INQUIMAE   12526
INSTITUTO DE QUIMICA, FISICA DE LOS MATERIALES, MEDIOAMBIENTE Y ENERGIA
Unidad Ejecutora - UE
artículos
Título:
catena-Poly[[[tetrakis(ì-2-butenoato)dicopper(II)]-ì-2-
Autor/es:
PEREC, M.; GARLAND, M.T.; BAGGIO, R.
Revista:
Acta Crystallographica
Editorial:
journals.iucr.org
Referencias:
Año: 2008 vol. E64 p. 1463 - 1464
ISSN:
1600-5368
Resumen:
The title compound {[Cu2Ho2(C4H5O2)10(H2O)4]_3H2O}n, is a
one-dimensional 3d/4f organicinorganic hybrid complex, the
HoIII member of the isotypic lanthanoid series with Ln =
GdIII, ErIII and YIII. The structure shows an alternation of Cu2
and Ho2 dinuclear units bridged by the ligands and hydrogen
bonds only. The chains are composed of Cu2 classical dinuclear
µ1: µ 1:h2 fourfold bridges [Cu...Cu = 2.6417 (9) A ˚ ] and of Ho2
units bridged by two µ2: µ1:h2 carboxylate units. This results in
distorted square-based pyramidal CuO5 units and irregular
HoO9 units. The alternating Cu2 and Ho2 units are bridged
into linear arrays along the a axis by a set of one µ2: µ1:h2
carboxylate O atom and two hydrogen bonds with Cu...Ho
separations of 4.4883 (10) and 4.5086 (10) A ˚ . The distance
between adjacent chains, as calculated by the closest and
furthest distances between two chains, covers the range 10
14 A ˚ . The H atoms of the water molecules could not be
located, but the O...O separations for these species suggest
the presence of OH...O hydrogen bonds.