title: Methyl 3,5,5,6,8,8-hexa-methyl-5,6,7,8-tetra-hydro-naphthalene-2-carboxyl-ate (AHTN-COOMe).
abstract: Crystals of the title compound, C(18)H(26)O(2), were grown from ethyl acetate. Due to the racemic precursor, the title compound is also obtained as a racemate. Disorder was observed during structure refinement, originating from two possible half-chair conformations of the non-aromatic ring. The disorder was refined by introducing split positions in the cyclo-hexane ring regarding the two possible R and S-enantiomers at the chiral CH group [ratio 0.744 (3):0.256 (3)]. The crystal structure features pairs of inversion-related molecules connected by pairs of non-classical C-H⋯O hydrogen bonds.
authors.affiliation: BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Strasse 11, D-12489 Berlin-Adlershof, Germany.
authors.forename: Paul
authors.initials: P
authors.lastname: Kuhlich
authors.forename: Franziska
authors.initials: F
authors.lastname: Emmerling
authors.forename: Christian
authors.initials: C
authors.lastname: Piechotta
authors.forename: Irene
authors.initials: I
authors.lastname: Nehls