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Acta Cryst. (2009). E65, m1057    [ doi:10.1107/S1600536809030724 ]

trans-Dioxidotetrapyridinerhenium(V) triiodide

M. Siczek, M. S. Krawczyk and T. Lis

Abstract top

In the title salt, [ReO2(C5H5N)4]I3, the cation and anion are both located on centres of symmetry. The ReV atom adopts a trans-ReO2N4 octahedral coordination and short intramolecular C-H...O contacts occur within the cation. In the crystal, the cations form layers perpendicular to [100] and a weak C-H...O interaction links the cations.

Comment top

The crystal structure of a salt containing [ReO2(C5H5N)4]+ cation was first investigated by Calvo et al., (1971). The authors obtained dioxidotetra(pyridine)rhenium(V) chloride dihydrate in the reaction between trichloridooxidobis(triphenylphosphine)rhenium(V) (Johnson et al., 1967) and hot pyridine used in excess. The crystal structure of [ReO2(C5H5N)4]Cl.2H2O was redetermined by Lock & Turner (1978). The cation [ReO2(C5H5N)4]+ was also described by Luck & O'Neill (2001) as [ReO2(C5H5N)4[OH].1.75H2O salt. This salt was prepared by dissolving ReCl(H2)(PMePh2)4 in the mixture of benzene, pyridine, water and hexane.

The crystal structure of trans-dioxidotetra(pyridine)rhenium(V) triiodide comprises of [ReO2(C5H5N)4]+ cations and I3- anions (Fig. 1). Both ions are located on centres of symmetry. The cation is a distorted octahedron, with two oxido (terminal) ligands in trans arrangement and four pyridine ligands in equatorial positions.

The average Re—O and Re—N bond distances equal 1.765 (2), 2.143 (2) Å, respectively, and are in good agreement with values reported by Calvo et al., (1971), Lock & Turner (1978) and Luck & O'Neill (2001). Moreover, comparing the values of O—Re—O angle comparatively small differences between previous and present results can be observed. In the crystal structure reported here this angle equals 180° and reported for other salts is 171 (1)° (Calvo et al., 1971) and 174.5 (4)° (Lock & Turner, 1978). Similarly, the value of N—Re—Ntrans angles in [ReO2(C5H5N)4]I3 equals 180° and the analogous complex cations that have been determined previously have near linear arrangement of the N—Re—Ntrans moiety. These angles are 176 (2) and 170 (1)° (Calvo et al., 1971), and 173.9 (4) and 175.2 (6)° (Lock & Turner, 1978). The comparatively weak intramolecular hydrogen bonds such as C—H···O can be observed (Fig. 2, Table 2).

The molecular packing in the crystal structure can be described as layers perpendicular to [100] direction which consist of the complex cations (Fig. 3). The I3- anions are located between the layers of [ReO2(C5H5N)4]+ cations. In the crystal packing there are intermolecular stacking interactions between pyridine rings with centroid-centroid distance of 3.831 (2) Å and a slip angle 25°. These values are comparable with the corresponding values reported for transition-metal pyridine fragments (Janiak, 2000). (The ring centroid contacts range between 3.4 and 3.8 Å and the angle averages 27°).

Related literature top

For related structures containing the same cation, see: Calvo et al., (1971); Lock & Turner (1978); Luck & O'Neill (2001). For further synthetic details, see: Johnson et al. (1967). For background to aromatic π–π stacking, see: Janiak (2000).

Experimental top

Rhenium(III) iodide 0.2982 g (0.1753 mmol) was refluxed in dry pyridine (5 ml) (62 mmol) for 3 h at 423 K. The mixture was allowed to evaporate in air at high temperature to give a greenish brown precipitate. The complex was recrystallized from methanol to yield orange blocks of (I).

Refinement top

All hydrogen atoms were placed in calculated positions and refined using riding model [C—H = 0.95 Å and Uiso(H) = 1.2Ueq(C)]. The highest peak and the deepest hole in the final difference map were 1.07 Å from N1 and 0.78 Å from Re, respectively.

Computing details top

Data collection: CrysAlis CCD (Oxford Diffraction, 2006); cell refinement: CrysAlis RED (Oxford Diffraction, 2006); data reduction: CrysAlis RED (Oxford Diffraction, 2006); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHEXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and publCIF (Westrip, 2009).

Figures top
[Figure 1] Fig. 1. The molecular structure of (I) showing ellipsoids drawn at the 30% probability level. The unlabelled atoms of the cation are generated by the symmetry operation (1–x, 1–y, 1–z) and the unlabelled I atom by (2–x, 2–y, 2–z).
[Figure 2] Fig. 2. A part of the crystal structure showing formation of C—H···O hydrogen bonding. [symmetry code (i) -x + 1, -y + 1, -z + 1; (ii) x - 1, y, z.]
[Figure 3] Fig. 3. A packing diagram of (I) showing layers of cations and anions. Hydrogen atoms are omitted for clarity.
trans-dioxidotetra(pyridine)rhenium(V) triiodide top
Crystal data top
[ReO2(C5H5N)4]I3Z = 1
Mr = 915.30F(000) = 418
Triclinic, P1Dx = 2.370 Mg m−3
Hall symbol: -P 1Mo Kα radiation, λ = 0.71073 Å
a = 7.993 (3) ÅCell parameters from 11676 reflections
b = 9.100 (3) Åθ = 4.5–38.4°
c = 9.356 (3) ŵ = 8.37 mm−1
α = 92.45 (4)°T = 100 K
β = 102.41 (4)°Block, orange
γ = 104.10 (4)°0.10 × 0.10 × 0.07 mm
V = 641.3 (4) Å3
Data collection top
Oxford Diffraction Xcalibur PX KM-4-CCD
diffractometer		4298 independent reflections
Radiation source: fine-focus sealed tube3593 reflections with I > 2σ(I)
graphiteRint = 0.027
φ and ω scansθmax = 32.5°, θmin = 4.5°
Absorption correction: analytical
(CrysAlis RED; Oxford Diffraction, 2006)		h = −12→11
Tmin = 0.411, Tmax = 0.656k = −9→13
11244 measured reflectionsl = −14→14
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)] = 0.019Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.031H-atom parameters constrained
S = 1.04 w = 1/[σ2(Fo2) + (0.008P)2]
where P = (Fo2 + 2Fc2)/3
4298 reflections(Δ/σ)max = 0.003
139 parametersΔρmax = 1.40 e Å−3
0 restraintsΔρmin = −1.08 e Å−3
Crystal data top
[ReO2(C5H5N)4]I3γ = 104.10 (4)°
Mr = 915.30V = 641.3 (4) Å3
Triclinic, P1Z = 1
a = 7.993 (3) ÅMo Kα radiation
b = 9.100 (3) ŵ = 8.37 mm−1
c = 9.356 (3) ÅT = 100 K
α = 92.45 (4)°0.10 × 0.10 × 0.07 mm
β = 102.41 (4)°
Data collection top
Oxford Diffraction Xcalibur PX KM-4-CCD
diffractometer		4298 independent reflections
Absorption correction: analytical
(CrysAlis RED; Oxford Diffraction, 2006)		3593 reflections with I > 2σ(I)
Tmin = 0.411, Tmax = 0.656Rint = 0.027
11244 measured reflectionsθmax = 32.5°
Refinement top
R[F2 > 2σ(F2)] = 0.019H-atom parameters constrained
wR(F2) = 0.031Δρmax = 1.40 e Å−3
S = 1.04Δρmin = −1.08 e Å−3
4298 reflectionsAbsolute structure: ?
139 parametersFlack parameter: ?
0 restraintsRogers parameter: ?
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
Re0.50000.50000.50000.01065 (3)
I10.92874 (2)1.171742 (18)0.747033 (17)0.02194 (4)
I21.00001.00001.00000.01924 (5)
O0.7122 (2)0.62887 (16)0.53698 (16)0.0144 (3)
N10.5561 (2)0.4374 (2)0.71983 (19)0.0132 (4)
C110.4386 (3)0.3225 (2)0.7640 (2)0.0159 (5)
H110.33180.27070.69570.019*
C120.4708 (3)0.2798 (3)0.9045 (3)0.0213 (5)
H120.38730.19880.93150.026*
C130.6234 (3)0.3541 (3)1.0059 (3)0.0225 (6)
H130.64680.32511.10310.027*
C140.7421 (3)0.4718 (3)0.9631 (3)0.0223 (5)
H140.84800.52601.03100.027*
C150.7045 (3)0.5096 (3)0.8203 (2)0.0176 (5)
H150.78720.59030.79180.021*
N20.3956 (2)0.6744 (2)0.58055 (19)0.0126 (4)
C210.2226 (3)0.6460 (3)0.5840 (2)0.0148 (5)
H210.14810.54670.55060.018*
C220.1494 (3)0.7552 (3)0.6340 (2)0.0173 (5)
H220.02680.73120.63370.021*
C230.2564 (3)0.8991 (3)0.6844 (3)0.0196 (5)
H230.20920.97620.71920.024*
C240.4346 (3)0.9288 (3)0.6833 (3)0.0229 (6)
H240.51191.02650.71900.027*
C250.4992 (3)0.8152 (2)0.6299 (3)0.0189 (5)
H250.62110.83740.62790.023*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Re0.00779 (7)0.01136 (7)0.01158 (6)0.00084 (5)0.00184 (5)−0.00043 (5)
I10.01743 (9)0.02567 (9)0.02152 (8)0.00406 (7)0.00338 (7)0.00427 (7)
I20.01598 (12)0.02278 (12)0.01852 (11)0.00268 (10)0.00608 (9)0.00035 (9)
O0.0099 (8)0.0144 (8)0.0166 (8)0.0008 (7)0.0020 (7)−0.0025 (7)
N10.0123 (10)0.0131 (9)0.0145 (9)0.0044 (8)0.0026 (8)−0.0003 (8)
C110.0131 (12)0.0146 (11)0.0182 (11)−0.0002 (10)0.0043 (10)−0.0013 (9)
C120.0291 (15)0.0172 (12)0.0199 (12)0.0060 (12)0.0101 (11)0.0051 (10)
C130.0314 (16)0.0256 (13)0.0152 (11)0.0152 (13)0.0064 (11)0.0039 (10)
C140.0191 (14)0.0289 (14)0.0170 (12)0.0088 (12)−0.0019 (10)−0.0021 (11)
C150.0141 (12)0.0178 (12)0.0181 (11)0.0005 (10)0.0029 (10)−0.0013 (10)
N20.0098 (10)0.0145 (9)0.0123 (9)0.0015 (8)0.0019 (8)0.0004 (8)
C210.0110 (12)0.0148 (11)0.0144 (11)−0.0006 (10)−0.0009 (9)−0.0027 (9)
C220.0112 (12)0.0230 (13)0.0182 (11)0.0046 (11)0.0040 (10)0.0020 (10)
C230.0192 (13)0.0187 (12)0.0236 (12)0.0080 (11)0.0076 (11)−0.0006 (10)
C240.0171 (13)0.0140 (12)0.0361 (14)0.0007 (11)0.0087 (12)−0.0061 (11)
C250.0127 (12)0.0163 (12)0.0268 (13)0.0003 (10)0.0067 (10)−0.0006 (10)
Geometric parameters (Å, °) top
Re—Oi1.7649 (18)C13—H130.9500
Re—O1.7649 (18)C14—C151.382 (3)
Re—N1i2.1411 (19)C14—H140.9500
Re—N12.1411 (19)C15—H150.9500
Re—N2i2.1442 (18)N2—C251.344 (3)
Re—N22.1442 (18)N2—C211.351 (3)
I1—I22.9222 (12)C21—C221.382 (3)
I2—I1ii2.9222 (12)C21—H210.9500
N1—C151.346 (3)C22—C231.378 (3)
N1—C111.368 (3)C22—H220.9500
C11—C121.375 (3)C23—C241.386 (3)
C11—H110.9500C23—H230.9500
C12—C131.375 (4)C24—C251.383 (3)
C12—H120.9500C24—H240.9500
C13—C141.383 (3)C25—H250.9500
Oi—Re—O180.0C12—C13—H13120.8
Oi—Re—N1i89.50 (8)C14—C13—H13120.8
O—Re—N1i90.50 (8)C15—C14—C13119.2 (3)
Oi—Re—N190.50 (8)C15—C14—H14120.4
O—Re—N189.50 (8)C13—C14—H14120.4
N1i—Re—N1180.0N1—C15—C14123.0 (2)
Oi—Re—N2i89.76 (7)N1—C15—H15118.5
O—Re—N2i90.24 (7)C14—C15—H15118.5
N1i—Re—N2i88.04 (7)C25—N2—C21117.65 (18)
N1—Re—N2i91.96 (7)C25—N2—Re121.51 (15)
Oi—Re—N290.24 (7)C21—N2—Re120.85 (15)
O—Re—N289.76 (7)N2—C21—C22122.8 (2)
N1i—Re—N291.96 (7)N2—C21—H21118.6
N1—Re—N288.04 (7)C22—C21—H21118.6
N2i—Re—N2180.0C23—C22—C21119.2 (2)
I1—I2—I1ii180.0C23—C22—H22120.4
C15—N1—C11117.36 (19)C21—C22—H22120.4
C15—N1—Re122.15 (15)C22—C23—C24118.4 (2)
C11—N1—Re120.48 (16)C22—C23—H23120.8
N1—C11—C12121.8 (2)C24—C23—H23120.8
N1—C11—H11119.1C25—C24—C23119.5 (2)
C12—C11—H11119.1C25—C24—H24120.2
C13—C12—C11120.3 (2)C23—C24—H24120.2
C13—C12—H12119.9N2—C25—C24122.4 (2)
C11—C12—H12119.9N2—C25—H25118.8
C12—C13—C14118.5 (2)C24—C25—H25118.8
Oi—Re—N1—C15−173.72 (16)Oi—Re—N2—C25−179.56 (17)
O—Re—N1—C156.28 (16)O—Re—N2—C250.44 (17)
N2i—Re—N1—C1596.50 (16)N1i—Re—N2—C25−90.05 (18)
N2—Re—N1—C15−83.50 (16)N1—Re—N2—C2589.95 (18)
Oi—Re—N1—C115.08 (14)Oi—Re—N2—C210.76 (16)
O—Re—N1—C11−174.92 (14)O—Re—N2—C21−179.24 (16)
N2i—Re—N1—C11−84.70 (15)N1i—Re—N2—C2190.27 (17)
N2—Re—N1—C1195.30 (15)N1—Re—N2—C21−89.73 (17)
C15—N1—C11—C12−1.0 (3)C25—N2—C21—C220.8 (3)
Re—N1—C11—C12−179.90 (15)Re—N2—C21—C22−179.55 (16)
N1—C11—C12—C130.7 (3)N2—C21—C22—C23−0.8 (3)
C11—C12—C13—C140.2 (3)C21—C22—C23—C24−0.2 (3)
C12—C13—C14—C15−0.7 (3)C22—C23—C24—C251.1 (4)
C11—N1—C15—C140.5 (3)C21—N2—C25—C240.2 (3)
Re—N1—C15—C14179.34 (16)Re—N2—C25—C24−179.47 (18)
C13—C14—C15—N10.4 (3)C23—C24—C25—N2−1.1 (4)
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) −x+2, −y+2, −z+2.
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
C15—H15···O0.952.392.914 (3)114
C25—H25···O0.952.382.906 (3)115
C11—H11···Oi0.952.392.913 (3)115
C21—H21···Oi0.952.372.908 (3)115
C22—H22···Oiii0.952.413.309 (3)157
Symmetry codes: (i) −x+1, −y+1, −z+1; (iii) x−1, y, z.
Table 1
Selected geometric parameters (Å) top
Re—O1.7649 (18)Re—N22.1442 (18)
Re—N12.1411 (19)I1—I22.9222 (12)
Table 2
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
C15—H15···O0.952.392.914 (3)114
C25—H25···O0.952.382.906 (3)115
C11—H11···Oi0.952.392.913 (3)115
C21—H21···Oi0.952.372.908 (3)115
C22—H22···Oii0.952.413.309 (3)157
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) x−1, y, z.
references
References top

Calvo, C., Krishnamachari, N. & Lock, C. J. L. (1971). J . Cryst. Mol. Struct. 1, 161–172

Janiak, C. (2000). J. Chem. Soc. Dalton Trans. pp. 3885–3896

Johnson, N. P., Lock, C. J. L. & Wilkinson, G. (1967). Inorg. Synth. 9, 145–148.

Lock, C. J. L. & Turner, G. (1978). Acta Cryst. B34, 923–927.

Luck, R. L. & O'Neill, R. S. (2001). Polyhedron, 28, 773–782.

Oxford Diffraction (2006). CrysAlis RED and CrysAlis CCD. Oxford Diffraction Poland, Wrocław, Poland.

Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122

Westrip, S. P. (2009). publCIF. In preparation.