metal-organic compounds
Tetrakis(azido-κN)(di-2-pyridylamine-κ2N2,N2′)platinum(IV)
aSchool of Applied Chemical Engineering, The Research Institute of Catalysis, Chonnam National University, Gwangju 500-757, Republic of Korea
*Correspondence e-mail: hakwang@chonnam.ac.kr
In the title complex, [Pt(N3)4(C10H9N3)], the PtIV ion is six-coordinated in a slightly distorted octahedral environment by the two pyridine N atoms of the chelating di-2-pyridylamine (dpa) ligand and four N atoms from four azide anions. The dpa ligand is not planar, the dihedral angle between the pyridine rings being 20.0 (3)°. The azide ligands are slightly bent [N—N—N = 173.5 (8)–175.1 (8)°]. In the crystal, the complex molecules are connected by N—H⋯N hydrogen bonds, forming a chain along the b axis. An intermolecular π–π interaction between the chains is also present, the ring centroid–centroid distance being 3.713 (4) Å.
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2000); cell SAINT (Bruker, 2000); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.
Supporting information
10.1107/S1600536812011178/is5092sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812011178/is5092Isup2.hkl
To a solution of Na2PtCl6.6H2O (0.1684 g, 0.300 mmol) in MeOH (30 ml) were added NaN3 (0.2129 g, 3.275 mmol) and di-2-pyridylamine (0.1046 g, 0.611 mmol), and the mixture was refluxed for 5 h. The formed precipitate was separated by filtration and washed with H2O and MeOH, and dried at 50 °C, to give a yellow powder (0.0687 g). Crystals suitable for X-ray analysis were obtained by slow evaporation from an acetone solution.
Carbon-bound H atoms were positioned geometrically and allowed to ride on their respective parent atoms [C—H = 0.95 Å and Uiso(H) = 1.2Ueq(C)]. Nitrogen-bound H atom was located in a difference Fourier map and then allowed to ride on its parent atom in the final cycles of
with N—H = 0.92 Å and Uiso(H) = 1.5 Ueq(N). The highest peak (2.25 eÅ-3) and the deepest hole (-0.86 eÅ-3) in the difference Fourier map are located 1.25 Å and 1.09 Å from the atoms N4 and C10, respectively.Crystal structure of the related chlorido PtIV complex, [PtCl4(dpa)] (dpa = di-2-pyridylamine, C10H9N3), has been reported previously (Ha, 2011).
In the title complex, [Pt(N3)4(dpa)], the PtIV ion is six-coordinated in a slightly distorted octahedral environment by the two pyridine N atoms of the chelating dpa ligand and four N atoms from four azide anions (Fig. 1). In the π–π interaction between the pyridine rings is also present, the ring centroid-centroid distance being 3.713 (4) Å.
the dpa ligand is not planar. The dihedral angle between the least-squares planes of the pyridine rings is 20.0 (3)°. The Pt—N(dpa) and Pt—N(azide) bond lengths are nearly equivalent [Pt—N: 2.029 (7)–2.076 (6) Å] (Table 1). The azido ligands are slightly bent with the bond angles of <N4—N5—N6 = 174.1 (9)°, <N7—N8—N9 = 173.5 (8)°, <N10—N11—N12 = 174.3 (8)° and <N13—N14—N15 = 175.1 (8)°. But, the N—N bond lengths of the ligands are almost equal [N—N: 1.129 (9)–1.236 (9) Å]. The complex molecules are stacked in columns along the a axis and are connected by intermolecular N—H···N hydrogen bonds, forming chains along the b axis (Fig. 2 and Table 2). Along the b axis, successive chains stack in opposite directions. An intermolecularFor the
of the related chlorido PtIV complex [PtCl4(dpa)], see: Ha (2011).Data collection: SMART (Bruker, 2000); cell
SAINT (Bruker, 2000); data reduction: SAINT (Bruker, 2000); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).[Pt(N3)4(C10H9N3)] | F(000) = 1008 |
Mr = 534.41 | Dx = 2.316 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 3131 reflections |
a = 7.0057 (4) Å | θ = 2.8–25.9° |
b = 14.7685 (9) Å | µ = 9.19 mm−1 |
c = 14.9633 (9) Å | T = 200 K |
β = 98.118 (1)° | Block, yellow |
V = 1532.64 (16) Å3 | 0.18 × 0.07 × 0.06 mm |
Z = 4 |
Bruker SMART 1000 CCD diffractometer | 3004 independent reflections |
Radiation source: fine-focus sealed tube | 2132 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.063 |
φ and ω scans | θmax = 26.0°, θmin = 2.0° |
Absorption correction: multi-scan (SADABS; Bruker, 2000) | h = −8→8 |
Tmin = 0.420, Tmax = 0.576 | k = −18→17 |
9422 measured reflections | l = −18→16 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.036 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.077 | H-atom parameters constrained |
S = 0.94 | w = 1/[σ2(Fo2) + (0.0288P)2] where P = (Fo2 + 2Fc2)/3 |
3004 reflections | (Δ/σ)max < 0.001 |
235 parameters | Δρmax = 2.25 e Å−3 |
0 restraints | Δρmin = −0.86 e Å−3 |
[Pt(N3)4(C10H9N3)] | V = 1532.64 (16) Å3 |
Mr = 534.41 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 7.0057 (4) Å | µ = 9.19 mm−1 |
b = 14.7685 (9) Å | T = 200 K |
c = 14.9633 (9) Å | 0.18 × 0.07 × 0.06 mm |
β = 98.118 (1)° |
Bruker SMART 1000 CCD diffractometer | 3004 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2000) | 2132 reflections with I > 2σ(I) |
Tmin = 0.420, Tmax = 0.576 | Rint = 0.063 |
9422 measured reflections |
R[F2 > 2σ(F2)] = 0.036 | 0 restraints |
wR(F2) = 0.077 | H-atom parameters constrained |
S = 0.94 | Δρmax = 2.25 e Å−3 |
3004 reflections | Δρmin = −0.86 e Å−3 |
235 parameters |
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. |
x | y | z | Uiso*/Ueq | ||
Pt1 | 0.81972 (4) | 0.15708 (2) | 0.266198 (19) | 0.02164 (11) | |
N1 | 0.8308 (9) | 0.0693 (4) | 0.1599 (4) | 0.0190 (14) | |
N2 | 0.9443 (9) | −0.0523 (4) | 0.2561 (4) | 0.0229 (15) | |
H2N | 0.9692 | −0.1135 | 0.2562 | 0.034* | |
N3 | 1.0214 (9) | 0.0791 (4) | 0.3460 (4) | 0.0200 (14) | |
C1 | 0.7670 (11) | 0.0998 (5) | 0.0743 (5) | 0.0256 (19) | |
H1 | 0.7444 | 0.1627 | 0.0644 | 0.031* | |
C2 | 0.7353 (11) | 0.0410 (6) | 0.0027 (5) | 0.0279 (19) | |
H2 | 0.6910 | 0.0628 | −0.0563 | 0.033* | |
C3 | 0.7682 (12) | −0.0494 (6) | 0.0174 (5) | 0.032 (2) | |
H3 | 0.7438 | −0.0911 | −0.0313 | 0.038* | |
C4 | 0.8357 (12) | −0.0795 (5) | 0.1014 (5) | 0.0271 (19) | |
H4 | 0.8587 | −0.1423 | 0.1115 | 0.033* | |
C5 | 0.8713 (11) | −0.0191 (5) | 0.1725 (5) | 0.0211 (17) | |
C6 | 1.0400 (11) | −0.0099 (5) | 0.3320 (5) | 0.0201 (17) | |
C7 | 1.1569 (11) | −0.0630 (5) | 0.3944 (5) | 0.0229 (18) | |
H7 | 1.1680 | −0.1262 | 0.3847 | 0.028* | |
C8 | 1.2555 (11) | −0.0231 (6) | 0.4697 (5) | 0.0278 (19) | |
H8 | 1.3342 | −0.0587 | 0.5132 | 0.033* | |
C9 | 1.2400 (11) | 0.0690 (6) | 0.4821 (5) | 0.028 (2) | |
H9 | 1.3085 | 0.0978 | 0.5337 | 0.034* | |
C10 | 1.1251 (11) | 0.1176 (6) | 0.4191 (5) | 0.0232 (18) | |
H10 | 1.1172 | 0.1813 | 0.4267 | 0.028* | |
N4 | 0.6200 (11) | 0.2306 (5) | 0.1855 (4) | 0.0369 (19) | |
N5 | 0.5449 (10) | 0.2945 (5) | 0.2159 (4) | 0.0302 (16) | |
N6 | 0.4660 (13) | 0.3556 (6) | 0.2374 (6) | 0.063 (3) | |
N7 | 0.8045 (10) | 0.2450 (5) | 0.3692 (5) | 0.0319 (17) | |
N8 | 0.6586 (12) | 0.2401 (5) | 0.4068 (4) | 0.0353 (19) | |
N9 | 0.5310 (14) | 0.2423 (6) | 0.4464 (6) | 0.059 (3) | |
N10 | 1.0370 (10) | 0.2427 (4) | 0.2364 (4) | 0.0281 (17) | |
N11 | 1.0858 (10) | 0.2358 (4) | 0.1613 (5) | 0.0306 (17) | |
N12 | 1.1381 (12) | 0.2365 (5) | 0.0918 (5) | 0.041 (2) | |
N13 | 0.6117 (10) | 0.0768 (4) | 0.3100 (4) | 0.0247 (15) | |
N14 | 0.4674 (10) | 0.0646 (4) | 0.2548 (4) | 0.0281 (17) | |
N15 | 0.3276 (11) | 0.0487 (5) | 0.2071 (5) | 0.043 (2) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Pt1 | 0.02640 (18) | 0.01631 (17) | 0.02080 (17) | 0.00107 (15) | −0.00153 (12) | −0.00106 (14) |
N1 | 0.024 (4) | 0.016 (4) | 0.016 (4) | −0.002 (3) | 0.001 (3) | −0.001 (3) |
N2 | 0.035 (4) | 0.013 (4) | 0.019 (4) | −0.001 (3) | −0.003 (3) | 0.005 (3) |
N3 | 0.020 (4) | 0.019 (4) | 0.019 (4) | 0.002 (3) | −0.001 (3) | 0.003 (3) |
C1 | 0.031 (5) | 0.024 (5) | 0.020 (5) | 0.001 (4) | −0.001 (4) | 0.002 (3) |
C2 | 0.026 (5) | 0.033 (5) | 0.023 (5) | 0.002 (4) | −0.003 (4) | 0.001 (4) |
C3 | 0.038 (5) | 0.039 (6) | 0.017 (4) | −0.001 (4) | −0.004 (4) | −0.007 (4) |
C4 | 0.038 (5) | 0.016 (5) | 0.027 (5) | 0.003 (4) | 0.003 (4) | −0.006 (3) |
C5 | 0.021 (4) | 0.026 (5) | 0.016 (4) | −0.004 (4) | 0.004 (3) | −0.002 (3) |
C6 | 0.018 (4) | 0.020 (5) | 0.024 (4) | −0.004 (3) | 0.007 (3) | 0.002 (3) |
C7 | 0.018 (4) | 0.021 (5) | 0.030 (5) | 0.003 (3) | 0.003 (4) | 0.005 (3) |
C8 | 0.022 (4) | 0.041 (6) | 0.020 (4) | 0.000 (4) | 0.003 (4) | 0.004 (4) |
C9 | 0.020 (4) | 0.038 (6) | 0.027 (5) | 0.000 (4) | 0.004 (4) | −0.009 (4) |
C10 | 0.021 (4) | 0.024 (5) | 0.023 (5) | 0.002 (4) | −0.002 (4) | 0.001 (3) |
N4 | 0.044 (5) | 0.033 (5) | 0.029 (4) | 0.022 (4) | −0.010 (4) | −0.002 (3) |
N5 | 0.035 (4) | 0.020 (4) | 0.035 (4) | 0.003 (4) | 0.002 (3) | 0.004 (3) |
N6 | 0.070 (7) | 0.049 (6) | 0.067 (6) | 0.038 (5) | 0.000 (5) | −0.005 (5) |
N7 | 0.029 (4) | 0.029 (4) | 0.037 (4) | 0.002 (3) | 0.004 (4) | −0.009 (3) |
N8 | 0.059 (6) | 0.024 (4) | 0.022 (4) | −0.001 (4) | 0.001 (4) | −0.013 (3) |
N9 | 0.071 (7) | 0.049 (6) | 0.063 (6) | −0.022 (5) | 0.038 (5) | −0.025 (4) |
N10 | 0.039 (4) | 0.018 (4) | 0.027 (4) | −0.011 (3) | 0.005 (3) | −0.005 (3) |
N11 | 0.034 (4) | 0.015 (4) | 0.041 (5) | −0.006 (3) | −0.003 (4) | −0.002 (3) |
N12 | 0.056 (6) | 0.030 (5) | 0.040 (5) | −0.007 (4) | 0.014 (4) | 0.001 (4) |
N13 | 0.029 (4) | 0.020 (4) | 0.024 (4) | −0.002 (3) | −0.003 (3) | 0.000 (3) |
N14 | 0.031 (4) | 0.028 (4) | 0.027 (4) | 0.003 (3) | 0.011 (4) | 0.003 (3) |
N15 | 0.031 (5) | 0.062 (6) | 0.030 (5) | −0.005 (4) | −0.011 (4) | 0.002 (4) |
Pt1—N4 | 2.029 (7) | C4—C5 | 1.383 (10) |
Pt1—N7 | 2.030 (7) | C4—H4 | 0.9500 |
Pt1—N13 | 2.057 (6) | C6—C7 | 1.393 (10) |
Pt1—N1 | 2.061 (6) | C7—C8 | 1.369 (11) |
Pt1—N3 | 2.067 (6) | C7—H7 | 0.9500 |
Pt1—N10 | 2.076 (6) | C8—C9 | 1.379 (11) |
N1—C5 | 1.344 (9) | C8—H8 | 0.9500 |
N1—C1 | 1.372 (9) | C9—C10 | 1.356 (11) |
N2—C5 | 1.373 (9) | C9—H9 | 0.9500 |
N2—C6 | 1.385 (9) | C10—H10 | 0.9500 |
N2—H2N | 0.9200 | N4—N5 | 1.200 (9) |
N3—C6 | 1.340 (9) | N5—N6 | 1.129 (9) |
N3—C10 | 1.350 (9) | N7—N8 | 1.236 (9) |
C1—C2 | 1.373 (10) | N8—N9 | 1.141 (10) |
C1—H1 | 0.9500 | N10—N11 | 1.223 (9) |
C2—C3 | 1.367 (11) | N11—N12 | 1.151 (9) |
C2—H2 | 0.9500 | N13—N14 | 1.225 (9) |
C3—C4 | 1.353 (11) | N14—N15 | 1.152 (9) |
C3—H3 | 0.9500 | ||
N4—Pt1—N7 | 90.2 (3) | C4—C3—H3 | 120.1 |
N4—Pt1—N13 | 92.2 (3) | C2—C3—H3 | 120.1 |
N7—Pt1—N13 | 90.6 (3) | C3—C4—C5 | 120.3 (8) |
N4—Pt1—N1 | 88.6 (3) | C3—C4—H4 | 119.9 |
N7—Pt1—N1 | 178.8 (3) | C5—C4—H4 | 119.9 |
N13—Pt1—N1 | 89.4 (2) | N1—C5—N2 | 121.2 (6) |
N4—Pt1—N3 | 178.4 (3) | N1—C5—C4 | 120.5 (7) |
N7—Pt1—N3 | 91.3 (3) | N2—C5—C4 | 118.3 (7) |
N13—Pt1—N3 | 87.3 (2) | N3—C6—N2 | 121.7 (7) |
N1—Pt1—N3 | 89.9 (2) | N3—C6—C7 | 120.5 (7) |
N4—Pt1—N10 | 90.6 (3) | N2—C6—C7 | 117.8 (7) |
N7—Pt1—N10 | 83.8 (3) | C8—C7—C6 | 119.4 (8) |
N13—Pt1—N10 | 173.8 (2) | C8—C7—H7 | 120.3 |
N1—Pt1—N10 | 96.2 (2) | C6—C7—H7 | 120.3 |
N3—Pt1—N10 | 90.1 (3) | C7—C8—C9 | 119.7 (8) |
C5—N1—C1 | 119.0 (6) | C7—C8—H8 | 120.2 |
C5—N1—Pt1 | 122.3 (5) | C9—C8—H8 | 120.2 |
C1—N1—Pt1 | 118.1 (5) | C10—C9—C8 | 118.6 (8) |
C5—N2—C6 | 131.3 (6) | C10—C9—H9 | 120.7 |
C5—N2—H2N | 113.5 | C8—C9—H9 | 120.7 |
C6—N2—H2N | 111.9 | N3—C10—C9 | 122.6 (8) |
C6—N3—C10 | 119.1 (6) | N3—C10—H10 | 118.7 |
C6—N3—Pt1 | 122.0 (5) | C9—C10—H10 | 118.7 |
C10—N3—Pt1 | 118.6 (5) | N5—N4—Pt1 | 119.8 (6) |
N1—C1—C2 | 121.0 (8) | N6—N5—N4 | 174.1 (9) |
N1—C1—H1 | 119.5 | N8—N7—Pt1 | 116.3 (5) |
C2—C1—H1 | 119.5 | N9—N8—N7 | 173.5 (8) |
C3—C2—C1 | 119.2 (8) | N11—N10—Pt1 | 117.1 (5) |
C3—C2—H2 | 120.4 | N12—N11—N10 | 174.3 (8) |
C1—C2—H2 | 120.4 | N14—N13—Pt1 | 115.1 (5) |
C4—C3—C2 | 119.9 (8) | N15—N14—N13 | 175.1 (8) |
N4—Pt1—N1—C5 | −149.7 (6) | C10—N3—C6—N2 | −176.9 (6) |
N13—Pt1—N1—C5 | −57.5 (6) | Pt1—N3—C6—N2 | 9.2 (9) |
N3—Pt1—N1—C5 | 29.7 (6) | C10—N3—C6—C7 | 3.3 (10) |
N10—Pt1—N1—C5 | 119.8 (6) | Pt1—N3—C6—C7 | −170.6 (5) |
N4—Pt1—N1—C1 | 20.5 (6) | C5—N2—C6—N3 | 23.2 (12) |
N13—Pt1—N1—C1 | 112.7 (6) | C5—N2—C6—C7 | −157.0 (7) |
N3—Pt1—N1—C1 | −160.1 (5) | N3—C6—C7—C8 | −1.0 (11) |
N10—Pt1—N1—C1 | −70.0 (6) | N2—C6—C7—C8 | 179.2 (6) |
N7—Pt1—N3—C6 | 152.3 (6) | C6—C7—C8—C9 | −0.9 (11) |
N13—Pt1—N3—C6 | 61.7 (6) | C7—C8—C9—C10 | 0.6 (11) |
N1—Pt1—N3—C6 | −27.7 (6) | C6—N3—C10—C9 | −3.7 (11) |
N10—Pt1—N3—C6 | −123.9 (6) | Pt1—N3—C10—C9 | 170.4 (6) |
N7—Pt1—N3—C10 | −21.7 (6) | C8—C9—C10—N3 | 1.8 (12) |
N13—Pt1—N3—C10 | −112.2 (6) | N7—Pt1—N4—N5 | −4.3 (7) |
N1—Pt1—N3—C10 | 158.4 (5) | N13—Pt1—N4—N5 | 86.4 (7) |
N10—Pt1—N3—C10 | 62.1 (5) | N1—Pt1—N4—N5 | 175.7 (7) |
C5—N1—C1—C2 | 3.2 (11) | N10—Pt1—N4—N5 | −88.1 (7) |
Pt1—N1—C1—C2 | −167.4 (6) | N4—Pt1—N7—N8 | 74.2 (6) |
N1—C1—C2—C3 | 0.0 (12) | N13—Pt1—N7—N8 | −18.0 (6) |
C1—C2—C3—C4 | −1.6 (12) | N3—Pt1—N7—N8 | −105.3 (6) |
C2—C3—C4—C5 | 0.1 (12) | N10—Pt1—N7—N8 | 164.8 (6) |
C1—N1—C5—N2 | 176.9 (7) | N4—Pt1—N10—N11 | −73.8 (6) |
Pt1—N1—C5—N2 | −13.0 (9) | N7—Pt1—N10—N11 | −164.0 (6) |
C1—N1—C5—C4 | −4.7 (10) | N1—Pt1—N10—N11 | 14.8 (6) |
Pt1—N1—C5—C4 | 165.4 (6) | N3—Pt1—N10—N11 | 104.7 (6) |
C6—N2—C5—N1 | −21.0 (12) | N4—Pt1—N13—N14 | 31.4 (6) |
C6—N2—C5—C4 | 160.5 (7) | N7—Pt1—N13—N14 | 121.6 (6) |
C3—C4—C5—N1 | 3.2 (12) | N1—Pt1—N13—N14 | −57.2 (6) |
C3—C4—C5—N2 | −178.4 (7) | N3—Pt1—N13—N14 | −147.1 (6) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2N···N10i | 0.92 | 2.13 | 3.031 (9) | 167 |
N2—H2N···N11i | 0.92 | 2.60 | 3.381 (9) | 143 |
Symmetry code: (i) −x+2, y−1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | [Pt(N3)4(C10H9N3)] |
Mr | 534.41 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 200 |
a, b, c (Å) | 7.0057 (4), 14.7685 (9), 14.9633 (9) |
β (°) | 98.118 (1) |
V (Å3) | 1532.64 (16) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 9.19 |
Crystal size (mm) | 0.18 × 0.07 × 0.06 |
Data collection | |
Diffractometer | Bruker SMART 1000 CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2000) |
Tmin, Tmax | 0.420, 0.576 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 9422, 3004, 2132 |
Rint | 0.063 |
(sin θ/λ)max (Å−1) | 0.617 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.036, 0.077, 0.94 |
No. of reflections | 3004 |
No. of parameters | 235 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 2.25, −0.86 |
Computer programs: SMART (Bruker, 2000), SAINT (Bruker, 2000), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009).
Pt1—N4 | 2.029 (7) | Pt1—N1 | 2.061 (6) |
Pt1—N7 | 2.030 (7) | Pt1—N3 | 2.067 (6) |
Pt1—N13 | 2.057 (6) | Pt1—N10 | 2.076 (6) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2N···N10i | 0.92 | 2.13 | 3.031 (9) | 167 |
N2—H2N···N11i | 0.92 | 2.60 | 3.381 (9) | 143 |
Symmetry code: (i) −x+2, y−1/2, −z+1/2. |
Acknowledgements
This work was supported by the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011–0030747).
References
Bruker (2000). SADABS, SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
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Spek, A. L. (2009). Acta Cryst. D65, 148–155. Web of Science CrossRef CAS IUCr Journals Google Scholar
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Crystal structure of the related chlorido PtIV complex, [PtCl4(dpa)] (dpa = di-2-pyridylamine, C10H9N3), has been reported previously (Ha, 2011).
In the title complex, [Pt(N3)4(dpa)], the PtIV ion is six-coordinated in a slightly distorted octahedral environment by the two pyridine N atoms of the chelating dpa ligand and four N atoms from four azide anions (Fig. 1). In the crystal structure, the dpa ligand is not planar. The dihedral angle between the least-squares planes of the pyridine rings is 20.0 (3)°. The Pt—N(dpa) and Pt—N(azide) bond lengths are nearly equivalent [Pt—N: 2.029 (7)–2.076 (6) Å] (Table 1). The azido ligands are slightly bent with the bond angles of <N4—N5—N6 = 174.1 (9)°, <N7—N8—N9 = 173.5 (8)°, <N10—N11—N12 = 174.3 (8)° and <N13—N14—N15 = 175.1 (8)°. But, the N—N bond lengths of the ligands are almost equal [N—N: 1.129 (9)–1.236 (9) Å]. The complex molecules are stacked in columns along the a axis and are connected by intermolecular N—H···N hydrogen bonds, forming chains along the b axis (Fig. 2 and Table 2). Along the b axis, successive chains stack in opposite directions. An intermolecular π–π interaction between the pyridine rings is also present, the ring centroid-centroid distance being 3.713 (4) Å.