
TY  - JOUR
A1  - Singh, PP 
A1  - Srivastava, AK 
A1  - Khan, SA 
T1  - <I>cis</I> and <I>trans</I> Isomers of Dihalobis(2-acetylaminothiazole)nickel(II)
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1975
VL  - 28
IS  - 2
SP  - 267
EP  - 274
KW  - 
UR  - https://doi.org/10.1071/CH9750267 
N2  - The cis and trans isomers of Ni(aatz)2,X2 (X = Cl, Br, I and aatz = 2- acetylaminothiazole) have been prepared and characterized with the help of magnetic moment data and infrared and electronic spectra. The number of bands in the far infrared region (650-50 cm-1) suggests a C2h symmetry for the trans and C2v symmetry for the cis isomers. Electronic spectral bands of cis isomers have higher molar extinction coefficients and show less splitting than the trans isomers. The ligand exerts a stronger ligand field in cis than in trans isomers. The spin orbit coupling constant values (&#955;?) and the Bohr magneton values increase from chloro to iodo in the case of cis complexes and decrease in trans complexes. The X-ray powder pattern data for both the isomers are identical. 2- Acetylaminothiazole acts as a bidentate ligand and the donor sites are carbonyl oxygen and ring sulphur. 
ER  -

