Coordination isomers of biological iron transport compounds. 8. The resolution of tris(hydroxamato) and tris(thiohydroxamato) complexes of high-spin iron(III)

1977 ◽  
Vol 99 (6) ◽  
pp. 2003-2005 ◽  
Author(s):  
Kamal Abu-Dari ◽  
Kenneth N. Raymond
Keyword(s):  
High Spin ◽  
Iron Transport ◽  
Coordination Isomers ◽  
High Spin Iron

Thiohydroxamato complexes of iron(III). Synthesis, magnetism and Mössbauer spectra

1977 ◽  
Vol 30 (11) ◽  
pp. 2439 ◽  
Author(s):  
AJ Mitchell ◽  
KS Murray ◽  
PJ Newman ◽  
PE Clark
Keyword(s):  
High Spin ◽  
Low Temperatures ◽  
Iron Transport ◽  
Spin Crossover ◽  
Variable Temperature ◽  
Transport Systems ◽  
Spectral Measurements ◽  
Physical Measurements ◽  
Mössbauer Measurements ◽  
High Spin Iron

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.

Synthetic, Structural, and Spectroscopic Characterization of a Novel Family of High-Spin Iron(II) [(β-Diketiminate)(phosphanylphosphido)] Complexes

2017 ◽  
Vol 56 (18) ◽  
pp. 11030-11042 ◽  
Author(s):  
Rafał Grubba ◽  
Kinga Kaniewska ◽  
Łukasz Ponikiewski ◽  
Beata Cristóvão ◽  
Wiesława Ferenc ◽  
...  
Keyword(s):  
High Spin ◽  
Spectroscopic Characterization ◽  
High Spin Iron

scholarly journals Effects of Imidazole Deprotonation on Vibrational Spectra of High-Spin Iron(II) Porphyrinates

2013 ◽  
Vol 52 (6) ◽  
pp. 3170-3177 ◽  
Author(s):  
Chuanjiang Hu ◽  
Qian Peng ◽  
Nathan J. Silvernail ◽  
Alexander Barabanschikov ◽  
Jiyong Zhao ◽  
...  
Keyword(s):  
High Spin ◽  
Vibrational Spectra ◽  
High Spin Iron

scholarly journals Electronic, Magnetic, and Structural Characterization of the Five-Coordinate, High-Spin Iron(II) Nitrato Complex [Fe(TpivPP)(NO3)]-

2006 ◽  
Vol 45 (14) ◽  
pp. 5284-5290 ◽  
Author(s):  
Habib Nasri ◽  
Mary K. Ellison ◽  
Ben Shaevitz ◽  
Govind P. Gupta ◽  
W. Robert Scheidt
Keyword(s):  
High Spin ◽  
Structural Characterization ◽  
High Spin Iron
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