ISBN: 978-83-60043-10-3 - eurobic9

Eurobic9, 2-6 September, 2008, Wrocław, Poland
P17. Non-isotype Crystals in Salts of 2, 6-diaminopurinium(1+)
and bis(pyridine-2, 6-dicarboxylate)metal(II) Anions (M = Co or Cu)
M. Brandi-Blanco a , D. Choquesillo-Lazarte b , J. M. González-Pérez c , A. Castiñeiras d ,
J. Niclós-Gutiérrez c
a
Fakultät Chemie, Lehrstuhl für Bioanorganische Chemie, Technische Universität Dortmund, Otto-Hahn-
Strasse 6, D-44227 Dortmund, Germany
e-mail: pbrandi@correo.ugr.es
b
Laboratorio de Estudios Cristalográficos, IACT-CSIC, Edif. Inst Lopez-Neyra, PTCS. Avda. del Conocimiento
s/n, E-18100 Armilla, Granada, Spain
c
Department of Inorganic Chemistry, University of Granada, Fac. Pharmacy, Campus Cartuja, E-18071
Granada, Spain
d
Department of Inorganic Chemistry, University of Santiago, Fac. Pharmacy, Campus Sur, E-15782 Santiago
de Compostela, Spain
Adeninium(1+) cations generate an iso-structural series of compounds (H2ade)2[M II (pdc)2]·3H2O with M = Mn,
Co, Ni Cu or Zn. Hade + exists as nearly coplanar pairs of tautomers A:B (with protons on N1 and N9 or N3 and
N7) H-bonded in (A:B)n ladders. In the crystal of (H2dap)2[Cu II (pdc)2]·4H2O the 2, 6-diaminopurinium(1+)
cations only have dissociable protons in N3 and N7 forming non-equivalent homo-pairs, {H2dap(1) + }2 and
{H2dap(2) + }2 using N1 as acceptor and an N6-H or N2-H as donors. These homo-pairs alternate in laddered
chains (see A). The crystal of (H2dap)2[Co II (pdc)2]·6H2O has also two non-equivalent H2dap(1) + and H2dap(2) +
which form homo-pairs with or without the mediation of water (B and C).
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