(2,9-Dimethyl-1,10-phenanthroline-κ²N,N′)diiodidocadmium

Abstract

In the title compound, [CdI2(C14H12N2)], the mol­ecule sits on a crystallographic twofold axis. The coordination sphere of the CdII atom is built of two symmetry-equivalent N atoms of one 2,9-dimethyl-1,10-phenanthroline (dmphen) ligand and two symmetry-equivalent I atoms, thus forming a distorted tetra­hedral geometry. Inversion-related mol­ecules inter­act along the c-axis direction by π–π stacking inter­actions between the phenanthroline ring systems, with centroid–centroid distances of 3.707 (9) and 3.597 (10) Å.

Synthesis, spectral, electrochemical, crystal structure studies of two novel di-μ-halo-bis[halo(2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline)cadmium(II)] dimer complexes and their thermolysis to nanometal oxides

“…Previously, a series of several mixed-ligand mononuclear and dinuclear metal complexes have a general formula MX 2 (dmphen) were prepared in our lab [13][14][15][16]. These complexes were found to be suitable precursors for spherical shape metal oxide nanoparticles [15].…”

“…1,10-Phenanthroline as a versatile ligand was able to chelate Cadmium(II) to give mono-phen or bis-phen complexes [13][14][15][16]. Cadmium complexes have attracted more and more attentions because of their widely reported bioactivities, such as DNA binding affinity [17] and antibacterial activities [18].…”

Dibromido(2,9-dimethyl-1,10-phenanthroline-κ2N,N′)cadmium

“…Geometrical analysis of the bond lengths and angles around the cadmium atom shows that the CdBr 2 N 2 tetrahedron, where the Cd shift from the gravity center is δ = 0.249 Å, is less distorted that the CdI 2 N 2 (δ = 0.356 Å) in the [CdI 2 (dmphen)] structure (Warad et al, 2011). This can be explaned by the large size and π-acid character of the iodine atom.…”

“…For related structures, see: Preston & Kennard (1969); Lange et al (2000); Alizadeh et al (2009); Wang & Zhong (2009); Warad et al (2011). For background tostacking interactions, see: Janiak (2000).…”

“…This complex was prepared by a procedure similar to that used for [CdI 2 (dmphen)] (Warad et al, 2011). A mixture of cadimium bromide (CdBr 2 .4H 2 O, 82.7 mg, 0.24 mmol) in methanol (20 ml) and dmphen (50.0 mg, 0.24 mmol) in dichloromethane (10 ml) is stirred for 2H at room temperature.…”