. Author manuscript; available in PMC: 2010 Feb 18.

Published in final edited form as: J Am Chem Soc. 2009 Feb 18;131(6):2338–2347. doi: 10.1021/ja808311s

Table 3.

Comparison of the theoretical and experimental O=C-C=C-NH- stretching frequencies of a model cis-enamine acyl-enzyme and isotopologue.



	D cis-enamine (s-cis)	E cis-enamine (D at C6)
Theoretical O=C-C=C-N-stretch (cm⁻¹)	1585	1579
Experimental O=C-C=C-N-stretch (cm⁻¹)	1588	1581