthroline 
ER  -

