2001
DOI: 10.1021/ic010610f
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Bidentate Lewis Base Adducts of Methyltrioxorhenium(VII) and Their Application in Catalytic Epoxidation

Abstract: Methyltrioxorhenium(VII) (MTO) forms octahedral adducts with bidentate Lewis bases. These complexes were isolated and fully characterized, including X-ray crystallography. The compounds display distorted octahedral geometry in the solid state with a tendency of disorder concerning the Re central atom. At elevated temperatures, they undergo rapid ligand-exchange reactions in solution. The ease of this ligand exchange depends mainly on the Lewis basicity of the ligand. The more Lewis basic the ligand is, the str… Show more

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Cited by 89 publications
(78 citation statements)
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“…The same situation was also observed by others in the literature. [24,38] However, the stretching vibrations of iminic bonds in the complexes occur between 1618 and 1648 cm and ν asym (Re O) are observed in the above complexes. Generally the difference between the symmetric and asymmetric stretching of ReO 3 moiety is related to the geometry of the MTO complexes.…”
Section: Synthesis and Characterizationmentioning
confidence: 94%
See 1 more Smart Citation
“…The same situation was also observed by others in the literature. [24,38] However, the stretching vibrations of iminic bonds in the complexes occur between 1618 and 1648 cm and ν asym (Re O) are observed in the above complexes. Generally the difference between the symmetric and asymmetric stretching of ReO 3 moiety is related to the geometry of the MTO complexes.…”
Section: Synthesis and Characterizationmentioning
confidence: 94%
“…The results are same as those of complexes c4 and c7 reported by us recently. [34] As is known for most structurally characterized bidentate Lewis base complexes of MTO, [24,25] the three oxygen atoms display a pyramidal facial arrangement. The two nitrogen atoms from di-nitrogen Schiff base and two double-bonded oxygen atoms occupy the equatorial position, while the methyl group and the remaining oxygen atom reside in the apical sites in a trans position.…”
Section: X-ray Crystal Structures Of Complex C5mentioning
confidence: 96%
“…No significant differences in catalytic performance were found. The behaviour of the complexes under irradiation with UV light was investigated by means of 17 O-NMR and UV/Vis spectroscopy. The herein exposed experiments aimed for probing potential beneficial effects of chromophoric N-donor ligands in MTO adducts, as they might activate the catalytic system by providing additional energy for weakening bonds that have to be broken during the catalytic cycle.…”
mentioning
confidence: 99%
“…MTO reacts with monodentate and bidentate nitrogen ligands to give trigonal bipyramidal and distorted octahedral adducts, respectively. [36] Since a strong influence of added nitrogen ligands has been observed in a related MTO-catalyzed epoxidation-phosphorylation of glycals either in the reaction rate or the stereoselectivity, [37] a series of pre-formed amine-MTO compounds 5 -7 has been also prepared and tested in this reaction [ …”
Section: Introductionmentioning
confidence: 99%