ISSN 10703284, Russian Journal of Coordination Chemistry, 2015, Vol. 41, No. 2, pp. 142–148. © Pleiades Publishing, Ltd., 2015.
Exploration of new and efficient catalysts is impor
tant for organic industry and related fields [1–4]. In
recent years, much work indicated that metal com
plexes with various ligands have shown interesting cat
alytic properties on many organic reactions [5–10].
Schiff bases are readily coordinate to transition metal
complexes. Manganese complexes with Schiff bases
are effective catalysts for aerobic oxidation of olefins
[11–13]. So as to explore new catalysts for the oxida
tion of olefins, in the present work, two new mononu
clear manganese(III) complexes, [Mn(L)(NCS)] (
), where L is the
deprotonated form of
L), Hfac is
hexafluoroacetylacetonate, are presented.
Materials and measurements.
hyde, ethylene1,2diamine, ammonium thiocyanate
and bis(hexafluoroacetylacetonato)manganese were
purchased from Fluka and used as received. Manga
nese perchlorate was prepared by the reaction of man
ganese carbon in water, followed by recrystallization.
The article is published in the original.
The solvents used were of reagent grade. The Schiff
L was prepared according to the literature
method [14, 15]. Elemental analyses were carried out
using a PerkinElmer 2400 II elemental analyser. Infra
red spectra were recorded on a PerkinElmer FTIR
spectrophotometer with a KBr disc. GC analyses were
carried out using a Shimadzu GC2014C gas chro
matograph. The Xray diffraction was carried out on a
Bruker SMART 1000 CCD area diffractometer at
Synthesis of I.
L (3.04 g, 0.01 mol), ammonium
thiocyanate (0.760 g, 0.01 mol) and manganese per
chlorate (3.62 g, 0.01 mol) were dissolved and stirred
in methanol (50 mL). The mixture was stirred at room
temperature for 1 h and filtered. The filtrate was kept
still at room temperature for several days to give deep
brown blocklike single crystals. The yield was 53%.
): 3020–2820 w (C–H of ali
phatic and aromatic), 2033 s (NCS), 1613 s (C=N),
1580–1500 s (C=C), 1218 m (C–O).
anal. calcd., %: C, 49.17; H, 2.91; N, 10.12.
Found, %: C, 49.03; H, 3.02; N, 10.27.
Synthesis, Structures, and Catalytic Property of Manganese(III)
Complexes Derived from
G. S. Li* and H. L. Zhang
Key Laboratory of Surface & Interface Science of Henan, School of Material & Chemical Engineering,
Zhengzhou University of Light Industry, Zhengzhou, 450002 P.R. China
Received June 19, 2014
—Two mononuclear manganese(III) complexes, [Mn(L)(NCS)] (
) and [Mn(L)(OH
), where L is the deprotonated form of
diamine, Hfac is hexafluoroacetylacetonate, were prepared and characterized by elemental analysis, IR spec
tra and single crystal Xray determination (CIF files CCDC nos. 1008309 (
), 1008310 (
)). The Mn atoms
in both complexes are in octahedral coordination. Complex
crystallized in orthorhombic space group
with unit cell dimensions
= 19.4637(7) Å,
= 3271.0(2) Å
= 0.0922. Complex
crystallized in triclinic space group with unit cell dimensions
= 13.5522(7) Å,
= 0.1421. In the crystal structure of
, the complex molecules are stack
interactions along the
axis. In the crystal structure of
, the molecules are linked through intermo
O hydrogen bonds, to form chains along the
axis. The catalytic oxidation on olefins of the
complexes was studied.