Selectivity of Anilinedipropionic Acids to Copper(II) Ions:
The Synthesis and Crystal Structure
of [CuAdp(H₂O)₂] 1/3CH₃OH 1/6C₂H₅OH
(Adp = Aniline-N,N-di-3-propionate)

Yu. A. Skorik*, N. V. Podberezskaya**, G. V. Romanenko**,
E. V. Osintseva***, L. K. Neudachina****, and A. A. Vshivkov****

* AQUIPAI, Faculdade de Ciências, Universidade do Porto, Porto, Portugal

** Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences,
pr. Akademika Lavrent’eva 3, Novosibirsk, 630090 Russia

*** Institute of Metallurgy, Ural Division, Russian Academy of Sciences,
Yekaterinburg, Russia

**** Ural State University, pr. Lenina 51, Yekaterinburg, 620083 Russia

Received June 28, 2002

Abstract—The complex [CuAdp(H₂O)₂] · 1/3CH₃OH · 1/6C₂H₅OH (Adp = aniline-N,N-di-3-propionic acid)
has been synthesized and structurally studied. The complex crystallizes in the trigonal system, space group R,
a = 16.433(2) Å, c = 32.754(7) Å, V = 7660(2) ų , Z = 18, R = 0.0445 for 3148 reflections with I 2(I ). The
tetragonal-pyramidal coordination (4 + 1) of the Cu atom is formed of two O atoms and the N atom of the tri-
dentate Adp ligand, as well as the two oxygen atoms of water molecules. The aminodipropionate group of the
ligand resides in the basal plane of the pyramid (average Cu–O 1.939 Å, Cu–N 2.051 Å), as well as one of the
coordinated water molecules (Cu–O(w) 2.009 Å). The apical position is occupied by the second water molecule
(Cu–O(w) 2.298 Å). The benzene ring of the ligand is normal to the basal plane, so that the ortho-H atom occu-
pies the sixth coordination position (Cu–H 2.650 Å). Some factors governing the copper(II) selectivity of Adp
have been recognized.

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