Crystal structure of narcissidine methiodide

Abstract

An X-ray structural analysis of narcissidine methiodide shows that the compound crystallises in the monoclinic system, space group P2₁, Z= 2 in a unit cell of dimensions a= 12·04 ± 0·06, b= 7·57 ± 0·04, c= 11·46 ± 0·06 Å, and β= 100·2 ± 0·3°. The structure was solved by conventional Patterson and Fourier methods and refined to R 0·106 for 1029 observable reflections. The analysis has confirmed the results of a slightly earlier study of the hydrobromide derivative of the same alkaloid and has shown that the previously accepted structure was incorrect.