Tetrakis(mu-guanidinoacetic acid-kappa 2O:O')bis[(nitrato-kappa O)copper(II)].
The title compound, [Cu(2)(NO(3))(2)(C(3)H(7)N(3)O(2))(4)], forms a centrosymmetric dimer, with the two Cu(2+) ions separated by 2.6525 (6) A. The asymmetric unit contains a Cu atom coordinated to two guanidinoacetic acid ligands (via one carboxylate O atom from each ligand) and to a nitrate group. The inversion centre in P-1 generates the entire molecule, in which each Cu atom is coordinated to four carboxylate and to one nitrate O atom; ignoring the Cu-Cu separation, the geometry about each Cu atom is square pyramidal. The amino acid ligand is in the zwitterionic form. Strong N-H.O hydrogen bonds lead to a three-dimensional supramolecular structure, in which the N.O distances are in the range 2.931 (4)-3.278 (3) A, with N- H.O angles ranging from 128 to 170 degrees.
Lopes de Miranda
Jussara
J
Departamento de Química Inorgânica, Instituto de Química, Universidade Federal do Rio de Janeiro, 21945-970 Rio de Janeiro, RJ, Brazil.
Felcman
Judith
J
Wardell
James L
JL
Skakle
Janet M S
JM