Tetrahedral complexes of zinc(II) chloride with N- and O-containing organic ligands: Synthesis and crystal structures of [ZnCl2(C 12H12N2O)] and [ZnCl2(H 2O)2](Me4Pyz)

Article abstract of DOI:10.1134/S0036023609100167

New complex chlorides [ZnCl₂(ODA)] (I) (ODA=oxydianiline, C ₁₂H₁₂N₂O) and [ZnCl₂(H ₂O)₂](Me₄Pyz)₂ (II) (Me ₄Pyz = 2,3,5,6-tetramethylpyrazine) we

Full text of DOI:10.1134/S0036023609100167

ISSN 0036-0236, Russian Journal of Inorganic Chemistry, 2009, Vol. 54, No. 10, pp. 1603–1610. © Pleiades Publishing, Inc., 2009.
Original Russian Text © Yu.V. Kokunov, Yu.E. Gorbunova, V.V. Kovalev, 2009, published in Zhurnal Neorganicheskoi Khimii, 2009, Vol. 54, No. 10, pp. 1678–1685.
COORDINATION COMPOUNDS
Tetrahedral Complexes of Zinc(II) Chloride
with N- and O-Containing Organic Ligands:
Synthesis and Crystal Structures
of [ZnCl2(C12H12N2O)] and [ZnCl2(H2O)2](Me4Pyz)2
Yu. V. Kokunov, Yu. E. Gorbunova, and V. V. Kovalev
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia
Received April 14, 2009
Abstract—New complex chlorides [ZnCl2(ODA)] (I) (ODA=oxydianiline, C12H12N2O) and
[ZnCl2(H2O)2](Me4Pyz)2 (II) (Me4Pyz = 2,3,5,6-tetramethylpyrazine) were synthesized and crystallographically
characterized. Crystals of I are monoclinic, space group C2/c, a = 22.682(2) Å, b = 12.646(1) Å, c = 9.951(1)
Å, β = 93.23(2)°, V = 2849.7(5) Å3, ρcalc = 1.569 g/cm3, Z = 8. Structure I contains cyclic fragments consisting
of two tetrahedral complexes (ZnCl2N2) and two coordinated bridging oxydianiline ligands. Crystals of II are
monoclinic, space group P2(1)/c, a = 8.972(2) Å, b = 13.862(3) Å, c = 17.528(4) Å, β = 101.72(3)°, V =
2134.5(7) Å3, ρcalc = 1.384 g/cm3, Z = 4. In structure II, supramolecular pseudo-metallocycles are formed due
to formation of hydrogen bonds O(w)–H···N between coordinated water molecules and noncoordinated nitro-
gen atoms of tetramethylpyrazine molecules.
DOI: 10.1134/S0036023609100167
The chemistry of coordination polymers and
Compounds with Zn contain predominantly tetrahe-
supramolecular compounds attract permanently dral complexes, whereas Cd compounds are character-
increasing interest. Analysis and understanding of ized by higher coordination numbers [2, 3]. Synthesis
intra- and intermolecular interactions in crystals are and structure of tetrahedral and octahedral discrete
important when for their use in synthesis of new com- coordination polymeric and supramolecular com-
pounds with potentially useful properties. Synthesis of pounds of Zn(II) were considered, for example, for
such samples is often based on self-assembly of corre- ZnCl2(4-R-Py)2 (R = vinyl, acetyl, or cyano substitute),
sponding building units, resulting in coordination poly-
mers and supramolecular assemblies due to covalent
and hydrogen bonds other weak interactions. In coordi-
nation polymers, organic ligands are usually bound to
metal ions by donor–acceptor bonds to form rigid
frameworks, while weak intermolecular interactions
give a possibility to obtain nonrigid assemblies.
ZnBr2(pyrimidine), and others [4–7].
The aim of this work is to obtain two complex com-
pounds of zinc chloride with nitrogen-containing
ligands, namely, [ZnCl2(ODA)] (I) (ODA = oxydi-
aniline, C12H12N2O) and [ZnCl2(H2O)2](Me4Pyz)2 (II)
(Me4Pyz = 2,3,5,6-tetramethylpyrazine) and determine
their structures.
To synthesize coordination and supramolecular
compounds, salts of divalent cations (Zn, Cd, Ni, Co)
and N- and O-containing organic ligands of various
lengths, functionalities, and electronic structures are
often used. In that way, different structural composi-
tions in the form of chains, bands, rings, and 2D and 3D
polymers were obtained. Formation of supramolecular
pseudo-metallocycles is characteristic of compounds of
divalent cations when water molecules enter the coordi-
nation sphere together with ditope nitrogen-containing
ligands. When weak hydrogen bonds are involved in
bonding, nonrigid supramolecular structures are
formed, for example, in the compound [Co(2-
MePyz)2(H2O)4](NO3)2 [1].
EXPERIMENTAL
Syntheses of compounds I and II were performed
by similar procedures with the use of Aldrich and Fluka
reagents. To obtain I, zinc chloride of analytical grade
and 2,2'-oxydianiline taken in a 1 : 2 ratio were sepa-
rately dissolved in isopropanol; then, the solutions were
mixed and allowed to evaporate at room temperature
for several days. The resulting crystals were filtered off,
rapidly washed with a small amount of isopropanol,
and dried in air.
According to the chemical analysis data, the major-
ity of crystals had the chemical composition
1603

1604
KOKUNOV et al.
C12)
C(11)
C(10)
C(9)
C(8)
C(6)
C(4)
C(3)
C(7)
C(5)
O(1)
N(2)
C(2)
C(1)
N(1)
Cl(2)
Zn(1)
Cl(1)
Fig. 1. Cyclic fragment in structure I.
[ZnCl2(ODA)2], whereas single crystals suitable for X-
ray crystallography formed in a small amount had the
1 : 1 composition.
For C12H12Cl2N2OZn (I) anal. calc. (wt %):
C, 42.79; N, 8.32; H, 3.56.
Found (wt %): C, 43.12; N, 8.08; H, 3.92.
Note that the synthesis in ethyl alcohol gave analo-
gous results.
For the synthesis of crystals II, ZnCl2 and Me4Pyz
taken in a 1 : 2 ratio were separately dissolved in etha-
nol, and then the solutions were mixed and allowed to
at room temperature to slowly evaporate. The resulting
crystals were filtered off, washed, and dried in air.
For C16H28Cl2N4O2Zn (II) anal. calc. (wt %):
C, 43.17; N, 12.59; H, 6.29.
X-ray crystallography. Experimental data for crys-
tals I an II were obtained on an Enraf-Nonius auto-
mated CAD4 diffractometer. The structures were
solved by the heavy-atom method and refined by full-
matrix least-squares calculation in anisotropic approxi-
mation for all non-hydrogen atoms. Positions of hydro-
gen atoms were calculated from geometric consider-
ations and refined as riding on their bonded atoms with
fixed isotropic thermal parameters. The hydrogen
atoms of water molecules were located from a differ-
ence Fourier synthesis.
Crystallographic data and basic experimental details
for structures I and II are listed in Table 1; atomic coor-
dinates and thermal parameters are presented in
Table 2; selected bond lengths and bond angles are pre-
sented in Table 3; and geometric parameters of hydro-
gen bonds are shown in Table 4. All calculations were
performed with the SHELXL-97 program package.
Found (wt %): C, 43.49; N, 12.36; H, 6.16.
IR spectra of the ligands and complexes were
recorded as mineral oil mulls on KBr plates on a
Specord 75 IR spectrophotometer in a range of 4000–
400 cm–1. The IR spectra of I and II show the bands of
the corresponding coordinated ligands. The spectrum of
II contains also a broad strong band due to the ν(é–ç)
RESULTS AND DISCUSSION
The structure of I contains centrosymmetric cyclic
fragments consisting of two tetrahedral complexes of
vibrations of water shifted to 2900 cm–1, which is indic- zinc chloride with nitrogen atoms of two bridging oxy-
ative of the presence of hydrogen bonds.
dianiline ligands (Fig. 1). The Zn–Cl and Zn–N dis-
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY Vol. 54 No. 10 2009

TETRAHEDRAL COMPLEXES OF ZINC(II)
1605
Table 1. Crystallographic data and experimental details for structures I and II
I
II
FW
336.51
444.69
Crystal dimensions, mm
0.10 × 0.15 × 0.23
0.15 × 0.20 × 0.24
Crystal system
Monoclinic
Space group
C2/c
P2(1)/c
Unit cell parameters:
a, Å
b, Å
c, Å
β, deg
V, Å3
Z
22.682(2)
12.646(1)
9.951(1)
93.23(2)
2849.7(5)
8
8.972(2)
13.862(3)
17.528(4)
101.72(3)
2134.5(7)
4
ρ
calc, g/cm3
1.569
1.384
µCu, mm–1
5.757
4.034
F(000)
1360
928
Temperature, K
293
Radiation (λ, Å)
CuKα (1.54178), graphite monochromator
Scan mode
ω
θ range, deg
3.90–70.84
4.10–59.95
Index ranges
–27 ≤ h ≤ 27, –15 ≤ k ≤ 15, –12 ≤ l ≤ 0 –10 ≤ h ≤ 9, 0 ≤ k ≤ 15, 0 ≤ l ≤ 19
Number of measured reflections
Number of unique reflections
Number of observed reflections with I ≥ 2σ(I)
Number of refined parameters
GOOF on F2
5687
2755 [R(int) = 0.0171]
2335
3068
2959 [R(int) = 0.0242]
2324
164
227
0.816
0.985
R (I ≥ 2σ(I))
R1 = 0.0248, wR2 = 0.0872
R1 = 0.0333, wR2 = 0.0949
0.00075(8)
R1 = 0.0329, wR2 = 0.1056
R1 = 0.0501, wR2 = 0.1179
0.0061(5)
R for all reflections
Extinction coefficient
Residual electron density
(max/min), e/Å3
0.350/–0.250
0.368/–0.367
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY Vol. 54 No. 10 2009

1606
KOKUNOV et al.
Table 2. Atomic coordinates and thermal parameters (Ueq = 1/3ΣUij) for structures I and II
Atom
x
y
z
Ueq, Å2
Atom
x
y
z
Ueq, Å2
I
C(3)
0.7311(3) 0.2017(2) 0.3097(2) 0.054(1)
0.6084(3) 0.3309(2) 0.3522(2) 0.050(1)
0.7071(3) 0.3254(2) 0.4247(2) 0.049(1)
0.6905(4) 0.3908(3) 0.4908(2) 0.068(1)
0.8329(3) 0.1988(2) 0.3806(2) 0.050(1)
0.9617(4) 0.1278(3) 0.3979(2) 0.070(1)
–0.2830(3) 0.5230(2) 0.1708(2) 0.048(1)
–0.1118(3) 0.4835(2) 0.2840(2) 0.047(1)
0.0677(3) 0.3415(3) 0.2832(2) 0.061(1)
–0.0462(4) 0.5073(3) 0.3674(2) 0.067(1)
–0.3945(4) 0.5931(3) 0.1276(2) 0.066(1)
0.4876(4) 0.4066(3) 0.3345(2) 0.071(1)
–0.3181(4) 0.4097(3) 0.0550(2) 0.072(1)
0.7407(4) 0.1336(3) 0.2441(2) 0.077(1)
Zn(1)
Cl(1)
Cl(2)
N(1)
N(2)
O(1)
C(1)
C(2)
C(3)
C(4)
C(5)
C(6)
C(7)
C(8)
C(9)
C(10)
0.2902(1) 0.9335(1) –0.0113(1) 0.042(1)
0.3352(1) 1.0840(1) –0.0567(1) 0.060(1)
0.2649(1) 0.8344(1) –0.1913(1) 0.052(1)
0.2141(1) 0.9736(2) –0.0859(2) 0.046(1)
0.1619(1) 0.6549(1) –0.1281(2) 0.043(1)
0.1334(1) 0.8466(1) –0.0314(2) 0.059(1)
0.1706(1) 1.0172(2) –0.0090(2) 0.047(1)
0.1722(1) 1.1236(2) –0.0438(3) 0.063(1)
0.1295(1) 0.9506(2) –0.0724(2) 0.050(1)
0.0904(1) 0.9885(3) –0.1725(3) 0.066(1)
0.1324(1) 1.1615(2) –0.1410(4) 0.078(1)
0.0919(1) 1.0959(3) –0.2050(3) 0.081(1)
0.0869(1) 0.7771(2) –0.0532(2) 0.050(1)
0.0291(1) 0.8017(3) –0.0258(3) 0.071(1)
0.1017(1) 0.6774(2) –0.0972(2) 0.045(1)
0.0589(1) 0.5998(2) –0.1084(3) 0.062(1)
C(4)
C(5)
C(6)
C(7)
C(8)
C(9)
C(10)
C(11)
C(12)
C(13)
C(14)
C(15)
C(16)
H(6A)
H(6B)
H(6C)
H(8A)
H(8B)
H(8C)
0.769
0.593
0.701
1.018
1.028
0.921
0.376
0.382
0.457
0.138
0.136
0.063
0.292
0.313
0.380
0.563
0.518
0.453
0.645
0.561
0.618
0.398
0.469
0.400
0.351
0.459
0.400
0.147
0.068
0.140
0.248
0.030
0.155
0.222
0.535
0.503
0.476
0.450
0.362
0.394
0.247
0.330
0.296
0.382
0.374
0.400
0.162
0.109
0.084
0.282
0.340
0.370
0.042
0.019
0.053
0.200
0.261
0.229
0.047
0.106
0.215
0.220
C(11) –0.0137(1) 0.7240(3) –0.0415(3) 0.076(1)
C(12)
0.0014(1) 0.6237(3) –0.0802(3) 0.073(1)
H(1A)
H(1B)
H(2A)
H(2B)
H(3A)
H(4A)
H(5A)
H(6A)
H(8A)
0.199
0.223
0.181
0.161
0.200
0.064
0.133
0.065
0.019
0.916
1.021
0.717
0.621
1.169
0.943
1.233
1.123
0.869
0.532
0.740
0.571
0.125
0.151
H(11A) 0.083
H(11B) 0.046
H(11C) 0.159
H(12A) –0.096
H(12B) 0.061
H(12C) –0.064
H(13A) –0.409
H(13B) –0.491
H(13C) –0.358
H(14A) 0.432
H(14B) 0.533
H(14C) 0.419
H(15A) –0.273
H(15B) –0.305
H(15C) –0.424
H(16A) 0.660
H(16B) 0.730
H(16C) 0.837
H(1w) –0.045
H(2w) –0.046
–0.138
–0.208
–0.002
–0.217
–0.164
–0.271
0.003
H(10A) 0.069
H(11A) –0.053
H(12A) –0.027
–0.135
–0.026
–0.087
II
Zn(1)
Cl(2)
Cl(3)
O(1w)
O(2w)
N(1)
0.2323(1) 0.2657(1) 0.0913(1) 0.048(1)
0.2920(1) 0.4187(1) 0.1108(1) 0.079(1)
0.2759(1) 0.1787(1) –0.0065(1) 0.081(1)
0.0083(2) 0.2520(2) 0.0882(1) 0.053(1)
0.3297(2) 0.2040(2) 0.1917(1) 0.067(1)
0.6192(3) 0.2675(2) 0.2961(2) 0.053(1)
–0.1293(2) 0.3836(2) 0.1726(1) 0.048(1)
0.8178(3) 0.2593(2) 0.4375(2) 0.047(1)
–0.2196(2) 0.5418(2) 0.2451(1) 0.049(1)
–0.2409(3) 0.4397(2) 0.1353(2) 0.048(1)
–0.0626(3) 0.4046(2) 0.2463(2) 0.044(1)
N(2)
N(3)
N(4)
H(3w)
H(4w)
0.300
0.417
C(1)
C(2)
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY Vol. 54 No. 10 2009

TETRAHEDRAL COMPLEXES OF ZINC(II)
Table 3. Bond lengths (d) and bond angles (ω) in structures I and II
1607
Bond
d, Å
Bond
d, Å
Bond
d, Å
Bond
d, Å
I
II
Zn(1)–N(2)#1
Zn(1)–N(1)
Zn(1)–Cl(1)
Zn(1)–Cl(2)
N(1)–C(1)
O(1)–C(3)
O(1)–C(7)
C(1)–C(3)
C(1)–C(2)
C(2)–C(5)
C(3)–C(4)
2.045(2)
2.088(2)
C(4)–C(6)
C(5)–C(6)
1.396(5) Zn(1)–O(2)
1.368(5) Zn(1)–O(1)
1.383(3) Zn(1)–Cl(3)
1.390(3) Zn(1)–Cl(2)
1.383(4) N(1)–C(3)
1.380(3) N(1)–C(4)
1.446(2) N(2)–C(1)
1.382(4) N(2)–C(2)
1.374(4) N(3)–C(7)
N(3)–C(5)
1.991(2)
2.008(2)
2.196(1)
2.197(1)
1.342(4)
1.338(4)
1.330(4)
1.340(4)
1.331(4)
1.337(4)
1.336(4)
1.337(4)
C(1)–C(9)
C(1)–C(15)
C(2)–C(10)
C(2)–C(11)
C(3)–C(7)
C(3)–C(16)
C(4)–C(5)
C(4)–C(14)
C(5)–C(6)
C(7)–C(8)
C(9)–C(13)
C(10)–C(12)
1.400(4)
1.495(4)
1.395(4)
1.498(4)
1.385(4)
1.504(5)
1.395(4)
1.496(4)
1.502(5)
1.500(4)
1.487(4)
1.497(4)
2.2189(6) C(7)–C(9)
2.2341(6) C(7)–C(8)
1.436(3)
1.379(3)
1.381(2)
1.383(3)
1.391(3)
1.371(4)
1.382(3)
C(8)–C(11)
C(9)–C(10)
C(9)–N(2)
C(10)–C(12)
C(11)–C(12)
N(4)–C(10)
N(4)–C(9)
Angle
ω, deg
Angle
ω, deg
N(2)#1Zn(1)N(1) 103.87(7) C(3)C(4)C(6)
N(2)#1Zn(1)Cl(1) 111.97(5) C(6)C(5)C(2)
118.7(3)
120.9(3)
Angle
ω, deg
Angle
ω, deg
O(2)Zn(1)O(1) 103.93(10) N(1)C(3)C(16)
116.6(3)
122.6(3)
120.5(3)
117.7(3)
121.8(3)
120.2(3)
118.1(3)
121.7(3)
120.3(3)
117.0(3)
122.7(3)
119.6(3)
118.5(3)
121.8(3)
119.9(3)
N(1)Zn(1)Cl(1)
N(2)#1Zn(1)Cl(2) 109.84(5) O(1)C(7)C(9)
N(1)Zn(1)Cl(2) 109.05(5) O(1)C(7)C(8)
Cl(1)Zn(1)Cl(2) 114.74(3) C(9)C(7)C(8)
106.72(5) C(5)C(6)C(4)
120.5(3) O(2)Zn(1)Cl(3) 109.76(9)
115.6(2) O(1)Zn(1)Cl(3) 105.24(7)
123.2(2) O(2)Zn(1)Cl(2) 103.16(8)
121.0(2) O(1)Zn(1)Cl(2) 107.87(6)
118.8(3) Cl(3)Zn(1)Cl(2) 125.11(5)
C(7)C(3)C(16)
N(1)C(4)C(5)
N(1)C(4)C(14)
C(5)C(4)C(14)
N(3)C(5)C(4)
N(3)C(5)C(6)
C(4)C(5)C(6)
N(3)C(7)C(3)
N(3)C(7)C(8)
C(3)C(7)C(8)
N(4)C(9)C(1)
N(4)C(9)C(13)
C(1)C(9)C(13)
N(4)C(10)C(2)
C(1)N(1)Zn(1)
C(3)O(1)C(7)
C(3)C(1)C(2)
C(3)C(1)N(1)
C(2)C(1)N(1)
C(5)C(2)C(1)
O(1)C(3)C(4)
O(1)C(3)C(1)
C(4)C(3)C(1)
110.1(1)
121.6(2)
120.1(2)
119.2(2)
120.6(2)
119.3(3)
124.9(2)
114.5(2)
120.5(2)
C(11)C(8)C(7)
C(10)C(9)C(7)
C(10)C(9)N(2)
C(7)C(9)N(2)
119.4(2) C(3)N(1)C(4)
120.8(2) C(1)N(2)C(2)
119.8(2) C(7)N(3)C(5)
118.6(3)
119.5(3)
119.4(2)
C(9)N(2)Zn(1)#1 115.8(1) C(10)N(4)C(9) 120.0(3)
C(9)C(10)C(12)
C(12)C(11)C(8)
119.7(3) N(2)C(1)C(9)
120.5(3)
120.3(2) N(2)C(1)C(15) 117.4(3)
C(11)C(12)C(10) 120.7(2) C(9)C(1)C(15) 122.2(3)
N(2)C(2)C(10) 120.3(2)
N(2)C(2)C(11) 116.5(3)
C(10)C(2)C(11) 123.2(3)
N(4)C(10)C(12) 117.7(3)
C(2)C(10)C(12) 122.4(3)
N(1)C(3)C(7)
120.8(3)
#1
Symmetry codes: –x + 1/2, –y + 3/2, –z.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY Vol. 54 No. 10 2009

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KOKUNOV et al.
Table 4. Geometric parameters of hydrogen bonds in structures I and II
A···B
A–H
Å
H···B
Bond A–H···B
Position of B atom
Angle AHB, deg
I
2.656(2)
3.443(2)
2.700(2)
3.266(2)
II
N(1)–H(1A)···O(1) x, y, z
0.90
0.90
0.90
0.90
2.27
2.56
2.26
2.40
106
169
110
162
N(1)–H(1B)···Cl(2) x, 2 – y, 1/2 + z
N(2)–H(2A)···O(1) x, y, z
N(2)–H(2B)···Cl(1) 1/2 – x, –1/2 + y, –1/2 – z
O(1)–H(1)···N(3)
O(1)–H(2)···N(3)
O(2)–H(3)···N(4)
O(2)–H(4)···N(1)
–1 – x, 1/2 – y, –1/2 – z
x, y, z
2.844(3)
2.791(3)
2.775(3)
2.990(3)
0.79
0.87
0.86
0.87
2.06
1.94
1.92
2.12
179
165
173
174
–x, 1/2 + y, 1/2 – z
x, y, z
tances in the distorted ZnCl2N2 tetrahedron have aver- ecules and the nitrogen atoms of the Me4Pyz molecules
(Fig. 2). The conjugated rings form the supramolecular
framework containing channels with dimensions
14.83 × 15.57 Å (distances between the Zn atoms) with
methyl groups directed inward the channels (Fig. 3).
In compound I, the ring is formed by donor–accep-
tor bonds. The long enough distance between the nitro-
gen atoms in oxydianiline (N(1)···N(2) 4.680(3) Å) does
not allow the ligand to act as a chelate; therefore, this
age values 2.227 Å and 2.067 Å, respectively. The
angles at zinc atoms vary in a range of 103.87(7)°–
114.74(3)° (Table 3). The ring containing two zinc
atoms and two oxydianiline molecules has dimensions
4.995(1) Å (the Zn(1)···Zn(1A) distance) × 5.827(2) Å
(the O(1)···O(1A) distance between oxygen atoms of
two ligands). The rings are linked by hydrogen bonds
N–H···Cl to form a supramolecular framework. The
NH2 groups of oxydianiline also form hydrogen bonds ligand forms the bridge between the symmetrically
bound zinc atoms.
N–H···O within the rings (Table 4).
In compound II, the supramolecular pseudo-metal-
locycles are formed due to the hydrogen bonds between
the O atoms of the coordinated water molecules of the
complex [ZnCl2(H2O)2] and the N atoms of tetramethyl-
pyrazine. These rings, in contrast to the rings in I, are
nonrigid.
In structure II, two Cl atoms (Zn–Clav, 2.197 Å) and
two oxygen atoms of the water molecules (Zn–Oav, 2.00 Å)
form the tetrahedral coordination sphere of the zinc
atom. The angles at the Zn atom deviate considerably
from the ideal tetrahedral angle (109.5°) and lie within
the range of 103.9(1)°–125.11(5)° (Table 3). Noncoordi-
nated tetramethylpyrazine molecules act as bridges
between adjacent complexes of Zn2+ and produce cen-
trosymmetric pseudo-metallocycles due to formation
ACKNOWLEDGMENTS
This work was supported by the basic research pro-
of hydrogen bonds O(w)–H···N between the water mol- gram of the Presidium of the RAS “Development of the
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY Vol. 54 No. 10 2009

TETRAHEDRAL COMPLEXES OF ZINC(II)
1609
C(8)
C(7)
N(3)
C(3)
C(16)
C(6)
C(5)
N(1)
C(4)
C(14)
Cl(2)
Cl(1)
O(2)
N(4A)
C(11)
C(2)
Zn(1)
O(1)
N(2)
C(12)
C(10)
N(4)
N(3A)
C(1)
C(15)
C(9)
C(13)
Fig. 2. Supramolecular pseudo-metallocycle in structure II (symmetry codes: –1 + x, 1/2 – y, –1/2 + z for N(3A) and –x, –1/2 + y,
1/2 – z for N(4A)).
a
c
0
b
Fig. 3. General view of structure II along the [100] direction.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY Vol. 54 No. 10 2009

1610
KOKUNOV et al.
3. C. Hu, Q. Li, and U. Englert, CrystEngComm. 5 (94),
Methods of Synthesis of Chemical Substances and Cre-
ating of New Materials,” project no. 18P13.
519 (2003).
4. W. L. Steffen and G. J. Palenik, Inorg. Chem. 16 (5),
1119 (1977).
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RUSSIAN JOURNAL OF INORGANIC CHEMISTRY Vol. 54 No. 10 2009