| Autor: |
Korkmaz, Şengül Aslan, Karadağ, Ahmet, Yerli, Yusuf, Soylu, Mustafa Serkan |
| Předmět: |
|
| Zdroj: |
New Journal of Chemistry; 2014, Vol. 38 Issue 11, p5402-5410, 9p |
| Abstrakt: |
A tetradentate N- and O- donor, N,N-bis(2-hydroxyethyl)-ethylenediamine, (N-bishydeten), has been employed to synthesize four new heterometallic cyanido complexes, [Ni2(N-bishydeten)2Co(CN)6]·3H2O (C1), [Cu2(N-bishydeten)2Co(CN)6]·3H2O (C2), [Zn2(N-bishydeten)2Co(CN)6]·5H2O (C3) and K[Cd(N-bishydeten)Co(CN)6]·1.5H2O (C4). Characterization of the complexes was performed using IR and EPR spectroscopy (for C2), thermal analysis and elemental analysis techniques. The crystal structure of C2 was determined by the X-ray single crystal diffraction technique. The asymmetric unit of C2 consists of cyanido-bridged trinuclear Cu1Cu2Co3 units {-CN-Cu1(N-bishydeten)-μ-O-Cu2(N-bishydeten)-NC-Co3(CN)4-CN-} and three water molecules. The water molecules are situated in the inter-fragment spaces. The [Cu2(N-bishydeten)2]2+ cations are linked to the [Co(CN)6]3− anions via two cyanido bridges to give a 1D neutral zigzag chain. One of two N-bishydeten cations bridges five coordinated Cu1 and six coordinated Cu2 through deprotonated η1-O2 and the charge of C2 is counterbalanced by this η1-O2. The IR spectrum of C2 is quite different from other complexes, three ν(C≡N) absorption bands were observed due to different cyanido groups in its structure. The thermal decomposition of C1–C4 is processed in multistages. Variable temperature magnetic susceptibility measurement recorded in the 10–300 K range showed the presence of a strong antiferromagnetic exchange interaction in C2 between Cu1 and Cu2 by η1-O2. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
