ISSN 1070-3284, Russian Journal of Coordination Chemistry, 2006, Vol. 32, No. 3, pp. 199–207. © Pleiades Publishing, Inc., 2006.
Original Russian Text © M.B. Bushuev, V.P. Krivopalov, N.V. Semikolenova, E.V. Peresypkina, A.V. Virovets, L.A. Sheludyakova, L.G. Lavrenova, V.A. Zakharov, S.V. Larionov,
2006, published in Koordinatsionnaya Khimiya, 2006, Vol. 32, No. 3, pp. 208–216.
A search for and study of new catalytic systems that
can be used in the target synthesis of polymers with the
required properties make an urgent task for researchers
[1–4]. Recently, a series of new Fe, Co, Ni, and V com-
plexes with the nitrogen-containing organic ligands
were used in combination with cocatalysts (methylalu-
) or trialkylaluminium compounds) as
efﬁcient catalysts in ethylene polymerization [5–10].
Nevertheless, the development of novel complexes of
the transition 3
metals that can be used as catalysts in
oleﬁn polymerization reactions is still of interest today.
The authors of  reported lately the catalytic activity
of the Fe(II) and Co(II) complexes with 2,6-di(pyr-
azole-1-yl)- and 2,6-di(pyrazole-1-ylmethyl)pyridines
in ethylene polymerization in the presence of MAO.
Also, the ﬁrst Cu catalysts of ethylene polymerization
were reported (the CuCl
complexes with bidentate
-diamine  and bis(benzimidazole)  ligands).
R = H, Me; M = Co, Fe;
n = 0, 1 
R = Ph,
-Pr  R =
; X = C(OMe)Me,
The structural aspects of the Cu(I) and Cu(II) com-
plexes with the nitrogen-containing ligands, which are
usually used in the radical atom-transfer polymeriza-
tion are discussed in .
In this connection, the synthesis of new Cu com-
plexes with the nitrogen-containing ligands incorporat-
ing heterocycles with several N atoms and the study of
their structures and catalytic activity in reactions of ole-
ﬁn polymerization are of unquestionable interest.
The aim of this work was to synthesize the Cu(II)
and Cu(I) complexes with a new nitrogen-containing
heterocyclic ligand, namely, 2-(3,5-diphenyl-1
Cu(II) and Cu(I) Complexes with
Synthesis and Structure. Catalytic Activity of Cu(II) Compounds
in Reaction of Ethylene Polymerization
M. B. Bushuev*, V. P. Krivopalov**, N. V. Semikolenova***, E. V. Peresypkina*,
A. V. Virovets*, L. A. Sheludyakova*, L. G. Lavrenova*, V. A. Zakharov***, and S. V. Larionov*
*Nikolaev Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent’eva 3,
Novosibirsk, 630090 Russia
**Novosibirsk Institute of Organic Chemistry, Siberian Division, Russian Academy of Sciences, Novosibirsk, Russia
***Boreskov Institute of Catalysis, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent’eva 3,
Novosibirsk, 630090 Russia
Received June 21, 2005
—The Cu(II) and Cu(I) complexes with 2-(3,5-diphenyl-1
(L) of the composition CuLX
(X = Cl, Br) and CuL(MeCN)Br are synthesized. According to X-ray diffraction
data, the complexes have molecular structures. The molecules L are coordinated to the copper atom in biden-
tate-cyclic mode, i.e., through the N
atom of pyrazole and N
atom of pyrimidine rings. The coordination poly-
hedron of the Cu
ion in CuLX
compounds is completed to a distorted tetrahedron with halide ions, that of
ion in CuL(MeCN)Br compounds, with the bromide ion and the nitrogen atom of acetonitrile molecule.
complexes (X = Cl, Br) in combination with cocatalysts (methylaluminoxane and triisobutylalu-
minium) exhibit catalytic activity in ethylene polymerization.