Comparative spectroscopic and theoretical studies on the conformation of some α-diethoxyphosphoryl carbonyl compounds and their α-ethylsulfonyl analogues
1
Abstract
Comparative νCO ⋯
C(CO) contact in comparison with the O(PO)
⋯
C(CO) one and are discussed in terms of Olp→π*CO charge transfer and electrostatic interactions, which are stronger for series II than for I, indicating that the
S–CH2 and O
P–CH2 moieties seem to be responsible for this behaviour as indicated by X-ray study and ab initio calculations of dialkyl (methylsulfonyl)methylphosphonate MeSO2CH2P(O)(OR)2 (R = Et 18, Me 18a).