Anomalous vibrational modes in acetanilide: A F. D. S. incoherent inelastic neutron scattering study

Conference · Tue Jan 01 00:00:00 EST 1991

DOI:https://doi.org/10.1007/3-540-54890-4_160· OSTI ID:5376982

Barthes, M; Moret, J ^[1]; Eckert, J; Johnson, S W; Swanson, B I; Unkefer, C J ^[2]

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1. Montpellier-2 Univ., 34 (France)
2. Los Alamos National Lab., NM (United States)

The origin of the anomalous infra-red and Raman modes in acetanilide (C{sub 6}H{sub 5}NHCOCH{sub 3}, or ACN), remains a subject of considerable controversy. One family of theoretical models involves Davydov-like solitons nonlinear vibrational coupling, or polaronic'' localized modes. An alternative interpretation of the extra-bands in terms of a Fermi resonance was proposed and recently the existence of slightly non-degenerate hydrogen atom configurations in the H-bond was suggested as an explanation for the anomalies. In this paper we report some new results on the anomalous vibrational modes in ACN that were obtained by inelastic incoherent neutron scattering (INS).

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5376982
• Report Number(s): LA-UR-91-2733; CONF-9106269-1; ON: DE91018031
• Resource Relation: Journal Volume: 393; Conference: 7. international workshop on nonlinear coherent structures, Dijon (France), Jun 1991
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ANILINE
NEUTRON DIFFRACTION
VIBRATIONAL STATES
INELASTIC SCATTERING
RAMAN EFFECT
AMINES
AROMATICS
COHERENT SCATTERING
DIFFRACTION
ENERGY LEVELS
EXCITED STATES
ORGANIC COMPOUNDS
SCATTERING
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory
400201 - Chemical & Physicochemical Properties
400100 - Analytical & Separations Chemistry