Crystal and molecular structure of dinitratobis(methyl-α-picolylamine)-copper(II)

Abstract

The single-crystal, X-ray analysis of dinitratobis(methyl-α-picolylamine)copper(II) has shown the crystals to be monoclinic with space group P2₁/c, a= 7·04(2), b= 14·60(4), c= 10·08(3)Å, and β= 123·4(1)°. The structure, which has refined to a final R of 0·079, consists of strictly centro-symmetric molecules containing tetragonally distorted, octahedrally co-ordinated copper(II) ions; the mean copper–nitrogen distance is 2·03 Å and the copper–oxygen distance is 2·51 Å. The assignment of positional parameters to all hydrogen atoms allows a discussion of the importance of steric factors in determining the structure of this slightly overcrowded molecule.