W0020
2D Crystal Structure of the Heterometallic
CuIICdII Complex Containing a Unique Polymeric Ladder-like
Anion
[Cd2(O2CMe)6]2–n.
O.V. Pryma1, S.R. Petrusenko1, V.N. Kokozay1,
M.V. Zhigalko2 and O.V. Shishkin2, 1Chemistry
Dept, National Taras Shevchenko Univ., Volodimirska St 64, Kyiv 01033, Ukraine,
2Scientific Research Dept of Alkali Halide Crystals, STC
“Institute for Single crystals”, National Academy of Sciences of
Ukraine, Lenina Ave 60, Khar’kov 31001, Ukraine.
Copper powder reacts with cadmium oxide and ammonia acetate in
methanol solution of ethylenediamine affording novel heterometallic complex
{[Cu(en)2][Cd2(O2CMe)6]}
n. The crystal structure has been determined by X-ray crystallography
(SIEMENS P3/PC, MoK, 2/-scan), solved by direct method and refined by
full-matrix least-squares technique. The crystallographic computation was
performed with SHELXTL package.
The compound crystallized in triclinic system with space group
P_1 and the cell dimensions are: a = 6.662(1), b = 10.460(2), c = 10.822(2)
Å, _ = 111.61(1), _ = 103.52(2), _ = 97.12(2)o. The number of
molecules in the unit cell Z = 1, volume = 663.0(2) Å3 and
density = 1.911 g/cm3. The crystal structure of the titled complex
consists of 1D ladder-like polymeric anions
[Cd2(O2CMe)6]2–n
and cations [Cu(en)2]2+ forming 2D network by means of
H-bonds. Each pair of Cd(II) atoms in the anion are linked by two acetate groups
which behave simultaneously as chelating bidentate and bridging unidentate
ligands and each of the Cd(II) is further coordinated by one chelating and two
additional anti-anti bridging bidentate acetates to form two equivalent
CdO7 distorted one-cap trigonal antiprisms joined at their shared
side. The intermetallic Cd(1)···Cd(1A) separation is 3.842(2)
Å. The coordination environment around the Cu atom in
[Cu(en)2]2+ is best described as square planar. The copper
ion is located on an exact crystallographic inversion center. The
[Cu(en)2]2+ cations are encapsulated in the interchains
anionic space. All hydrogen atoms from the ethylenediamine ligands are involved
in N–H...O hydrogen bonds to build up a two-dimensional network.