1. Complex 4 crystallizes in the Triclinic, P-1 space group and it is composed of rhomboid Cu 2 I 2 dimers with two additional 8-ClQuin ligands (Figure 4a). The S values of the Cu(I) centers suggest a better fitting to a trigonal planar geometry rather than the four coordinated (S = 1.132 for trigonal planar (TP-3) and S = 3.008 for vacant trigonal bipyramid (vTBPY-4)) and define a [Cu 2 I 2 N 2 ] core, in which chlorine atom is capping one available coordination site by Cu���Cl interaction;Molecular and supramolecular structure of {
2. Copper catalysis in organic synthesis;S R Chemler;Beilstein J. Org. Chem,2015