Valence Angle Correlations in Lactones and Lactams

2 Bond Length and Valence Angle Correlations in RC(=0)X Derivatives 

The following examination of the effect of the substituent X on the structure of RC(=0)X molecules is based on data from microwave spectroscopy, gas-phase electron diffraction and ab initio MO calculations. Ferretti et al. [50] have retrieved results published until 1984 for formyl and acetyl derivatives, R = H or CH3 (see Tables 6.1 and 6.2). The valence angle distributions a, were analyzed by prin- 

ED gas-phase electron diffraction MW microwave spectroscopy MO ab initio MO calcula-  

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