CONFORMATIONAL PREFERENCES OF SPIROCYCLIC PENTAOXYPHOSPHORANES VARYING IN RING SIZE

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• When the two sets of positions for the oxygen atoms are simultaneously included, the molecule has a pseudomirror plane which passes through atoms P, C3, C4, C5, C6, and C9 and lies normal to the phenyl group. This pseudo mirror operation takes the A set of oxygen atoms into the B set of oxygen atoms and C1 into C2 (Figures 6)
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