Al-Amri, A.; Monwar, M.; McCord, E. F.; Buback, M.; Latz, H.; Rinaldi, P. L.
Characterization of carbon monoxide centered triads in poly[ethylene-co-(butyl acrylate)-co-(¹³C-carbon monoxide)] by isotopic labeling and two-dimensional NMR
Macromolecular Chemistry and Physics 2005, 206, 1520-1529.
 

Poly[ethylene-co-(butyl acrylate)-co-(carbon monoxide)] (polyEBC) samples, prepared from ¹³C-labeled carbon monoxide, were characterized using two dimensional (2D) pulsed field gradient (PFG) 750 MHz NMR spectroscopy. To elucidate the complex mixture of structures present in this terpolymer, 2D ¹H/¹³C-heteronuclear multiple bond correlation (HMBC) experiments were conducted by selectively exciting the enhanced peaks resulting from ¹³C-labeling. High resolution 2D NMR combined with ¹³C-labeling of the polymer greatly simplifies the 2D NMR spectra, selectively enhances the weak peaks from low occurrence C-centered triad structures and aids in their resonance assignments.