1 research outputs found
Phyllanthus emblica
The experimentally observed stereomutation of spiro-1,2-oxaphosphetanes
is shown by DFT calculations to proceed through successive M<sub>B2</sub> or M<sub>B4</sub> and M<sub>B3</sub> mechanisms involving two, four,
and three Berry pseudorotations at phosphorus, respectively. Oxaphosphetane
decomposition takes place in a single step via a polar transition
state. The calculated activation parameters for this reaction are
in good agreement with those determined experimentally