Conclusions
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1.
Substituted 5-phenyl-5-seleno-1,3,5-dioxaphosphorinanes exist as stereoisomers that differ in the orientation of substituents at the P and C atoms. In the case of 5-phenyl-5-seleno-2,4,6-trimethyl-l,3,5-di-oxaphosphorinane, the thermodynamically stable stereoisomer is the one in the chain conformation with an axial phenyl at the phosphorus atom.
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2.
5-Phenyl-5-seleno-l,3,5-diazaphosphorinanes are mixtures of conformers that differ in the orientation of the phenyl at the phosphorus atom.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 127–131, January, 1982.
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Arbuzov, B.A., Erastov, O.A., Zyablikova, T.A. et al. Three-dimensional structure of 5-phenyl-5-seleno-1,3,5-dioxa- and 5-phenyl-5-seleno-1,3,5-diazaphosphorinanes. Russ Chem Bull 31, 119–123 (1982). https://doi.org/10.1007/BF00954421
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DOI: https://doi.org/10.1007/BF00954421