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Cyclophanes O 0450Synthesis and Study of "Nonuniform" Naphthylenephosphacyclophanes. -A variety of nonuniform phosphacyclophanes containing trivalent phosphorus derived from two different dihydroxynaphthalenes [cf. (V), 10 examples] are synthesized, which appear to be stable systems. Therefrom derived phosphacyclophanes containing pentavalent phosphorus [cf. (VI)] are found to possess a mutated overall configuration and decreased stability. -(RASADKINA*, E. N.; SLITIKOV, P. V.; MEL'NIK, M. S.; NIFANT'EV, E. E.; Russ. Chem. Bull. 53 (2004) 2, 376-382; Dep. Chem., Moscow Pedagog. State Univ., Moscow 119021, Russia; Eng.) -R. Staver 46-062