metal-organic compounds
Poly[1,4-bis(ammoniomethyl)cyclohexane [di-μ-iodido-diiodidoplumbate(II)]]
aMolecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag 3, PO Wits 2050, South Africa
*Correspondence e-mail: david.billing@wits.ac.za
The title compound, {(C8H20N2)[PbI4]}n, is an inorganic–organic hybrid. The structure is composed of alternate layers of two-dimensional corner-sharing PbI6 octahedra ( symmetry) and 1,4-bis(ammoniomethyl)cyclohexane cations ( symmetry) extending parallel to the bc plane. The cations interact with the inorganic layer via N—H⋯I hydrogen bonding in the right-angled halogen sub-type of the terminal halide hydrogen-bonding motif.
Related literature
For other examples of inorganic–organic hybrid structures encorporating cyclic ammonium cations, see: Billing & Lemmerer (2006). For hydrogen-bonding nomenclature for inorganic–organic hybrids, see: Mitzi (1999). For the related chloridoplumbate(II), see: Rayner & Billing (2010a) and for the isotypic bromidoplumbate(II), see: Rayner & Billing (2010b).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2005); cell SAINT (Bruker, 2005); 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 for Windows (Farrugia, 1997) and DIAMOND (Brandenburg, 1999); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON (Spek, 2009).
Supporting information
https://doi.org/10.1107/S160053681001682X/wm2340sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S160053681001682X/wm2340Isup2.hkl
A mixture of 0.050 g (0.11 mmol) PbI2 and 0.017 g (0.17 mmol) 1,4-bis-(aminomethyl)-cyclohexane (mixture of isomers) was dissolved in 5 ml HI at 383 K and slow cooled at a rate of 0.069 K/min to yield yellow, plate-shaped single crystals suitable for X-ray analysis.
The H atoms on the diammonium cation were refined using a riding-model, with C—H = 0.99 Å, N—H = 0.91 Å and with Uiso(H)=1.2Ueq(C) or 1.5Ueq(N). The highest residual electron density peak (1.76 e Å-3) was 0.955Å from Pb1.
The title structure (Fig. 1) is one of three 2-dimensional hybrid structures that we have synthesized encorporating this diammonium cation. The structures differ in terms of their halogen ligands, which include iodide (presented here), the bromide (Rayner & Billing, 2010b) and chloride (Rayner & Billing, 2010a). The bromide and iodide hybrids are isotypic and crystallize in the monoclinic system with
P21/c while the chloride hybrid crystallizes in the orthorhombic, Pnma system.In the structure of the title compound the lead atoms in the PbI6 octahedra occupy inversion centers, giving the octahedra 1 symmetry. The PbI6 octahedra share corners to form layers extending parallel to the bc plane. Octahedra from alternate layers are eclipsed relative to one another (Fig. 2). In all three structures only the trans form of the cation has been observed, giving the cation 1 symmetry (Fig. 3). The ammonium cations interact with the inorganic layer via N—H···X (X = Br, I and Cl) hydrogen bonding in the right-angled halogen subtype of the terminal halide hydrogen bonding motif (Mitzi, 1999). Billing & Lemmerer (2006) reported a series of inorganic-organic hybrids encorpoating cyclic ammonium cations, however no diammonium cations were synthesized.
For other examples of inorganic–organic hybrid structures encorporating cyclic ammonium cations, see: Billing & Lemmerer (2006). For hydrogen-bonding nomenclature for inorganic–organic hybrids, see: Mitzi (1999). For the related chloridoplumbate(II), see: Rayner & Billing (2010a) and for the isotypic bromidoplumbate(II), see: Rayner & Billing (2010b).
Data collection: APEX2 (Bruker, 2005); cell
SAINT (Bruker, 2005); data reduction: SAINT (Bruker, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and DIAMOND (Brandenburg, 1999); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON (Spek, 2009).(C8H20N2)[PbI4] | F(000) = 752 |
Mr = 859.05 | Dx = 3.043 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 6011 reflections |
a = 12.2793 (17) Å | θ = 3.0–28.2° |
b = 8.7413 (12) Å | µ = 15.56 mm−1 |
c = 8.7829 (13) Å | T = 173 K |
β = 95.922 (3)° | Plate, orange |
V = 937.7 (2) Å3 | 0.36 × 0.26 × 0.08 mm |
Z = 2 |
Bruker APEXII CCD area-detector diffractometer | 2264 independent reflections |
Radiation source: fine-focus sealed tube | 2085 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.080 |
φ and ω scans | θmax = 28.0°, θmin = 1.7° |
Absorption correction: integration (XPREP; Bruker, 2005) | h = −16→16 |
Tmin = 0.043, Tmax = 0.288 | k = −11→10 |
5435 measured reflections | l = −9→11 |
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)] = 0.033 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.093 | H-atom parameters constrained |
S = 1.08 | w = 1/[σ2(Fo2) + (0.0511P)2 + 1.0393P] where P = (Fo2 + 2Fc2)/3 |
2264 reflections | (Δ/σ)max = 0.009 |
70 parameters | Δρmax = 1.76 e Å−3 |
0 restraints | Δρmin = −2.79 e Å−3 |
(C8H20N2)[PbI4] | V = 937.7 (2) Å3 |
Mr = 859.05 | Z = 2 |
Monoclinic, P21/c | Mo Kα radiation |
a = 12.2793 (17) Å | µ = 15.56 mm−1 |
b = 8.7413 (12) Å | T = 173 K |
c = 8.7829 (13) Å | 0.36 × 0.26 × 0.08 mm |
β = 95.922 (3)° |
Bruker APEXII CCD area-detector diffractometer | 2264 independent reflections |
Absorption correction: integration (XPREP; Bruker, 2005) | 2085 reflections with I > 2σ(I) |
Tmin = 0.043, Tmax = 0.288 | Rint = 0.080 |
5435 measured reflections |
R[F2 > 2σ(F2)] = 0.033 | 0 restraints |
wR(F2) = 0.093 | H-atom parameters constrained |
S = 1.08 | Δρmax = 1.76 e Å−3 |
2264 reflections | Δρmin = −2.79 e Å−3 |
70 parameters |
Experimental. Numerical intergration absorption corrections based on indexed crystal faces were applied using the XPREP routine (Bruker, 2005) |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 | ||
C1 | 0.2676 (6) | 0.0434 (9) | −0.4667 (9) | 0.0333 (15) | |
H1A | 0.2773 | 0.1355 | −0.4011 | 0.040* | |
H1B | 0.2216 | 0.0719 | −0.5617 | 0.040* | |
C2 | 0.3794 (6) | −0.0123 (8) | −0.5065 (8) | 0.0273 (15) | |
H2 | 0.3672 | −0.0991 | −0.5804 | 0.033* | |
C3 | 0.4366 (6) | 0.1194 (9) | −0.5867 (8) | 0.0306 (14) | |
H3A | 0.3890 | 0.1529 | −0.6785 | 0.037* | |
H3B | 0.4475 | 0.2077 | −0.5162 | 0.037* | |
C4 | 0.4542 (6) | −0.0685 (9) | −0.3667 (8) | 0.0299 (14) | |
H4A | 0.4654 | 0.0151 | −0.2906 | 0.036* | |
H4B | 0.4187 | −0.1550 | −0.3183 | 0.036* | |
N1 | 0.2111 (5) | −0.0797 (7) | −0.3841 (6) | 0.0274 (12) | |
H1C | 0.1450 | −0.0448 | −0.3610 | 0.041* | |
H1D | 0.2531 | −0.1050 | −0.2962 | 0.041* | |
H1E | 0.2012 | −0.1637 | −0.4451 | 0.041* | |
I1 | −0.26315 (4) | 0.02539 (5) | −0.02301 (5) | 0.02714 (13) | |
I2 | 0.00031 (4) | 0.18981 (5) | −0.30914 (4) | 0.02605 (14) | |
Pb1 | 0.0000 | 0.0000 | 0.0000 | 0.01915 (11) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.036 (4) | 0.026 (3) | 0.039 (4) | 0.002 (3) | 0.005 (3) | 0.004 (3) |
C2 | 0.027 (4) | 0.027 (4) | 0.028 (3) | −0.003 (3) | 0.003 (3) | −0.001 (2) |
C3 | 0.028 (3) | 0.030 (3) | 0.034 (3) | 0.000 (3) | 0.001 (3) | 0.010 (3) |
C4 | 0.023 (3) | 0.035 (4) | 0.031 (3) | −0.003 (3) | 0.002 (3) | 0.008 (3) |
N1 | 0.025 (3) | 0.031 (3) | 0.026 (3) | −0.004 (2) | 0.003 (2) | −0.001 (2) |
I1 | 0.0262 (2) | 0.0257 (2) | 0.0288 (2) | −0.00327 (17) | −0.00048 (18) | −0.00028 (16) |
I2 | 0.0356 (2) | 0.0218 (2) | 0.0212 (2) | 0.00569 (16) | 0.00513 (16) | 0.00779 (14) |
Pb1 | 0.02537 (19) | 0.01599 (17) | 0.01602 (16) | 0.00087 (11) | 0.00182 (12) | 0.00032 (10) |
C1—N1 | 1.507 (9) | C4—H4B | 0.9900 |
C1—C2 | 1.530 (10) | N1—H1C | 0.9100 |
C1—H1A | 0.9900 | N1—H1D | 0.9100 |
C1—H1B | 0.9900 | N1—H1E | 0.9100 |
C2—C4 | 1.536 (10) | I1—Pb1 | 3.2243 (6) |
C2—C3 | 1.554 (9) | I2—Pb1 | 3.1824 (5) |
C2—H2 | 1.0000 | I2—Pb1ii | 3.1875 (5) |
C3—C4i | 1.510 (10) | Pb1—I2iii | 3.1824 (5) |
C3—H3A | 0.9900 | Pb1—I2iv | 3.1875 (5) |
C3—H3B | 0.9900 | Pb1—I2v | 3.1875 (5) |
C4—C3i | 1.510 (10) | Pb1—I1iii | 3.2243 (6) |
C4—H4A | 0.9900 | ||
N1—C1—C2 | 110.5 (6) | H4A—C4—H4B | 108.1 |
N1—C1—H1A | 109.5 | C1—N1—H1C | 109.5 |
C2—C1—H1A | 109.5 | C1—N1—H1D | 109.5 |
N1—C1—H1B | 109.5 | H1C—N1—H1D | 109.5 |
C2—C1—H1B | 109.5 | C1—N1—H1E | 109.5 |
H1A—C1—H1B | 108.1 | H1C—N1—H1E | 109.5 |
C4—C2—C1 | 113.3 (6) | H1D—N1—H1E | 109.5 |
C4—C2—C3 | 109.8 (6) | Pb1—I2—Pb1ii | 153.144 (15) |
C1—C2—C3 | 109.0 (6) | I2—Pb1—I2iii | 180.00 (2) |
C4—C2—H2 | 108.2 | I2—Pb1—I2iv | 90.294 (11) |
C1—C2—H2 | 108.2 | I2iii—Pb1—I2iv | 89.706 (11) |
C3—C2—H2 | 108.2 | I2—Pb1—I2v | 89.706 (11) |
C4i—C3—C2 | 111.1 (6) | I2iii—Pb1—I2v | 90.294 (11) |
C4i—C3—H3A | 109.4 | I2iv—Pb1—I2v | 180.0 |
C2—C3—H3A | 109.4 | I2—Pb1—I1iii | 89.999 (12) |
C4i—C3—H3B | 109.4 | I2iii—Pb1—I1iii | 90.001 (12) |
C2—C3—H3B | 109.4 | I2iv—Pb1—I1iii | 94.518 (12) |
H3A—C3—H3B | 108.0 | I2v—Pb1—I1iii | 85.482 (12) |
C3i—C4—C2 | 110.6 (6) | I2—Pb1—I1 | 90.001 (12) |
C3i—C4—H4A | 109.5 | I2iii—Pb1—I1 | 89.999 (12) |
C2—C4—H4A | 109.5 | I2iv—Pb1—I1 | 85.482 (12) |
C3i—C4—H4B | 109.5 | I2v—Pb1—I1 | 94.518 (12) |
C2—C4—H4B | 109.5 | I1iii—Pb1—I1 | 180.0 |
N1—C1—C2—C4 | −55.7 (8) | C3—C2—C4—C3i | −57.0 (9) |
N1—C1—C2—C3 | −178.2 (6) | Pb1ii—I2—Pb1—I2iv | −0.35 (4) |
C4—C2—C3—C4i | 57.3 (8) | Pb1ii—I2—Pb1—I2v | 179.65 (4) |
C1—C2—C3—C4i | −178.1 (6) | Pb1ii—I2—Pb1—I1iii | −94.87 (4) |
C1—C2—C4—C3i | −179.1 (6) | Pb1ii—I2—Pb1—I1 | 85.13 (4) |
Symmetry codes: (i) −x+1, −y, −z−1; (ii) −x, y+1/2, −z−1/2; (iii) −x, −y, −z; (iv) x, −y+1/2, z+1/2; (v) −x, y−1/2, −z−1/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1D···I1iii | 0.91 | 2.88 | 3.598 (5) | 137 |
N1—H1E···I1v | 0.91 | 2.84 | 3.619 (6) | 144 |
N1—H1E···I2vi | 0.91 | 3.12 | 3.672 (6) | 121 |
N1—H1C···I2 | 0.91 | 2.78 | 3.611 (6) | 152 |
Symmetry codes: (iii) −x, −y, −z; (v) −x, y−1/2, −z−1/2; (vi) −x, −y, −z−1. |
Experimental details
Crystal data | |
Chemical formula | (C8H20N2)[PbI4] |
Mr | 859.05 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 173 |
a, b, c (Å) | 12.2793 (17), 8.7413 (12), 8.7829 (13) |
β (°) | 95.922 (3) |
V (Å3) | 937.7 (2) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 15.56 |
Crystal size (mm) | 0.36 × 0.26 × 0.08 |
Data collection | |
Diffractometer | Bruker APEXII CCD area-detector |
Absorption correction | Integration (XPREP; Bruker, 2005) |
Tmin, Tmax | 0.043, 0.288 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5435, 2264, 2085 |
Rint | 0.080 |
(sin θ/λ)max (Å−1) | 0.660 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.033, 0.093, 1.08 |
No. of reflections | 2264 |
No. of parameters | 70 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 1.76, −2.79 |
Computer programs: APEX2 (Bruker, 2005), SAINT (Bruker, 2005), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997) and DIAMOND (Brandenburg, 1999), WinGX (Farrugia, 1999) and PLATON (Spek, 2009).
Pb1—I2i | 3.1824 (5) | Pb1—I1i | 3.2243 (6) |
Pb1—I2ii | 3.1875 (5) |
Symmetry codes: (i) −x, −y, −z; (ii) x, −y+1/2, z+1/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1D···I1i | 0.91 | 2.88 | 3.598 (5) | 137 |
N1—H1E···I1iii | 0.91 | 2.84 | 3.619 (6) | 144 |
N1—H1E···I2iv | 0.91 | 3.12 | 3.672 (6) | 121 |
N1—H1C···I2 | 0.91 | 2.78 | 3.611 (6) | 152 |
Symmetry codes: (i) −x, −y, −z; (iii) −x, y−1/2, −z−1/2; (iv) −x, −y, −z−1. |
Acknowledgements
The University of the Witwatersrand and the National Research Fund (GUN: 2069064) are acknowledged for the funding and infrastructure required to perform the experiment.
References
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The title structure (Fig. 1) is one of three 2-dimensional hybrid structures that we have synthesized encorporating this diammonium cation. The structures differ in terms of their halogen ligands, which include iodide (presented here), the bromide (Rayner & Billing, 2010b) and chloride (Rayner & Billing, 2010a). The bromide and iodide hybrids are isotypic and crystallize in the monoclinic system with space group P21/c while the chloride hybrid crystallizes in the orthorhombic, Pnma system.
In the structure of the title compound the lead atoms in the PbI6 octahedra occupy inversion centers, giving the octahedra 1 symmetry. The PbI6 octahedra share corners to form layers extending parallel to the bc plane. Octahedra from alternate layers are eclipsed relative to one another (Fig. 2). In all three structures only the trans form of the cation has been observed, giving the cation 1 symmetry (Fig. 3). The ammonium cations interact with the inorganic layer via N—H···X (X = Br, I and Cl) hydrogen bonding in the right-angled halogen subtype of the terminal halide hydrogen bonding motif (Mitzi, 1999). Billing & Lemmerer (2006) reported a series of inorganic-organic hybrids encorpoating cyclic ammonium cations, however no diammonium cations were synthesized.