
TY  - JOUR
A1  - Mitchell, AJ 
A1  - Murray, KS 
A1  - Newman, PJ 
A1  - Clark, PE 
T1  - Thiohydroxamato complexes of iron(III). Synthesis, magnetism and M&#246;ssbauer spectra
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1977
VL  - 30
IS  - 11
SP  - 2439
EP  - 2453
KW  - 
UR  - https://doi.org/10.1071/CH9772439 
N2  - The syntheses of thiohydroxamic acid ligands and their iron(III) complexes are described in detail. The tris-chelates are of particular importance because of their relation to one such complex which is thought to be involved in bacterial iron-transport systems. Magnetic and spectral measurements show that the tris-chelates generally display high-spin behaviour similar to that exhibited by corresponding hydroxamato complexes. Variable temperature magnetic and Mossbauer measurements on samples of the tris(benzothiohydroxamato) derivative confirm earlier postulates of spin-crossover behaviour for this compound, with a low-spin (S 1/2 or 3/2) component at low temperatures of c. 8%. Efforts to obtain crystal structures on a tris(thiohydroxamato)iron(III) complex have been thwarted by twinning effects and by powder-like formation within well formed crystal faces. The molecular structure of these, and of the related cobalt(III) chelates, most likely contains the cis (facial) isomer.     A new series of bis-chelates, FeL2Cl, has also been prepared and physical measurements show high-spin iron(III) behaviour. 
ER  -

