
TY  - JOUR
A1  - Childs, Bradley C. 
A1  - Goodwin, Harold A. 
T1  - The Nature of the 'Mono' Ligand Complexes of Iron(II) with 1,10-Phenanthroline-2-carbothioamide and 2,2&#180;-Bipyridine-6-carbothioamide. Low-Spin Iron(II) and High-Spin Iron(III) Systems
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 2002
VL  - 54
IS  - 11
SP  - 685
EP  - 689
KW  - 
UR  - https://doi.org/10.1071/CH01147 
N2  - Interaction of 2,2&#8242;-bipyridine-6-carbothioamide (bta) with iron(II) chloride leads to three different products: &#91;Fe(bta)2&#93;Cl2&#183;H2O, &#91;Fe(bta)2&#93;&#91;FeCl4&#93; and an apparently &#8216;mono&#8217;-ligand complex analogous to the previously described Fe(pta)Cl2&#183;H2O (pta = 1,10-phenanthroline-2-carbothioamide). Electronic and M&ouml;ssbauer spectroscopic data show that all three complexes of bta contain the &#91;Fe(bta)2&#93;2+ cation. The M&ouml;ssbauer spectra, together with the magnetic properties, indicate that the &#91;Cl3Fe&#8211;O&#8211;FeCl3&#93;2&#8211; ion is associated with the cation in the &#8216;mono&#8217; complex which is formulated as &#91;Fe(bta)2&#93;2&#91;Cl3Fe&#8211;O&#8211;FeCl3&#93;Cl2&#183;3H2O. The unusual temperature dependence of the M&ouml;ssbauer spectrum, and the magnetism of this complex, arises from the presence of different iron sites, one being low-spin iron(II) and the other high-spin iron(III). Two of the latter are antiferromagnetically coupled in the oxobridged anion. 2,2&#8242;-Bipyridine-6-carboxamide (bca) yields an iron(II) mono-ligand derivative, Fe(bca)Cl2&#183;H2O, which is a simple high-spin paramagnet. 
ER  -

