Abstract
The structure of the title compound, C18H20N2O, at 173 K has hexagonal (P61) symmetry. The N-containing six-membered ring assumes a half-chair conformation. In the crystal, intermolecular N—H⋯O hydrogen bonding via the amide groups cross-link the molecules along the a axis. The absolute configuration was confirmed by 2D NMR studies.
Highlights
The structure of the title compound, C18H20N2O, at 173 K has hexagonal (P61) symmetry
Intermolecular N—H O hydrogen bonding via the amide groups cross-link the molecules along the a axis
The title compound is a precursor to chiral ligands involving a tetrahydroisoquinoline backbone
Summary
H atoms treated by a mixture of independent and constrained refinement max = 0.14 e Å3. R factor = 0.036; wR factor = 0.088; data-to-parameter ratio = 9.0. The structure of the title compound, C18H20N2O, at 173 K has hexagonal (P61) symmetry. The N-containing six-membered ring assumes a half-chair conformation. Symmetry code: (i) y; x þ y þ 1; z 16. Data collection: APEX2 (Bruker, 2006); cell refinement: SAINT (Bruker, 2006); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: OLEX2. (Dolomanov et al, 2009); software used to prepare material for publication: SHELXL97
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