82475-16-9Relevant academic research and scientific papers
BOTH-FACES HINDERED PORPHYRINS. PART 2. SYNTHESIS AND CHARACTERIZATION OF INTERNALLY FIVE-CO-ORDINATED IRON(II)BASKET-HANDLE PORPHYRINS DERIVED FROM 5,10,15,20-TETRAKIS(O-HYDROXYPHENYL)PORPHYRIN
Momenteau, Michel,Mispelter, Joel,Loock, Bernard,Lhoste, Jean-Marc
, p. 61 - 70 (2007/10/02)
Compounds (9), so-called ether 'hanging base' porphyrins, derived from 5,10,15,20-tetrakis(o-hydroxyohenyl)porphyrin in which one of the faces is hindered by a pyridine-3,5-diylbisalkylene bridge and the other face is protected by an alkylene or an p-arylenebisalkylene chain have been synthesized following the concept of the 'basket handle' porphyrins (BHP).From an analysis of the 1H n.m.r. spectra of the iron(II) derivatives (20) at 34 degC, it has been determined that ca. 85percent were high-spin five-coordinated complexes (s=2).Despite the steric hindrance of the distal face, bimolecular associations typical for this class of compounds have been detected except for the most hindered (20c).An additional bispyridine 'basket handle' porphyrin (21) has been synthesized in order to study the dynamics of the pyridine chain.
Kinetic Evidence for Dioxygen Stabilization in Oxygenated Iron(II)-Porphyrins by Distal Polar Interactions
Momenteau, M.,Lavalette, D.
, p. 341 - 343 (2007/10/02)
The newly synthesized iron(II) 'hanging base' porphyrins (8) and (9) provide evidence that polar groups on the distal side of the heme strongly increase the stability of the oxygenated complexes by reducing the rate constant for dissociation of dioxygen.
