In:
European Journal of Inorganic Chemistry, Wiley, Vol. 2013, No. 27 ( 2013-09-10), p. 4799-4811
Abstract:
The synthesis and characterization of mononuclear [Cu(L) 2 (Cl) 2 ] ( 1 ), dinuclear [{CuCl(L)} 2 (μ‐Cl) 2 ] ( 2 ), and another mononuclear complex [Cu(L) 2 (ClO 4 ) 2 ] ( 3 ) with a bidentate N , N ‐diisopropylpicolinamide ligand (abbreviated L) are described. Complexes 1 and 2 were obtained from the same reaction mixture and show thermo‐ and solvatochromic behavior. Complex 1 shows irreversible thermochromism by changing into 2 upon heating at 160 °C. These two complexes also show solvatochromism in various solvents. The coordination geometry of the metal ions in 1 and 3 is distorted octahedral, whereas 2 has Cu II ions in a distorted square‐pyramidal geometry. Variable‐temperature magnetic susceptibility measurements for the dinuclear copper complex show a ferromagnetic interaction between the Cu II ions. The chromotropism has been attributed to a change in geometry from octahedral with terminal chloride ligands to a distorted square‐pyramidal coordination with bridging chloride ions.
Type of Medium:
Online Resource
ISSN:
1434-1948
,
1099-0682
DOI:
10.1002/ejic.v2013.27
DOI:
10.1002/ejic.201300548
Language:
English
Publisher:
Wiley
Publication Date:
2013
detail.hit.zdb_id:
1475009-0
Permalink