Magnetic and IR studies on molecular structure of the binuclear iron(III) complexes of bipyridine and phenanthroline

Synthesis, Structure and Property of Oxo-Bridged Binuclear Iron(III) Complex [Fe(phen)(H2O)3]2O?2SO4

“…Some µ-oxo binuclear iron(III) complex, having a ([FeL] 2 O) 4+ , were synthesized, such as ([Fe 2 O(bipy) 4 ](SO 4 ) 2 ·3.5H 2 O) [12] and [(FeL) 2 O](SO 4 ) 2 ·nH 2 O (L = phenanthroline and bipyri- 1 New Materials & Function Coordination Chemistry Laboratory, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China. 2 To whom all correspondence should be addressed; e-mail: ffj2003@ 163169.net dine) [13]. Their magnetic properties and structures were poorly characterized, but the relevant crystal structures have not been obtained until now [11].…”

Single Crystal EPR Studies of [enH2][{Fe(HEDTA)}2O]·6H2O [en = Ethylenediamine; HEDTA = N-Hydroxyethylethylenediaminetriacetate(3−)]

“…It was also found that the magnetic axes ( X , Y , and Z ) were related to the crystallographic axes to within a precision of 5°, by ( a , b , c ) = ( Y , Z , X ) for positive E (since the sign of E could not be determined, the X and Y axes are interchangeable). A study of binuclear iron(III) complexes of bipyridine (bpy) and phenanthroline (phen) included the powder EPR spectra at X-band frequency of the complexes [{Fe(bpy)} 2 O][SO 4 ] 2 ·5H 2 O and [{Fe(phen)} 2 O][SO 4 ] 2 ·6H 2 O. Magnetic susceptibility data led to values of the coupling constant, J ∼ −100 cm -1 , for both of the complexes.…”