The reaction of chlorides and acetates of FeII, NiII, CuII and ZnII with the polydentate ligand cyclohexane-1,2-dione bis(thiosemicarbazone) (H2L) led to the formation of some novel complexes which have been characterized by spectroscopic methods (NMR, IR). The crystal structures of the two compounds [ZnL(OH2)]·dmf (dmf = dimethylformamide) 1 and [Zn(H2L)Cl]Cl·2H2O 2 have been determined. In both complexes the co-ordination geometry about zinc is distorted square-planar pyramidal. The axial sites are occupied by a water molecule in 1 or by a chlorine atom in 2. The ligand is dideprotonated in 1 and neutral in 2, so that in 1 a higher π-delocalization is observed.
Transition-metal complexes of cyclohexane-1,2-dione bis(thiosemicarbazone) (H2L). Crystal structures of [ZnL(OH2)]·dmf (dmf = dimethylformamide) and [Zn(H2L)Cl]Cl·2H2O / Rodríguez Argüelles, Maria C; Battaglia, Luigi Pietro; Ferrari, Marisa Belicchi; Fava, Giovanna Gasparri; Pelizzi, Corrado; Pelosi, Giorgio. - In: JOURNAL OF THE CHEMICAL SOCIETY DALTON TRANSACTIONS. - ISSN 0300-9246. - 13(1995), pp. 2297-2303. [10.1039/DT9950002297]
Transition-metal complexes of cyclohexane-1,2-dione bis(thiosemicarbazone) (H2L). Crystal structures of [ZnL(OH2)]·dmf (dmf = dimethylformamide) and [Zn(H2L)Cl]Cl·2H2O
PELOSI, Giorgio
1995-01-01
Abstract
The reaction of chlorides and acetates of FeII, NiII, CuII and ZnII with the polydentate ligand cyclohexane-1,2-dione bis(thiosemicarbazone) (H2L) led to the formation of some novel complexes which have been characterized by spectroscopic methods (NMR, IR). The crystal structures of the two compounds [ZnL(OH2)]·dmf (dmf = dimethylformamide) 1 and [Zn(H2L)Cl]Cl·2H2O 2 have been determined. In both complexes the co-ordination geometry about zinc is distorted square-planar pyramidal. The axial sites are occupied by a water molecule in 1 or by a chlorine atom in 2. The ligand is dideprotonated in 1 and neutral in 2, so that in 1 a higher π-delocalization is observed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
