Characterization of a six-coordinate ferrous high-spin heme with both intramolecular axial carboxylic acid and pyridine.
Synthesis of a bis-strapped porphyrin with a pyridyl residue on one side and a malonic acid on the other side gives after iron(II) insertion a six-coordinate complex in which both apical groups are the two axial ligands of the iron atom. Unexpectedly, this six-coordinate iron(II) complex proves to be high-spin, likely due to some stabilization of the axial metal-ligand antibonding orbitals.
Hijazi
Ismail
I
UMR CNRS 6226 Université de Rennes1, Sciences Chimiques de Rennes, Campus de Beaulieu, 35042 Rennes Cedex, France.
Roisnel
Thierry
T
Even-Hernandez
Pascale
P
Furet
Eric
E
Halet
Jean-François
JF
Cador
Olivier
O
Boitrel
Bernard
B
D002264:Carboxylic Acids / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005296:Ferrous Compounds / Q000737:chemistry*; D006418:Heme / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D011725:Pyridines / Q000737:chemistry*
D002264:Carboxylic Acids; D005296:Ferrous Compounds; D011725:Pyridines; D006418:Heme; C023666:pyridine