Accession Number:

AD0258393

Title:

SOLID-STATE VIBRATIONAL SPECTRA OF METHYL AND METHYL-D3 CYANIDE

Descriptive Note:

Corporate Author:

MELLON INST PITTSBURGH PA

Personal Author(s):

• MILLIGAN,DOLPHUS E.
• JACOX,MARILYN E.

Report Date:

1961-05-25

Pagination or Media Count:

1.0

Abstract:

The vibrational fundamentals of thin films of CH3CN and CD3CN at 77 K were observed using a high resolution, double beam grating spectrometer. Evidence is presented for 3 absorptions, assigned to nu3, nu6, and nu7 nu8, in the 11300 to 11500 cm region of the CH3CN spectrum. Annealing from an initial glassy state to a crystalline form is observed for these deposits. The multiplet structure of the annealed samples indicates that CH3CN and CD3CN crystallize in the orthorhombic, tetragonal, or trigonal system. Contrary to predictions based on quadrupole resonance studies, the crystal does not preserve the threefold symmetry of the molecule about its CN triple bond. Although assignment to a crystal class must remain indefinite, the simplest possibility has point symmetry C sub 2v. Author

Descriptors:

• *CYANIDES
• *DEUTERIUM COMPOUNDS
• *INFRARED SPECTROSCOPY
• *NITRILES
• ABSORPTION
• CRYSTAL STRUCTURE
• METHYL RADICALS
• SOLID STATE PHYSICS
• THIN FILM STORAGE DEVICES
• VIBRATION

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE