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In the structure of the title compound, [Ni2(N3)4(C5H5N)4]n, neutral chains of NiII atoms are bridged alternately by double end-on and double end-to-end azide bridges. Each NiII center is located on a crystallographic general position and in a slightly distorted octa­hedral coordination environment with two pyridine ligands in the trans positions. Both end-on and end-to-end double azide bridges become equivalent because of the inversion centers lying between each pair of adjacent NiII atoms. In the chain, the Ni...Ni separations across the end-on and end-to-end azide bridges are 3.236 (4) and 4.975 (4) Å, respectively, and the end-on azide bridging Ni—N—Ni angle is 100.8 (2)°.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807058485/si2051sup1.cif
Contains datablocks global, I

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S1600536807058485/si2051Isup2.hkl
Contains datablock I

CCDC reference: 672692

Key indicators

  • Single-crystal X-ray study
  • T = 293 K
  • Mean [sigma](C-C) = 0.010 Å
  • R factor = 0.060
  • wR factor = 0.164
  • Data-to-parameter ratio = 14.7

checkCIF/PLATON results

No syntax errors found



Alert level C PLAT062_ALERT_4_C Rescale T(min) & T(max) by ..................... 0.89 PLAT094_ALERT_2_C Ratio of Maximum / Minimum Residual Density .... 3.83 PLAT154_ALERT_1_C The su's on the Cell Angles are Equal (x 10000) 3000 Deg. PLAT242_ALERT_2_C Check Low Ueq as Compared to Neighbors for N4 PLAT341_ALERT_3_C Low Bond Precision on C-C Bonds (x 1000) Ang ... 10
Alert level G ABSTM02_ALERT_3_G When printed, the submitted absorption T values will be replaced by the scaled T values. Since the ratio of scaled T's is identical to the ratio of reported T values, the scaling does not imply a change to the absorption corrections used in the study. Ratio of Tmax expected/reported 0.887 Tmax scaled 0.887 Tmin scaled 0.810 PLAT199_ALERT_1_G Check the Reported _cell_measurement_temperature 293 K PLAT200_ALERT_1_G Check the Reported _diffrn_ambient_temperature . 293 K PLAT794_ALERT_5_G Check Predicted Bond Valency for Ni1 (2) 1.95
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 5 ALERT level C = Check and explain 4 ALERT level G = General alerts; check 3 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 2 ALERT type 2 Indicator that the structure model may be wrong or deficient 2 ALERT type 3 Indicator that the structure quality may be low 1 ALERT type 4 Improvement, methodology, query or suggestion 1 ALERT type 5 Informative message, check
checkCIF publication errors
Alert level A PUBL023_ALERT_1_A There is a mismatched ^ on line 86 [bis(pyridine-\kN)nickel(II)]-di-\m-azido-\k^4^N^1^:N^1] If you require a ^ then it should be escaped with a \, i.e. \^ Otherwise there must be a matching closing ~, e.g. ^12^C PUBL023_ALERT_1_A There is a mismatched ^ on line 255 [bis(pyridine-\kN)nickel(II)]-di-\m-azido-\k^4^N^1^:N^1] If you require a ^ then it should be escaped with a \, i.e. \^ Otherwise there must be a matching closing ~, e.g. ^12^C
2 ALERT level A = Data missing that is essential or data in wrong format 0 ALERT level G = General alerts. Data that may be required is missing

Comment top

Azido-NiII compounds with mono-N donored pyridine based co-ligands have been investigated early with respect to their metal-to-ligand π-bonding features (Nelson & Shepherd, 1965), magnetic circular dichroism and crystal field (Schreiner & Hamm, 1973). Recently, the crystal structures of two relative compounds, {[Ni(4-ethylpyridine)4(N3)].(PF6)}n (Goher et al., 2002) and [Ni(pyridine)2(N3)2] (Liu et al., 2006) have been reported. The former has a single end-to-end azido-bridged cationic chain structure, but the latter is mono-nuclear. Different from them, the title compound, [Ni2(C5H5N)4(N3)4]n has a neutral chain structure of NiII atoms bridged alternately by double end-on and double end-to-end azido bridges.

As shown in Fig. 1, the NiII center located at the crystallographically general position is coordinated by four azido N and two pyridine N atoms in a slightly distorted octahedral environment, in which two pyridine ligands lie in the trans positions. Both end-on and end-to-end double azido bridges become equivalent because of the inversion centers lied on between each two adjacent NiII atoms, respectively. Based on the (Ni1—N3—Ni1A—N3A) plane, the out-of-plane deviation of the N3—N4—N5 group is ca 14.1 (4) °, and the dihedral angles between the mean plane and two pyridyl rings are 99.7 (4) ° for (C1—C5—N1) and 82.9 (4) ° for (C6—C10—N2), respectively. The end-to-end azido-bridged dinuclear unit has a chair configuration with the dihedral angle between the (N6—Ni1—N8B) and (N6—N8—N6B—N8B) mean plane is 143.5 (4) °. In the chain, the Ni—Ni distances across the end-on and end-to-end azido bridges are 3.236 (4) and 4.975 (4) Å, respectively, and the end-on azido bridging Ni1—N3—Ni1A angle is 100.8 (2) °. In addition, in the crystal structure such chains arrange in parallel along the a direction to finish the three-dimensional packing (Fig. 2).

Related literature top

For related literature, see: Goher et al. (2002); Liu et al. (2006); Nelson & Shepherd (1965); Schreiner & Hamm (1973).

Experimental top

A mixture of NiCl2.6H2O (24 mg, 0.1 mmol), NaN3 (26 mg, 0.4 mmol) and pyridine (20 mg, 0.25 mmol) in 10 ml of water was sealed in a Teflon-lined stainless-steel Parr bomb that was heated at 413 K for 48 h. Green crystals of the title compound were collected after the bomb was allowed to cool to room temperature spontaneously. Yield, 10% with respect to Cu(II). Caution: Azide is potentially explosive, especially in a hydrothermal manipulation. Although we have met no problems in this work, only a small amount of them should be prepared and handled with great caution.

Refinement top

H atoms were included in calculated positions and treated in the subsequent refinement as riding atoms, with C—H = 0.93 Å and Uiso(H) = 1.2 Ueq(C, N).

Computing details top

Data collection: SMART (Bruker, 1998); cell refinement: SMART (Bruker, 1998); data reduction: SHELXTL (Bruker, 1998); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Bruker, 1998); software used to prepare material for publication: SHELXTL (Bruker, 1998).

Figures top
[Figure 1] Fig. 1. one-dimensional chain structure of the title compound with 30% displacement probability. [Herein, labelled atoms A and B correspond to symmetry oprations i and ii, respectively. (i) = 1 - x, 1 - y, 1 - z; (ii) = 2 - x, 1 - y, 1 - z]
[Figure 2] Fig. 2. three-dimensional packing of one-dimensional chains in the title compound.
catena-Poly[[bis(pyridine-κN)nickel(II)]-di-µ-azido-κ4N1:N3– [bis(pyridine-κN)nickel(II)]-di-µ-azido-κ4N1:N1] top
Crystal data top
[Ni2(N3)4(C5H5N)4]Z = 2
Mr = 300.97F(000) = 308
Triclinic, P1Dx = 1.538 Mg m3
Hall symbol: -P 1Mo Kα radiation, λ = 0.71073 Å
a = 8.1354 (16) ÅCell parameters from 6054 reflections
b = 9.4770 (19) Åθ = 2.9–27.6°
c = 10.094 (2) ŵ = 1.49 mm1
α = 84.66 (3)°T = 293 K
β = 67.17 (3)°Block, green
γ = 65.36 (3)°0.30 × 0.10 × 0.08 mm
V = 649.8 (3) Å3
Data collection top
Bruker SMART 1000 CCD area-detector
diffractometer
2532 independent reflections
Radiation source: fine-focus sealed tube2127 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.037
ϕ and ω scanθmax = 26.0°, θmin = 3.0°
Absorption correction: multi-scan
(SADABS; Bruker, 1998)
h = 1010
Tmin = 0.913, Tmax = 1.000k = 1111
6061 measured reflectionsl = 1212
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)] = 0.061Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.164H-atom parameters constrained
S = 1.08 w = 1/[σ2(Fo2) + (0.0999P)2 + 0.3477P]
where P = (Fo2 + 2Fc2)/3
2532 reflections(Δ/σ)max < 0.001
172 parametersΔρmax = 1.66 e Å3
0 restraintsΔρmin = 0.43 e Å3
Crystal data top
[Ni2(N3)4(C5H5N)4]γ = 65.36 (3)°
Mr = 300.97V = 649.8 (3) Å3
Triclinic, P1Z = 2
a = 8.1354 (16) ÅMo Kα radiation
b = 9.4770 (19) ŵ = 1.49 mm1
c = 10.094 (2) ÅT = 293 K
α = 84.66 (3)°0.30 × 0.10 × 0.08 mm
β = 67.17 (3)°
Data collection top
Bruker SMART 1000 CCD area-detector
diffractometer
2532 independent reflections
Absorption correction: multi-scan
(SADABS; Bruker, 1998)
2127 reflections with I > 2σ(I)
Tmin = 0.913, Tmax = 1.000Rint = 0.037
6061 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0610 restraints
wR(F2) = 0.164H-atom parameters constrained
S = 1.08Δρmax = 1.66 e Å3
2532 reflectionsΔρmin = 0.43 e Å3
172 parameters
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
Ni10.69698 (7)0.51940 (6)0.47848 (5)0.0358 (2)
N10.7466 (6)0.3698 (5)0.6423 (4)0.0435 (9)
N20.6740 (6)0.6716 (5)0.3143 (4)0.0453 (9)
N30.3937 (5)0.6239 (5)0.5965 (4)0.0423 (9)
N40.3021 (5)0.7109 (4)0.7033 (4)0.0392 (8)
N50.2148 (8)0.7941 (6)0.8059 (5)0.0725 (14)
N60.7515 (6)0.6794 (5)0.5723 (5)0.0498 (10)
N70.8790 (5)0.6417 (4)0.6133 (4)0.0423 (9)
N81.0035 (5)0.6082 (5)0.6582 (4)0.0501 (10)
C10.6961 (8)0.4251 (7)0.7757 (5)0.0545 (13)
H1A0.62290.53150.80030.065*
C20.7475 (9)0.3319 (7)0.8788 (6)0.0622 (14)
H2A0.70780.37490.97100.075*
C30.8581 (9)0.1744 (7)0.8438 (6)0.0687 (16)
H3A0.89900.10930.91020.082*
C40.9060 (11)0.1169 (7)0.7085 (7)0.085 (2)
H4A0.97520.01040.68240.101*
C50.8511 (10)0.2176 (7)0.6114 (6)0.0696 (17)
H5A0.88930.17670.51870.084*
C60.5810 (9)0.8266 (7)0.3467 (7)0.0645 (15)
H6A0.51880.86440.44320.077*
C70.5738 (11)0.9323 (8)0.2428 (9)0.086 (2)
H7A0.51091.03900.26850.104*
C80.6626 (11)0.8754 (9)0.0997 (9)0.085 (2)
H8A0.66030.94360.02720.102*
C90.7538 (9)0.7183 (9)0.0657 (7)0.0781 (19)
H9A0.81330.67780.02990.094*
C100.7559 (8)0.6207 (7)0.1759 (5)0.0556 (13)
H10A0.81800.51380.15200.067*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Ni10.0275 (3)0.0467 (4)0.0376 (4)0.0149 (3)0.0162 (2)0.0014 (2)
N10.036 (2)0.055 (2)0.044 (2)0.0173 (18)0.0219 (17)0.0041 (18)
N20.043 (2)0.048 (2)0.048 (2)0.0200 (18)0.0191 (18)0.0057 (18)
N30.0319 (19)0.054 (2)0.042 (2)0.0158 (17)0.0140 (17)0.0113 (18)
N40.040 (2)0.041 (2)0.042 (2)0.0144 (17)0.0242 (18)0.0033 (18)
N50.081 (3)0.066 (3)0.053 (3)0.017 (3)0.018 (3)0.018 (2)
N60.042 (2)0.053 (2)0.065 (3)0.0164 (19)0.032 (2)0.005 (2)
N70.035 (2)0.046 (2)0.046 (2)0.0158 (17)0.0142 (17)0.0091 (17)
N80.0293 (19)0.075 (3)0.046 (2)0.0179 (19)0.0166 (18)0.008 (2)
C10.047 (3)0.068 (3)0.044 (3)0.021 (3)0.016 (2)0.002 (2)
C20.064 (3)0.083 (4)0.041 (3)0.030 (3)0.021 (3)0.007 (3)
C30.079 (4)0.075 (4)0.054 (3)0.022 (3)0.041 (3)0.016 (3)
C40.110 (6)0.057 (4)0.078 (4)0.009 (4)0.056 (4)0.005 (3)
C50.095 (5)0.057 (3)0.058 (3)0.017 (3)0.044 (3)0.005 (3)
C60.077 (4)0.058 (3)0.076 (4)0.032 (3)0.043 (3)0.012 (3)
C70.099 (5)0.063 (4)0.120 (6)0.038 (4)0.066 (5)0.034 (4)
C80.093 (5)0.093 (5)0.094 (5)0.051 (4)0.056 (4)0.047 (4)
C90.064 (4)0.108 (5)0.056 (4)0.035 (4)0.022 (3)0.024 (4)
C100.052 (3)0.070 (3)0.047 (3)0.026 (3)0.022 (2)0.008 (3)
Geometric parameters (Å, º) top
Ni1—N12.124 (4)C1—H1A0.9300
Ni1—N22.105 (4)C2—C31.376 (8)
Ni1—N32.095 (4)C2—H2A0.9300
Ni1—N3i2.103 (4)C3—C41.365 (8)
Ni1—N62.132 (4)C3—H3A0.9300
Ni1—N8ii2.133 (4)C4—C51.371 (8)
N3—N41.195 (5)C4—H4A0.9300
N4—N51.145 (6)C5—H5A0.9300
N6—N71.172 (5)C6—C71.382 (8)
N7—N81.179 (5)C6—H6A0.9300
N1—C51.325 (7)C7—C81.382 (11)
N1—C11.334 (6)C7—H7A0.9300
N2—C101.328 (7)C8—C91.364 (10)
N2—C61.345 (7)C8—H8A0.9300
N3—Ni1i2.103 (4)C9—C101.379 (8)
N8—Ni1ii2.133 (4)C9—H9A0.9300
C1—C21.377 (7)C10—H10A0.9300
N1—Ni1—N688.38 (16)N1—C1—H1A118.5
N1—Ni1—N8ii88.52 (16)C2—C1—H1A118.5
N2—Ni1—N1173.88 (14)C3—C2—C1119.3 (5)
N2—Ni1—N687.15 (16)C3—C2—H2A120.4
N2—Ni1—N8ii87.70 (16)C1—C2—H2A120.4
N3—Ni1—N192.67 (15)C4—C3—C2117.8 (5)
N3i—Ni1—N191.49 (15)C4—C3—H3A121.1
N3—Ni1—N291.78 (16)C2—C3—H3A121.1
N3i—Ni1—N293.47 (16)C3—C4—C5119.3 (6)
N3—Ni1—N3i79.16 (16)C3—C4—H4A120.3
N3—Ni1—N693.68 (15)C5—C4—H4A120.3
N3i—Ni1—N6172.83 (14)N1—C5—C4123.8 (5)
N3—Ni1—N8ii171.42 (14)N1—C5—H5A118.1
N3i—Ni1—N8ii92.31 (15)C4—C5—H5A118.1
N6—Ni1—N8ii94.85 (16)N2—C6—C7122.9 (6)
N7—N6—Ni1123.5 (3)N2—C6—H6A118.5
N7—N8—Ni1ii120.3 (3)C7—C6—H6A118.5
Ni1—N3—Ni1i100.84 (16)C6—C7—C8118.2 (7)
C5—N1—C1116.7 (4)C6—C7—H7A120.9
C5—N1—Ni1120.9 (3)C8—C7—H7A120.9
C1—N1—Ni1121.9 (3)C9—C8—C7119.4 (6)
C10—N2—C6117.3 (5)C9—C8—H8A120.3
C10—N2—Ni1122.3 (4)C7—C8—H8A120.3
C6—N2—Ni1120.3 (4)C8—C9—C10118.7 (6)
N4—N3—Ni1129.7 (3)C8—C9—H9A120.6
N4—N3—Ni1i126.7 (3)C10—C9—H9A120.6
N5—N4—N3179.8 (6)N2—C10—C9123.4 (6)
N6—N7—N8177.7 (5)N2—C10—H10A118.3
N1—C1—C2123.0 (5)C9—C10—H10A118.3
N3—Ni1—N1—C5128.9 (4)N1—Ni1—N3—Ni1i91.00 (17)
N3i—Ni1—N1—C549.6 (4)N6—Ni1—N3—Ni1i179.55 (16)
N6—Ni1—N1—C5137.5 (4)N2—Ni1—N6—N7132.9 (4)
N8ii—Ni1—N1—C542.6 (4)N1—Ni1—N6—N742.9 (4)
N3—Ni1—N1—C159.6 (4)N8ii—Ni1—N6—N745.5 (4)
N3i—Ni1—N1—C1138.8 (4)C5—N1—C1—C20.1 (8)
N6—Ni1—N1—C134.0 (4)Ni1—N1—C1—C2171.9 (4)
N8ii—Ni1—N1—C1128.9 (4)N1—C1—C2—C30.9 (9)
N3—Ni1—N2—C10129.8 (4)C1—C2—C3—C42.4 (10)
N3i—Ni1—N2—C1050.6 (4)C2—C3—C4—C53.1 (11)
N6—Ni1—N2—C10136.6 (4)C1—N1—C5—C40.8 (9)
N8ii—Ni1—N2—C1041.6 (4)Ni1—N1—C5—C4172.8 (6)
N3—Ni1—N2—C653.0 (4)C3—C4—C5—N12.4 (11)
N3i—Ni1—N2—C6132.3 (4)C10—N2—C6—C72.2 (8)
N6—Ni1—N2—C640.6 (4)Ni1—N2—C6—C7175.1 (5)
N8ii—Ni1—N2—C6135.6 (4)N2—C6—C7—C81.5 (10)
N3i—Ni1—N3—N4161.8 (5)C6—C7—C8—C90.0 (11)
N2—Ni1—N3—N4105.0 (4)C7—C8—C9—C100.6 (10)
N1—Ni1—N3—N470.8 (4)C6—N2—C10—C91.6 (8)
N6—Ni1—N3—N417.8 (4)Ni1—N2—C10—C9175.7 (4)
N3i—Ni1—N3—Ni1i0.0C8—C9—C10—N20.2 (9)
N2—Ni1—N3—Ni1i93.19 (17)
Symmetry codes: (i) x+1, y+1, z+1; (ii) x+2, y+1, z+1.

Experimental details

Crystal data
Chemical formula[Ni2(N3)4(C5H5N)4]
Mr300.97
Crystal system, space groupTriclinic, P1
Temperature (K)293
a, b, c (Å)8.1354 (16), 9.4770 (19), 10.094 (2)
α, β, γ (°)84.66 (3), 67.17 (3), 65.36 (3)
V3)649.8 (3)
Z2
Radiation typeMo Kα
µ (mm1)1.49
Crystal size (mm)0.30 × 0.10 × 0.08
Data collection
DiffractometerBruker SMART 1000 CCD area-detector
diffractometer
Absorption correctionMulti-scan
(SADABS; Bruker, 1998)
Tmin, Tmax0.913, 1.000
No. of measured, independent and
observed [I > 2σ(I)] reflections
6061, 2532, 2127
Rint0.037
(sin θ/λ)max1)0.617
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.061, 0.164, 1.08
No. of reflections2532
No. of parameters172
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å3)1.66, 0.43

Computer programs: SMART (Bruker, 1998), SHELXTL (Bruker, 1998), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997).

 

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