Solid-State NMR Characterization of C- and N-Labelled Phthalimides: Model Compounds for Studying Polyimides

Abstract

15N CSA spectra were acquired for four isotopically labelled bisphthalimide compounds. The 15N CSA tensor elements (delta 11, delta 22, and delta 33) for the labeled derivatives were determined from CSA line shape analysis. In addition, the CSA spectrum for the 15N-13C labelled N-methylphthalimide was obtained. From CSA lineshape analysis it was determined that delta 33 lies approximately along the N-C bond axis, with delta 22 assumed to be approximately perpendicular to the imide plane. The angles alpha and Beta were found to be 90 deg and 7 deg, respectively. The dipolar coupling constant for 13C-l 5N bond was 883 Hz, corresponding to a bond length of 1.51 A.

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Document Details

Document Type
Technical Report
Publication Date
Nov 15, 1994
Accession Number
ADA286479

Entities

People

  • C. G. Johnson
  • Lou J. Mathias
  • William L. Jarrett

Organizations

  • University of Southern Mississippi

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acquisition
  • Chemical Shifts
  • Chemistry
  • Classification
  • Couplings
  • Cross Polarization
  • Electron Density
  • Experimental Data
  • Imides
  • Magnetic Resonance
  • Military Research
  • Organic Compounds
  • Physical Properties
  • Polymers
  • Quantum Properties
  • Spectra
  • Two Dimensional

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  • Organic Chemistry