ISSN 10703284, Russian Journal of Coordination Chemistry, 2015, Vol. 41, No. 12, pp. 823–828. © Pleiades Publishing, Ltd., 2015.
Original Russian Text © S.I. Levchenkov, L.D. Popov, S.S. Beloborodov, I.N. Shcherbakov, G.G. Aleksandrov, Yu.P. Tupolova, V.V. Lukov, V.A. Kogan, 2015, published in Koordi
natsionnaya Khimiya, 2015, Vol. 41, No. 12, pp. 756–761.
Bishydrazones of 2,6diformyl4Rphenols are
classical binucleating ligand systems, whose structure
predetermines the formation of binuclear complexes
with many transition metals [1–3]. Numerous studies
of transition metal complexes with these ligands made
it possible to formulate a series of regularities that are
used for the prediction of the structures and magnetic
properties of the complexes [4, 5]. The lanthanide
complexes with 2,6diformyl4Rphenol bishydra
zones were studied to a significantly lower extent. Only
several similar compounds were structurally studied
[6–11], and the slow relaxation of magnetization was
found for one of the binuclear dysprosium(III) com
plexes . The magnetic properties of bi and polynu
clear lanthanide complexes attract attention of many
researchers due to developments of new molecular
magnetic materials [12–15].
The results of the Xray diffraction and magne
tochemical studies of the binuclear dysprosium(III)
complex with 2,6diformyl4
L) are presented in this
was synthesized using a
described procedure .
hot solution of dysprosium(III) nitrate (1 mmol) in
methanol (10 mL) was poured to a hot solution of
(1 mmol) in methanol (30 mL). The reaction mixture
was refluxed with a reflux condenser for 1 h and left to
stay overnight. The precipitate was filtered off, washed
with methanol, dried in vacuo, and recrystallized from
ethanol. The yield was 30%.
(NH), 1610, 1595
IR spectra were recorded on a Varian Scimitar 1000
FTIR instrument in a range of 400–4000 cm
samples as suspensions in Nujol.
The magnetic susceptibility of complex
in a tem
perature range of 300–2 K was determined on a Quan
tum Design SQUID magnetometer in a magnetic field
of 5 kOe.
Xray diffraction analysis
out on a Bruker APEX II diffractometer (
Å, graphite monochromator) at
120(2) K. The initial massif of measured intensities
was processed using the SAINT  and SADABS
programs . The structure was solved by a direct
method and refined by fullmatrix least squares in the
anisotropic approximation for nonhydrogen atoms
for Hydrogen atoms were placed in the geometri
anal. calcd., %: C, 51.04; H, 4.43; N, 17.86.
Found, %: C, 50.54; H, 4.29; N, 17.51.
Binuclear Dysprosium(III) Complex with 2,6Diformyl4
Crystal Structure and Magnetic Properties
S. I. Levchenkov
*, L. D. Popov
, S. S. Beloborodov
, I. N. Shcherbakov
, G. G. Aleksandrov
Yu. P. Tupolova
, V. V. Lukov
, and V. A. Kogan
Southern Scientific Center, Russian Academy of Sciences, RostovonDon, Russia
Southern Federal University, RostovonDon, 344104 Russia
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia
Received April 23, 2015
—The Dy(III) binuclear complex with N
L) of the composition [Dy
OH (CIF file CCDC 1048418)
is synthesized and structurally characterized. In the complex cation [Dy
, ligands H
threeblade helix around the Dy(III) ions. Both rightside (
configuration) and leftside (
) helicates are
presented in crystal in an equimolar ratio. The magnetic properties of the complex are studied.