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

Eurobic9, 2-6 September, 2008, Wrocław, Poland
P66. A Family of Ternary Copper(II) Complexes
with Cu-N9(H(N7)hypoxanthine) Coordination Bond
J. M. González-Pérez a , D. Kumar Patel a , D. Choquesillo-Lazarte b , A. Castiñeiras c , I. García-
Santos c , J. Niclós-Gutiérrez a
a
Department of Inorganic Chemistry, University of Granada, Fac. Pharmacy, Campus Cartuja, E-18071
Granada, Spain
e-mail: jmgp@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 Santiago, Fac. Pharmacy, Campus Sur, E-15782 Santiago
de Compostela, Spain
N9 is believed to be the most basic donor atom of hypoxanthine (H(N9)hyp). In crystals, various coordination
modes are known for Hhyp: M-N7(H(N9)hyp), Cu II -µ2-N3, N7(H(N9)hyp)-Cu II and M II -µ2-N3, N9(H(N7)hyp)-
M II . However, any structural evidence exists for complexes with only a metal-N9(Hhyp) bond. We report
structures of five novel Cu II -(IDA-like)-Hhyp compounds with N-methyl-, N-benzyl-, N-(p-Fbenzyl)- and, Nphenethyl-IDA
or p-xylylene-di(IDA) ligands: [Cu(MIDA)(Hhyp)(H2O)]·H2O 1, [Cu(NBzIDA)(Hhyp)]n 2,
[Cu(FBIDA)(Hhyp)(H2O)]·2.5H2O 3, [Cu(pheida)(Hhyp)(H2O)] ·2H2O 4 and [Cu2(p-
XDTA)(Hhyp)2(H2O)2]·2H2O 5 (see Figure), respectively. These compounds feature are 4+1 Cu(II) coordination
and a Cu-N9(H(N7)hyp) coordination bond, but not an intra-molecular interligand N-H···O(IDA-like) interaction
[1], because the tautomer H(N7)hyp has not the required N3-H moiety.
Reference
[1] D. Choquesillo-Lazarte, M.P. Brandi-Blanco, I. García-Santos, J. M. González Pérez, A. Castiñeiras, J.
Niclós-Gutiérrez, Coord. Chem. Rev. 252 1241-1256 (2008).
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