Crystallographic comparison of 4-cyano-4′-n-decycloxybiphenyl and 4-cyano-4′-n-dodecycloxybiphenyl

The crystal structures of 4-cyano-4′-n-decycloxybiphenyl (C 23H29NO) (I) and 4-cyano-4′-n-dodecycloxybiphenyl (C25H33NO) (II) have been determined by X-ray diffraction methods. I and II crystallize in the monoclinic system with space group C2/c. The final R-factor for I is 0.066 (F>o 4σ(Foo) and 0.085 for all data, wR(F2) = 0.189 for 2444) and it is 0.068 for II (Fo>4σ(Fo) and 0.111 for all data, wR(F 2) = 0.164 for 1723). Both phenyl rings are almost planar, and dihedral angle between both rings is 31.2(7)° and 31.0(2)° for I and II, respectively.