169297-52-3Relevant articles and documents
Comprehensive Vibrational Spectroscopic Characterization of Nylon-6 Precursors for Precise Tracking of the Beckmann Rearrangement
Chapman, Stephanie,O'Malley, Alexander J.,Parker, Stewart F.,Raja, Robert
, p. 3196 - 3203 (2018)
As a key step in nylon-6 synthesis, the Beckmann rearrangement is an ongoing target of catalytic studies that seek to improve the sustainability of polymer manufacture. Whilst solid-acid catalysts (predominantly zeotypes) have proven effective for this transformation, the development of more active and selective systems demands an understanding of fundamental catalytic mechanisms. In this undertaking, in situ and operando characterization techniques can be informative, provided rigorous spectroscopic groundwork is in place. Thus, to facilitate mechanistic studies we present a detailed investigation of the vibrational spectra of cyclohexanone, cyclohexanone oxime, ?-caprolactam and their D10-isotopomers, in the solid state. Variable-temperature infrared (150–300 K) and Raman (10–300 K) spectra are reported alongside inelastic neutron scattering data. Moreover, where key vibrational modes have been assigned with the aid of periodic density functional theory calculations, it has been possible to include hydrogen-bonding interactions explicitly.
Accessibility and interaction of surface OH groups in microporous and mesoporous catalysts applied for vapor-phase Beckmann rearrangement of oximes
Reddy Marthala,Frey,Hunger
, p. 91 - 97 (2010)
1H and 2H MAS NMR spectroscopy were utilized for investigating the interaction of surface complexes upon adsorption of cyclohexanone and cyclododecanone oxime on MFI-type zeolites and [Al]SBA-15. Signals of hydrogen-bonded and proton
