INVESTIGADORES
DOCTOROVICH Fabio Ariel
artículos
Título:
Three transition-metal complexes with the macrocyclic ligand meso-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane (L): [Cu(ClO4)2(L)], [Zn(NO3)2(L)] and [CuCl(L)(H2O)]Cl
Autor/es:
YASMIN, S.; S. SUAREZ; DOCTOROVICH, F.; ROY, T. G.
Revista:
ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2013 vol. C69 p. 862 - 867
ISSN:
0108-2701
Resumen:
The three transition-metal complexes, (meso-5,7,7,12,14,14-
hexamethyl-1,4,8,11-tetraazacyclotetradecane-4N)bis(perchlorato-
O)copper(II), [Cu(ClO4)2(C18H40N4)], (I), (meso-
5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane-
4N)bis(nitrato-O)zinc(II), [Zn(NO3)2(C18H40N4)], (II),
and aquachlorido(meso-5,7,7,12,14,14-hexamethyl-1,4,8,11-
tetraazacyclotetradecane-4N)copper(II) chloride, [CuCl-
(C18H40N4)(H2O)]Cl, (III), are described. The molecules
display a very similarly distorted 4+2 octahedral environment
for the cation [located at an inversion centre in (I) and
(II)], defined by the macrocycle N4 group in the equatorial
sites and two further ligands in trans-axial positions [two O?
ClO3 ligands in (I), two O?NO2 ligands in (II) and one
chloride and one aqua ligand in (III)]. The most significant
difference in molecular shape resides in these axial ligands,
the effect of which on the intra- and intermolecular hydrogen
bonding is discussed. In the case of (I), all strong hydrogenbond
donors are saturated in intramolecular interactions,
while weak intermolecular C?H O contacts result in a
three-dimensional network. In (II) and (III), instead, there
are N?H and O?H donors left over for intermolecular
interactions, giving rise to the formation of strongly linked
but weakly interacting chains.