Two 9-alkylthiophenanthrenes at 193 K (alkyl = dodecyl and tetradecyl)

Two isostructural 9-thiophenanthrene derivatives, 9-dodec­ylthiophenanthrene, C₂₆H₃₄S, (I), and 9-tetradecylthiophen­anthrene, C₂₈H₃₈S, (II), are reported. They crystallize in the monoclinic space group P2₁/c with four molecules in a unit cell. The S—C_phenanthrene bonds are 1.767 (2) and 1.772 (4) Å and S—C_alkyl bonds are 1.809 (2) and 1.804 (4) Å for (I) and (II), respectively. The bond angles at S are 104.04 (11) and 104.0 (2)° for (I) and (II), respectively.