The crystal structure of monochloro trinitro copper (II) lignocaine complex, CuC28H44O11N7Cl, has been determined by X-ray diffraction using CuK(alpha) radiation. The compound crystallizes in the monoclinic space group P 2(1)/n with unit cell parameters a=10.554(2) angstrom, b = 24.402(7)angstrom, c = 14.124(3) angstrom, beta = 100.025(20)-degrees with Z = 4, D(c) = 1398 Mg m-3, D(m) = 1.391 Mg m-3, mu = 2.08 mm-1. The structure was solved using 5242 reflections I > 2.5sigma (I)] out of 6764 reflections using MULTAN. The final residuals are R(f) = 0.120 (R(w) = 0.109). The copper coordination is seven in.the complex. The plane of one of the nitrate groups almost bisects the molecule
