Six-coordinate nitrato complexes of iron(III) porphyrins.
The interaction of tetrahydrofuran (THF) with thin films of the nitrato complexes Fe(III)(Por)(eta(2)-O(2)NO) [Por = meso-tetraphenylporphyrinato (TPP) and meso-tetratolylporphyrinato (TTP) dianion] at low temperature leads to the formation of the six-coordinate nitrato complex Fe(Por)(THF)(NO(3)), which was characterized by IR and UV-visible spectroscopies. Formation of the THF adduct was accompanied by nitrate linkage isomerization from bidentate to monodentate coordination. The iron(III) center remains in a high spin state in contrast with the previously observed low-spin nitratonitrosyl complex Fe(TPP)(NO)(eta(10-ONO(2)). Upon warming, THF dissociates to restore the initial five-coordinate bidentate nitrato complex.
Gulyan
Gurgen M
GM
Molecule Structure Research Center NAS, 26 Azatutyan av, Yerevan, Armenia.
Kurtikyan
Tigran S
TS
Ford
Peter C
PC
D005290:Ferric Compounds / Q000737:chemistry*; D007536:Isomerism; D009566:Nitrates / Q000737:chemistry*; D011166:Porphyrins / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared
D005290:Ferric Compounds; D009566:Nitrates; D011166:Porphyrins