Vibrational spectra of carboxylate complexes. VII. Partial valence trapping in a trinuclear mixed-valence iron(III,III,II) cluster: vibrational spectra of [Fe3O(OOCCH3)6L3] and related mixed-metal complexes

1987 ◽  
Vol 109 (7) ◽  
pp. 2009-2016 ◽  
Author(s):  
L. Meesuk ◽  
U. A. Jayasooriya ◽  
R. D. Cannon
Keyword(s):  
Metal Complexes ◽  
Vibrational Spectra ◽  
Mixed Valence ◽  
Carboxylate Complexes ◽  
Mixed Metal ◽  
Mixed Metal Complexes

scholarly journals Preparation and characterization of novel oxo-centered basic p-chlorobenzoic bridging trinuclear complexes

2010 ◽  
Vol 75 (7) ◽  
pp. 929-934 ◽  
Author(s):  
Iman Khosravi ◽  
Mohammad Yazdanbakhsh
Keyword(s):  
Metal Complexes ◽  
Mixed Valence ◽  
Uv Spectra ◽  
Carboxylate Ligand ◽  
Direct Reaction ◽  
Pyridine Ligand ◽  
Chlorobenzoic Acid ◽  
Mixed Metal ◽  
Trinuclear Complexes ◽  
Mixed Metal Complexes

Three new oxo-centered trinuclear complexes, one of them a mixed-valence complex [Mn3O(C7H4O2Cl)6(Py)3]Py (1) and the others, mixed-metal complexes of [Fe2MnO(C7H4O2Cl)6(Py)3]NO3 (2) and [Fe2CoO(C7H4O2Cl)6(Py)3] (3) were synthesized by the direct reaction between metal nitrates and p-chlorobenzoic acid. These complexes were characterized by elemental analyses (CHN), atomic absorption spectroscopy and spectral (IR, electronic) studies. These are new type of oxo-bridged mixed-metal complexes in which the carboxylate ligand is pchlorobenzoic acid. The UV spectra of the complexes exhibited a strong band in the region 42,500 cm-1 which is related to the (? ? ?*) transitions of the pyridine ligand. The IR spectra of these compounds showed two strong stretching vibrations bands, indicating a bridging coordination mode of the carboxylic group of the ligand in the complexes.

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