ISSN 10703284, Russian Journal of Coordination Chemistry, 2015, Vol. 41, No. 9, pp. 566–572. © Pleiades Publishing, Ltd., 2015.
Schiff bases are a kind of versatile ligands in coor
dination chemistry which are readily synthesized from
the reaction of primary amines with carbonylcon
taining compounds. In recent years, much work has
been carried out on the syntheses and properties of
Schiff bases and their complexes [1–5]. Schiff bases
derived from salicylaldehyde and primary amines con
stitute one of the most relevant synthetic ligand sys
tems with importance in asymmetric catalysis and
they appear to be of importance for a broad range of
transitionmetal catalyzed reactions including lactide
polymerization, epoxidation of olefins, hydroxylation
and asymmetric ring opening of epoxides [6–10].
Although a number of Schiff bases and their com
plexes have been studied, the relationship between
the selfassembly processes and structures has seldom
been reported. In the present work, we report the syn
thesis, structural and spectroscopic properties of two
new Schiff base zinc(II) complexes, [Zn
), where L is the
monoanionic form of 4methyl2[(2methylamino
The article is published in the original.
Materials and physical measurements.
with AR grade were purchased from Lancaster. Other
reagents and solvents were purchased from Shanghai
Chemical Reagent Company and used as received.
The monoSchiff base HL was prepared according to
the literature method . C, H, and N elemental
analyses were performed on a PerkinElmer 240C ele
mental analyzer. IR spectra were measured with a
Nicolet FTIR 170SX spectrophotometer.
HL (2.0 mmol, 0.385 g) and zinc
bromide (2.0 mmol, 0.450 g) were mixed in methanol.
The mixture was stirred at room temperature for
30 min to give a slight yellow solution. Yellow block
like single crystals of complex
, suitable for Xray dif
Supramolecular SelfAssembly and Crystal Structures
of New Zinc(II) Complexes Derived from 4Methyl2[(2
* and X. Y. Qiu
Department of Public Subject, Shangqiu Medical College, Shangqiu, 476100 P.R. China
Engineering Research Center of Functional Material Preparation, Shangqiu Normal University, Shangqiu, 476000 P.R. China
Received February 1, 2015
A new dinuclear zinc(II) complex, [Zn
), was prepared from 4methyl2[(2methyl
aminoethylimino)methyl]phenol (HL) with zinc bromide in methanol. Selfassembly of
thiocyanate in methanol afforded the mononuclear complex [Zn(L)(HL)]
). Structures of
have been characterized by elemental analysis, IR spectra and single crystal Xray diffraction
(CIF files CCDC nos. 1046617 (
), 1046618 (
possesses a crystallographic twofold rotation
axis symmetry, with Zn
Zn separation of 3.106(1)
contains two mononuclear zinc(II) com
plex cations and one [Zn(NCS)
] complex anion. The Zn(1) atom in
is in a tetrahedral coordination. The
Zn(2) atom in
and the Zn atoms in
are in octahedral coordination. Crystals of
complexes are stabi
lized by hydrogen bonds.