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Acta Cryst. (2008). E64, m1533    [ doi:10.1107/S1600536808036581 ]

catena-Poly[[[diiodidomercury(II)]-[mu]-N,N'-di-3-pyridylpyridine-2,6-dicarboxamide] dimethylformamide solvate]

L.-H. Huang, J. Wu and F.-F. Pan

Abstract top

In the title complex, {[HgI2(C17H13N5O2)]·C3H7NO}n, the Hg atom is coordinated by two I atoms and two N atoms from two different ligands in a distorted tetrahedral environment. Hg atoms are bridged by N,N'-di-3-pyridylpyridine-2,6-dicarboxamide ligands, forming a helical chain running along the a axis.

Comment top

The expansion of the field of metal-organic frameworks (MOFs) of predetermined structure depends on the judicious choice of new linkers and nodes of appropriate coordination algorithms. Rigid, polydentate N-donor ligands are typical linkers employed in such work. The rigid conjugated clamp-like multi-pyridine ligand N,N'-bis(pyridin-3-yl)-2,6-pyridinedicarboxamide, is a convenient bridging ligand for the synthesis of chain complexes. However, the previous work proved that the ligand also can form binuclear complex with 28-number ring (Huang et al.; 2004, Qin et al. 2003; Baer et al. 2002). We think, among the factors that induce the self-assembly processes with this ligand, the rotation of terminal pyridine groups plays a crucial role in deciding between binuclear versus. extended structures of the metal complexes. In this work, we selected this ligand as linker, generating a new helical chain coordination complex, {[HgI2(C17N5O2)](DMF)}n, (I), which is reported here. In compound (I) each Hg(II) atom is four-coordinated by two N atoms from two ligands and two I atoms in a distorted tetrahedral coordination sphere (Fig. 1). The Hg(II) atoms are bridged with N,N'-bis(pyridin-3-yl)-2,6-pyridinedicarboxamide ligands to form a helical chain running the a axis (Fig. 2).

In the crystal structure, the intermolecular N—H···N hydrogen bonds and the N—H···O hydrogen bonds arising from the DMF and ligand complete the structure.

Related literature top

For binuclear complexes of N,N'-bis(pyridin-3-yl)-2,6-pyridinedicarboxamide, see: Baer et al. (2002); Huang et al. (2008); Qin et al. (2003).

Experimental top

The ligand N,N'-bis(pyridin-3-yl)-2,6-pyridinedicarboxamide (0.05 mmol, 0.016 g) in DMF (5 ml) was added dropwise to a solution of HgI2 (0.1 mmol, 0.036 g) in methanol (3 ml). The precipitate was filtered and the resulting solution was allowed to stand at room temperature in the dark. After one week good quality colorless crystals were obtained from the filtrate and dried in air.

Computing details top

Data collection: CrystalClear (Rigaku/MSC, 2006); cell refinement: CrystalClear (Rigaku/MSC, 2006); data reduction: CrystalClear (Rigaku/MSC, 2006); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. View of the title complex, showing the labeling of the non-H atoms and 30% probability ellipsolids.
[Figure 2] Fig. 2. A view of the crystal packing along the c axis.
catena-Poly[[[diiodidomercury(II)]-µ-N,N'-di-3-\ pyridylpyridine-2,6-dicarboxamide] dimethylformamide solvate] top
Crystal data top
[HgI2(C17H13N5O2)]·C3H7NOF(000) = 3136
Mr = 846.81Dx = 2.224 Mg m−3
Orthorhombic, PbcaMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ac 2abCell parameters from 8721 reflections
a = 21.295 (4) Åθ = 3.2–26.0°
b = 9.7177 (19) ŵ = 8.56 mm−1
c = 24.440 (5) ÅT = 293 K
V = 5057.5 (17) Å3Prism, colorless
Z = 80.20 × 0.18 × 0.08 mm
Data collection top
Saturn724
diffractometer		4447 independent reflections
Radiation source: fine-focus sealed tube4250 reflections with I > 2σ(I)
graphiteRint = 0.073
Detector resolution: 28.5714 pixels mm-1θmax = 25.0°, θmin = 3.3°
dtprofit.ref scansh = −25→25
Absorption correction: numerical
(CrystalClear; Rigaku/MSC, 2006)		k = −11→11
Tmin = 0.279, Tmax = 0.548l = −29→29
48014 measured reflections
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.062Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.119H-atom parameters constrained
S = 1.31 w = 1/[σ2(Fo2) + (0.0319P)2 + 27.0127P]
where P = (Fo2 + 2Fc2)/3
4447 reflections(Δ/σ)max = 0.001
291 parametersΔρmax = 1.21 e Å−3
0 restraintsΔρmin = −0.92 e Å−3
Crystal data top
[HgI2(C17H13N5O2)]·C3H7NOV = 5057.5 (17) Å3
Mr = 846.81Z = 8
Orthorhombic, PbcaMo Kα radiation
a = 21.295 (4) ŵ = 8.56 mm−1
b = 9.7177 (19) ÅT = 293 K
c = 24.440 (5) Å0.20 × 0.18 × 0.08 mm
Data collection top
Saturn724
diffractometer		4447 independent reflections
Absorption correction: numerical
(CrystalClear; Rigaku/MSC, 2006)		4250 reflections with I > 2σ(I)
Tmin = 0.279, Tmax = 0.548Rint = 0.073
48014 measured reflectionsθmax = 25.0°
Refinement top
R[F2 > 2σ(F2)] = 0.062 w = 1/[σ2(Fo2) + (0.0319P)2 + 27.0127P]
where P = (Fo2 + 2Fc2)/3
wR(F2) = 0.119Δρmax = 1.21 e Å−3
S = 1.31Δρmin = −0.92 e Å−3
4447 reflectionsAbsolute structure: ?
291 parametersFlack parameter: ?
0 restraintsRogers parameter: ?
H-atom parameters constrained
Special details top

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.

Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Hg10.374277 (19)0.12855 (4)0.670365 (18)0.05404 (16)
I10.34375 (4)−0.02626 (8)0.58368 (3)0.0644 (2)
I20.44953 (4)0.13315 (9)0.75677 (3)0.0709 (3)
O10.8018 (3)0.4961 (8)0.6739 (3)0.069 (2)
O20.5375 (3)0.7089 (8)0.5249 (3)0.065 (2)
O30.5923 (3)0.2832 (8)0.6383 (3)0.063 (2)
N10.7739 (4)0.2015 (9)0.7954 (4)0.053 (2)
N20.7026 (3)0.4172 (9)0.6896 (3)0.050 (2)
H20.66490.42230.67720.060*
N30.6581 (3)0.5688 (8)0.6070 (3)0.0432 (18)
N40.5345 (3)0.5356 (8)0.5879 (3)0.0450 (19)
H40.55810.48740.60910.054*
N50.3933 (4)0.3479 (7)0.6244 (4)0.047 (2)
N60.5553 (4)0.0721 (9)0.6163 (4)0.053 (2)
C10.7230 (5)0.1535 (11)0.8191 (5)0.059 (3)
H10.72740.09230.84810.070*
C20.6634 (5)0.1903 (12)0.8027 (4)0.056 (3)
H2A0.62810.15510.82020.067*
C30.6576 (4)0.2814 (10)0.7594 (4)0.048 (2)
H50.61810.30910.74730.057*
C40.7112 (4)0.3301 (10)0.7344 (4)0.044 (2)
C50.7690 (4)0.2899 (10)0.7538 (4)0.049 (2)
H30.80530.32470.73770.059*
C60.7461 (5)0.4951 (11)0.6630 (4)0.051 (3)
C70.7196 (4)0.5800 (10)0.6170 (4)0.048 (2)
C80.7579 (5)0.6690 (12)0.5882 (5)0.061 (3)
H80.80050.67560.59620.073*
C90.7315 (5)0.7476 (13)0.5473 (5)0.067 (3)
H90.75640.80690.52680.081*
C100.6680 (5)0.7383 (11)0.5367 (4)0.057 (3)
H100.64930.79220.50990.068*
C110.6331 (4)0.6463 (10)0.5674 (4)0.044 (2)
C120.5642 (5)0.6341 (10)0.5573 (4)0.048 (2)
C130.4705 (4)0.5039 (9)0.5891 (4)0.042 (2)
C140.4245 (5)0.5696 (11)0.5587 (5)0.054 (3)
H140.43450.64450.53670.065*
C150.3633 (5)0.5216 (12)0.5618 (5)0.063 (3)
H150.33140.56480.54220.075*
C160.3505 (5)0.4110 (12)0.5937 (5)0.059 (3)
H160.30960.37740.59420.071*
C170.4519 (5)0.3943 (10)0.6222 (4)0.050 (3)
H170.48200.35160.64390.061*
C180.5424 (7)0.1046 (15)0.5597 (5)0.091 (4)
H18A0.49900.08630.55190.136*
H18B0.56830.04890.53650.136*
H18C0.55110.20010.55320.136*
C190.5445 (6)−0.0682 (12)0.6371 (6)0.081 (4)
H19A0.5770−0.12810.62390.121*
H19B0.5045−0.10080.62450.121*
H19C0.5450−0.06720.67630.121*
C200.5801 (4)0.1635 (10)0.6498 (4)0.047 (2)
H200.58910.13450.68520.057*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Hg10.0468 (3)0.0576 (3)0.0577 (3)−0.00017 (19)0.00731 (19)−0.0057 (2)
I10.0753 (5)0.0618 (5)0.0562 (5)−0.0038 (4)0.0088 (4)−0.0071 (4)
I20.0654 (5)0.0874 (6)0.0599 (5)−0.0060 (4)−0.0026 (4)−0.0047 (4)
O10.039 (4)0.085 (6)0.083 (6)−0.017 (4)−0.016 (4)0.029 (4)
O20.068 (5)0.063 (5)0.066 (5)−0.002 (4)−0.015 (4)0.024 (4)
O30.047 (4)0.058 (5)0.084 (6)−0.006 (4)−0.013 (4)0.012 (4)
N10.045 (5)0.055 (5)0.058 (6)−0.002 (4)−0.011 (4)0.010 (4)
N20.033 (4)0.057 (5)0.060 (5)−0.003 (4)−0.007 (4)0.017 (4)
N30.040 (4)0.044 (4)0.046 (5)−0.005 (4)0.000 (4)0.003 (4)
N40.044 (4)0.051 (5)0.040 (5)0.000 (4)−0.007 (4)0.013 (4)
N50.038 (4)0.037 (4)0.066 (6)0.000 (3)−0.007 (4)0.003 (4)
N60.049 (5)0.055 (5)0.054 (6)0.008 (4)−0.005 (4)−0.003 (4)
C10.044 (6)0.062 (7)0.070 (8)−0.005 (5)−0.001 (5)0.017 (6)
C20.045 (6)0.076 (7)0.046 (6)−0.010 (5)0.013 (5)0.010 (6)
C30.029 (5)0.055 (6)0.060 (7)−0.003 (4)−0.003 (4)0.004 (5)
C40.042 (5)0.044 (5)0.045 (6)0.001 (4)−0.005 (4)−0.002 (4)
C50.036 (5)0.054 (6)0.058 (6)0.000 (5)−0.007 (5)0.006 (5)
C60.042 (6)0.059 (6)0.051 (6)−0.007 (5)0.001 (5)0.011 (5)
C70.035 (5)0.055 (6)0.055 (6)−0.013 (5)0.003 (4)0.003 (5)
C80.044 (6)0.076 (7)0.062 (7)−0.020 (5)−0.002 (5)0.014 (6)
C90.062 (7)0.079 (8)0.061 (7)−0.022 (6)0.006 (6)0.022 (6)
C100.069 (7)0.053 (6)0.048 (6)−0.013 (5)−0.009 (5)0.013 (5)
C110.053 (6)0.049 (6)0.030 (5)−0.005 (5)0.000 (4)0.008 (4)
C120.059 (6)0.048 (6)0.037 (6)0.003 (5)−0.005 (5)0.005 (5)
C130.035 (5)0.047 (5)0.043 (5)0.008 (4)−0.008 (4)−0.004 (4)
C140.047 (6)0.049 (6)0.067 (7)0.007 (5)−0.003 (5)0.006 (5)
C150.060 (7)0.065 (7)0.063 (8)0.009 (6)−0.020 (6)0.008 (6)
C160.039 (5)0.065 (7)0.073 (8)0.004 (5)−0.007 (5)−0.003 (6)
C170.045 (6)0.047 (6)0.060 (7)0.005 (5)−0.007 (5)0.009 (5)
C180.110 (11)0.111 (12)0.052 (8)0.000 (9)−0.008 (7)−0.003 (8)
C190.081 (9)0.050 (7)0.111 (11)0.002 (6)0.006 (8)−0.011 (7)
C200.039 (5)0.046 (6)0.057 (6)0.009 (5)−0.005 (5)0.003 (5)
Geometric parameters (Å, °) top
Hg1—N1i2.403 (8)C3—H50.9300
Hg1—N52.444 (8)C4—C51.377 (12)
Hg1—I22.6514 (10)C5—H30.9300
Hg1—I12.6785 (10)C6—C71.504 (14)
O1—C61.215 (12)C7—C81.381 (14)
O2—C121.217 (11)C8—C91.380 (15)
O3—C201.225 (11)C8—H80.9300
N1—C11.314 (13)C9—C101.378 (14)
N1—C51.335 (12)C9—H90.9300
N1—Hg1ii2.403 (8)C10—C111.384 (13)
N2—C61.362 (12)C10—H100.9300
N2—C41.395 (12)C11—C121.492 (13)
N2—H20.8600C13—C141.387 (13)
N3—C71.336 (11)C13—C171.395 (13)
N3—C111.337 (11)C14—C151.387 (14)
N4—C121.370 (12)C14—H140.9300
N4—C131.396 (11)C15—C161.356 (16)
N4—H40.8600C15—H150.9300
N5—C171.327 (12)C16—H160.9300
N5—C161.330 (13)C17—H170.9300
N6—C201.318 (13)C18—H18A0.9600
N6—C181.445 (15)C18—H18B0.9600
N6—C191.473 (14)C18—H18C0.9600
C1—C21.379 (14)C19—H19A0.9600
C1—H10.9300C19—H19B0.9600
C2—C31.386 (14)C19—H19C0.9600
C2—H2A0.9300C20—H200.9300
C3—C41.378 (13)
N1i—Hg1—N592.9 (3)C9—C8—H8120.8
N1i—Hg1—I2104.8 (2)C7—C8—H8120.8
N5—Hg1—I2104.57 (19)C10—C9—C8119.9 (10)
N1i—Hg1—I1103.0 (2)C10—C9—H9120.0
N5—Hg1—I199.6 (2)C8—C9—H9120.0
I2—Hg1—I1141.83 (3)C9—C10—C11117.9 (10)
C1—N1—C5120.1 (9)C9—C10—H10121.0
C1—N1—Hg1ii118.3 (7)C11—C10—H10121.0
C5—N1—Hg1ii121.6 (6)N3—C11—C10122.8 (9)
C6—N2—C4128.5 (8)N3—C11—C12117.9 (8)
C6—N2—H2115.7C10—C11—C12119.3 (9)
C4—N2—H2115.7O2—C12—N4123.9 (9)
C7—N3—C11118.5 (8)O2—C12—C11121.3 (9)
C12—N4—C13128.1 (8)N4—C12—C11114.8 (8)
C12—N4—H4116.0C14—C13—C17117.5 (9)
C13—N4—H4116.0C14—C13—N4125.2 (9)
C17—N5—C16117.8 (9)C17—C13—N4117.3 (8)
C17—N5—Hg1118.0 (6)C13—C14—C15118.7 (10)
C16—N5—Hg1123.2 (7)C13—C14—H14120.6
C20—N6—C18121.6 (10)C15—C14—H14120.6
C20—N6—C19118.2 (10)C16—C15—C14119.2 (10)
C18—N6—C19120.1 (10)C16—C15—H15120.4
N1—C1—C2122.6 (10)C14—C15—H15120.4
N1—C1—H1118.7N5—C16—C15123.5 (10)
C2—C1—H1118.7N5—C16—H16118.3
C1—C2—C3118.1 (9)C15—C16—H16118.3
C1—C2—H2A121.0N5—C17—C13123.3 (9)
C3—C2—H2A121.0N5—C17—H17118.3
C4—C3—C2119.0 (9)C13—C17—H17118.3
C4—C3—H5120.5N6—C18—H18A109.5
C2—C3—H5120.5N6—C18—H18B109.5
C5—C4—C3119.4 (9)H18A—C18—H18B109.5
C5—C4—N2124.0 (9)N6—C18—H18C109.5
C3—C4—N2116.6 (8)H18A—C18—H18C109.5
N1—C5—C4120.9 (9)H18B—C18—H18C109.5
N1—C5—H3119.5N6—C19—H19A109.5
C4—C5—H3119.5N6—C19—H19B109.5
O1—C6—N2124.3 (9)H19A—C19—H19B109.5
O1—C6—C7121.7 (9)N6—C19—H19C109.5
N2—C6—C7114.0 (8)H19A—C19—H19C109.5
N3—C7—C8122.4 (10)H19B—C19—H19C109.5
N3—C7—C6117.4 (8)O3—C20—N6125.7 (10)
C8—C7—C6120.2 (9)O3—C20—H20117.2
C9—C8—C7118.4 (10)N6—C20—H20117.2
N1i—Hg1—N5—C17145.4 (8)C6—C7—C8—C9−178.4 (11)
I2—Hg1—N5—C1739.3 (8)C7—C8—C9—C101.3 (19)
I1—Hg1—N5—C17−110.8 (7)C8—C9—C10—C11−1.5 (18)
N1i—Hg1—N5—C16−46.3 (9)C7—N3—C11—C10−0.6 (15)
I2—Hg1—N5—C16−152.4 (8)C7—N3—C11—C12−179.1 (9)
I1—Hg1—N5—C1657.4 (8)C9—C10—C11—N31.2 (16)
C5—N1—C1—C20.2 (17)C9—C10—C11—C12179.7 (10)
Hg1ii—N1—C1—C2179.4 (9)C13—N4—C12—O2−1.3 (17)
N1—C1—C2—C30.2 (17)C13—N4—C12—C11177.4 (9)
C1—C2—C3—C40.5 (16)N3—C11—C12—O2174.3 (10)
C2—C3—C4—C5−1.5 (15)C10—C11—C12—O2−4.3 (15)
C2—C3—C4—N2177.5 (9)N3—C11—C12—N4−4.4 (13)
C6—N2—C4—C5−11.9 (17)C10—C11—C12—N4177.0 (9)
C6—N2—C4—C3169.2 (10)C12—N4—C13—C14−0.5 (16)
C1—N1—C5—C4−1.2 (15)C12—N4—C13—C17177.3 (10)
Hg1ii—N1—C5—C4179.6 (7)C17—C13—C14—C15−1.4 (15)
C3—C4—C5—N11.9 (15)N4—C13—C14—C15176.4 (10)
N2—C4—C5—N1−177.1 (9)C13—C14—C15—C16−1.0 (17)
C4—N2—C6—O12.9 (18)C17—N5—C16—C15−1.8 (17)
C4—N2—C6—C7−178.4 (9)Hg1—N5—C16—C15−170.1 (9)
C11—N3—C7—C80.3 (15)C14—C15—C16—N52.7 (19)
C11—N3—C7—C6178.0 (9)C16—N5—C17—C13−0.9 (15)
O1—C6—C7—N3177.9 (10)Hg1—N5—C17—C13168.1 (8)
N2—C6—C7—N3−0.9 (14)C14—C13—C17—N52.4 (15)
O1—C6—C7—C8−4.3 (17)N4—C13—C17—N5−175.6 (9)
N2—C6—C7—C8176.9 (10)C18—N6—C20—O33.1 (16)
N3—C7—C8—C9−0.7 (18)C19—N6—C20—O3179.3 (10)
Symmetry codes: (i) x−1/2, y, −z+3/2; (ii) x+1/2, y, −z+3/2.
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
N4—H4···O30.862.233.008 (10)150
N2—H2···O30.862.262.964 (10)139
Table 1
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
N4—H4···O30.862.233.008 (10)150
N2—H2···O30.862.262.964 (10)139
Acknowledgements top

The authors thanks Professor Hou Hong-Wei of Zhengzhou University for his help.

references
References top

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