Synthesis, Structure, and Properties of 4,8,12-Trioxa-12c-phospha-4,8,12,12c-tetrahydrodibenzo- [cd,mn]pyrene, a Molecular Pyroelectric

摘要

The title compound (4) was synthesized, and its crystalline structure was determined. The molecule has C_3v point symmetry and crystallizes in the trigonal space group R3m, Crystal data for 4: a=16.6710(13) ?, c=4.2590(3) ?, α=β=90 deg, γ=120 deg , Z=3, R(F)=0.0234. The material has a permanent polarization and consequent pyroelectric properties.