20219-84-5Relevant academic research and scientific papers
Oxygen Atom Transfer in the Oxidation of Triphenylphosphine by μ-Oxo-bis
Ercolani, Claudio,Gardini, Marcello,Pennesi, Giovanna,Rossi, Gentilina
, p. 549 - 550 (1983)
It has been shown that μ-oxo-bis can oxidize triphenylphosphine to triphenylphosphine oxide in the presence of pyridine under mild conditions, resulting in the formation of the corresponding FeII-bis adduct; this reaction is a rare example of O atom transfer by a μ-oxo FeIII oligomer.
Oxochromium compounds. 1. Synthesis and properties of μ-oxo chromium-iron porphyrin and phthalocyanine compounds
Liston, David J.,Kennedy, Brendan J.,Murray, Keith S.,West, Bruce O.
, p. 1561 - 1567 (2008/10/08)
The reaction between CrIVO(P) and FeII(P′) leads to the formation of μ-oxo heterobinuclear complexes (P)CrOFe(P′) where P and P′ represent dianions of porphyrins that may be the same or different. [Abbreviations for the dianions of 5,10,15,20-tetraarylporphyrins: TPP, tetraphenylporphyrin; TTP, tetra-p-tolylporphyrin; TMP, tetrakis(p-methoxyphenyl)porphyrin; TFP, tetrakis(p-fluorophenyl)porphyrin; TCP, tetrakis(p-chlorophenyl)porphyrin; TXP, tetra-3,5-xylylporphyrin; OEP, the dianion of 2,3,7,8,12,13,17,18-octaethylporphyrin; Pc, the dianion of the phthalocyanine molecule.] The complexes react with heterocyclic Lewis bases, and these coordinate to Cr only. The visible, infrared, 1H NMR, and Mo?ssbauer spectra are reported for the compounds. The variation of magnetic susceptibility with temperature down to 4.2 K is interpreted in terms of strong antiferromagnetic coupling between Cr(III) (S = 3/2) and Fe(III) (S = 5/2) centers with J values in the range -130 to -150 cm-1. Zero field splitting effects are important at low temperatures. The reaction of CrO(TPP) with FeII(Pc) forms an analogous μ-oxo complex having porphyrin and phthalocyanine groups attached to Cr(III) and Fe(III), respectively.
