Crystal and molecular structure of deoxynupharidine hydrobromide

Abstract

The crystal structure of deoxynupharidine hydrobromide, C₁₅H₂₃ON,HBr, has been determined by a three-dimensional X-ray analysis. The crystals are orthorhombic, a= 13·886, b= 12·807, c= 8·463 Å, Z= 4, space group P2₁2₁2₁. The intensities were measured with a Hilger and Watts automatic four-circle diffractometer using Mo-K_α radiation. The structure was solved by the programme SEARCHER, for the automatic heavy-atom analysis, and refined by full-matrix least-squares calculations to a final R of 0·047 for 1565 independent observed reflexions. The absolute configuration was determined by the anomalous dispersion method.