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Acta Crystallographica Section E: Structure Reports Online logoLink to Acta Crystallographica Section E: Structure Reports Online
. 2007 Dec 18;64(Pt 1):i5. doi: 10.1107/S1600536807066354

Dicaesium tetra­chlorido­dioxido­plutonate(VI)

Marianne P Wilkerson a,*, Brian L Scott b
PMCID: PMC2914883  PMID: 21200455

Abstract

The anion of the title complex, Cs2[PuCl4O2], adopts a pseudo-octa­hedral geometry (2/m crystallographic site symmetry) with two plutonyl oxide ligands in axial sites and four chloride ligands occupying the equatorial plane. Charge balance is maintained by two caesium cations per tetra­chlorido­dioxido­plutonate(VI) anion. Principal bond lengths include Pu—O = 1.752 (3) Å and Pu—Cl = 2.6648 (8) Å.

Related literature

For related literature, see: Hall et al. (1966); Watkin et al. (1991); Wilkerson et al. (2004); Wilkerson et al. (2007); Bean et al. (2004, 2005); Grenthe et al. (2006); Grigoriev et al. (2004); Runde et al. (2003); Sessler et al. (2002).graphic file with name e-64-000i5-scheme1.jpg

Experimental

Crystal data

  • Cs2[PuCl4O2]

  • M r = 678.67

  • Monoclinic, Inline graphic

  • a = 11.9489 (7) Å

  • b = 7.7286 (5) Å

  • c = 5.7855 (4) Å

  • β = 96.439 (1)°

  • V = 530.91 (6) Å3

  • Z = 2

  • Mo Kα radiation

  • μ = 13.92 mm−1

  • T = 141 (2) K

  • 0.22 × 0.18 × 0.12 mm

Data collection

  • Bruker APEXII CCD diffractometer

  • Absorption correction: multi-scan (SADABS; Sheldrick, 2001) T min = 0.150, T max = 0.286 (expected range = 0.099–0.188)

  • 3212 measured reflections

  • 711 independent reflections

  • 659 reflections with I > 2σ(I)

  • R int = 0.025

Refinement

  • R[F 2 > 2σ(F 2)] = 0.015

  • wR(F 2) = 0.037

  • S = 1.26

  • 711 reflections

  • 27 parameters

  • Δρmax = 0.78 e Å−3

  • Δρmin = −0.64 e Å−3

Data collection: APEX2 (Bruker, 2003); cell refinement: SAINT-Plus (Bruker, 2001); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Bruker, 2000); software used to prepare material for publication: SHELXTL.

Supplementary Material

Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536807066354/fi2048sup1.cif

e-64-000i5-sup1.cif (15.7KB, cif)

Structure factors: contains datablocks I. DOI: 10.1107/S1600536807066354/fi2048Isup2.hkl

e-64-000i5-Isup2.hkl (35.5KB, hkl)

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

Acknowledgments

We thank Mr Phillip Palmer and Mr Sean D. Reilly for technical assistance. This research at Los Alamos National Laboratory was supported by NA-22, Office of Nonproliferation Research and Engineering, US Department of Energy, National Nuclear Security Administration (NNSA), and Office of Basic Energy Sciences, US Department of Energy. Los Alamos National Laboratory is operated by Los Alamos National Security, LLC for the US Department of Energy, NNSA under contract number DE-AC52-06NA25396.

supplementary crystallographic information

Comment

The title compound, (1), is isostructural with the uranium analogue Cs2U(VI)O2Cl4 and the neptunium analogue Cs2Np(VI)O2Cl4, which crystallize in the space group C2/m (Hall et al., 1966; Watkin et al., 1991; Wilkerson et al., 2007). The Pu atom sits on a site of 2/m crystallographic symmetry; the twofold rotation axis bisects the Cl—U—Cl angle, and the plutonyl axis lies in the mirror plane. The plutonium metal is coordinated in a pseudo-octahedral fashion by two oxo groups and four chloride ligands. The oxo groups of the plutonyl ion lie trans to one another with a bond angle of 180.0 (3). This angle is equivalent within 3 σ to those reported for the limited number of plutonyl structures published (range 178.0 (4)–179.4 (2)) (Bean et al., 2004; Bean et al., 2005; Grigoriev et al., 2004; Runde et al., 2003). This value is within the range reported for the majority of actinyl compounds (Grenthe et al., 2006). The Pu—O(oxo) distances are 1.752 (3) Å. Although there are no reported six coordinate plutonyl structures with which to compare, this value is within range of Pu—O(oxo) bond lengths reported for seven coordinate plutonyl structures (1.727 (4)–1.771 (11) Å) (Bean et al., 2004; Bean et al., 2005; Grigoriev et al., 2004; Runde et al., 2003). The chloride ligands lie in the equatorial plane of the plutonyl ion, and the Pu—Cl bond distances are 2.6648 (8) Å. Although there are no plutonyl chloride structures reported, these values are longer than Np—Cl bond lengths reported for six-coordinate Cs2NpO2Cl4 (2.653 (3) Å) (Wilkerson et al., 2004).

Experimental

Caesium chloride (0.021 g, 0.12 mmol; Aldrich, 99.999%) was dissolved in 2M HCl (0.5 ml; Aldrich, ACS reagent, 37%), and this solution was added to a stock solution of 0.063 M Pu(VI)O22+ in 2M HCl (1 ml, 0.063 mmol; Fisher, Certified ACS Plus) (Sessler et al., 2002). The vial containing the solution was covered loosely with parafilm and allowed to stand for 2 weeks at room temperature. Following evaporation of the solvent, dark golden-brown blocks formed. A dark golden-brown block of 0.22 x 0.18 x 0.12 mm was cut from a larger crystal, and then thinly coated with epoxy and placed in a capillary. The capillary was coated with a thin film of acrylic dissolved in ethyl acetate. (Note: this triple containment was necessitated by the health hazards of transuranic materials.)

Figures

Fig. 1.

Fig. 1.

Molecular structure (70% probability displacement ellipsoids) of Cs2PuO2Cl4 and the atom-numbering scheme used in Table 1. Symmetry codes as in Table 1.

Crystal data

Cs2[PuCl4O2] Z = 2
Mr = 678.67 F000 = 576
Monoclinic, C2/m Dx = 4.245 Mg m3
Hall symbol: -C 2y Mo Kα radiation λ = 0.71073 Å
a = 11.9489 (7) Å θ = 3.2–28.7º
b = 7.7286 (5) Å µ = 13.92 mm1
c = 5.7855 (4) Å T = 141 (2) K
β = 96.4390 (10)º Irregular, golden brown
V = 530.91 (6) Å3 0.22 × 0.18 × 0.12 mm

Data collection

Bruker D8 with APEXII CCD diffractometer 711 independent reflections
Radiation source: fine-focus sealed tube 659 reflections with I > 2σ(I)
Monochromator: graphite Rint = 0.025
T = 141(2) K θmax = 28.7º
ω scans θmin = 3.2º
Absorption correction: multi-scan(SADABS; Sheldrick, 2001) h = −15→15
Tmin = 0.150, Tmax = 0.286 k = −10→10
3212 measured reflections l = −7→7

Refinement

Refinement on F2 Secondary atom site location: difference Fourier map
Least-squares matrix: full   w = 1/[σ2(Fo2) + (0.0151P)2] where P = (Fo2 + 2Fc2)/3
R[F2 > 2σ(F2)] = 0.015 (Δ/σ)max = 0.001
wR(F2) = 0.037 Δρmax = 0.78 e Å3
S = 1.26 Δρmin = −0.64 e Å3
711 reflections Extinction correction: SHELXL97 (Sheldrick, 1997), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
27 parameters Extinction coefficient: 0.0050 (2)
Primary atom site location: structure-invariant direct methods

Special details

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)

x y z Uiso*/Ueq
Pu1 0.0000 0.0000 0.0000 0.02605 (11)
Cs1 0.34147 (2) 0.0000 0.69601 (6) 0.03801 (11)
Cl1 −0.10351 (7) −0.24889 (10) 0.21367 (16) 0.0390 (2)
O1 0.1124 (3) 0.0000 0.2222 (6) 0.0395 (8)

Atomic displacement parameters (Å2)

U11 U22 U33 U12 U13 U23
Pu1 0.02849 (15) 0.02078 (14) 0.02946 (15) 0.000 0.00583 (9) 0.000
Cs1 0.03790 (19) 0.03608 (19) 0.0419 (2) 0.000 0.01250 (15) 0.000
Cl1 0.0436 (4) 0.0305 (4) 0.0454 (5) −0.0015 (3) 0.0162 (4) 0.0058 (3)
O1 0.0381 (19) 0.0424 (19) 0.0371 (19) 0.000 0.0002 (16) 0.000

Geometric parameters (Å, °)

Pu1—O1i 1.752 (3) Cs1—Cl1xii 3.5201 (8)
Pu1—O1 1.752 (3) Cs1—Cl1viii 3.5201 (8)
Pu1—Cl1ii 2.6648 (8) Cs1—Cl1xiii 3.5674 (10)
Pu1—Cl1 2.6648 (8) Cs1—Cl1xiv 3.5674 (10)
Pu1—Cl1iii 2.6648 (8) Cs1—O1 3.650 (4)
Pu1—Cl1i 2.6648 (8) Cs1—Cl1xv 3.6710 (9)
Pu1—Cs1iv 4.5680 (3) Cs1—Cl1vi 3.6710 (9)
Pu1—Cs1v 4.5680 (3) Cs1—Pu1xiii 4.5680 (3)
Pu1—Cs1vi 4.5680 (3) Cs1—Pu1xvi 4.5680 (3)
Pu1—Cs1vii 4.5680 (3) Cs1—Pu1xvii 4.6207 (3)
Pu1—Cs1viii 4.6207 (3) Cl1—Cs1xviii 3.5209 (9)
Pu1—Cs1ix 4.6207 (3) Cl1—Cs1viii 3.5201 (8)
Cs1—Cl1x 3.5209 (9) Cl1—Cs1iv 3.5674 (10)
Cs1—Cl1xi 3.5209 (9) Cl1—Cs1vi 3.6710 (9)
O1i—Pu1—O1 180.0 (3) Cl1x—Cs1—Cl1xiii 158.75 (3)
O1i—Pu1—Cl1ii 90.98 (8) Cl1xi—Cs1—Cl1xiii 109.41 (2)
O1—Pu1—Cl1ii 89.02 (8) Cl1xii—Cs1—Cl1xiii 104.390 (15)
O1i—Pu1—Cl1 89.02 (8) Cl1viii—Cs1—Cl1xiii 69.76 (2)
O1—Pu1—Cl1 90.98 (8) Cl1x—Cs1—Cl1xiv 109.41 (2)
Cl1ii—Pu1—Cl1 87.58 (3) Cl1xi—Cs1—Cl1xiv 158.75 (3)
O1i—Pu1—Cl1iii 89.02 (8) Cl1xii—Cs1—Cl1xiv 69.76 (2)
O1—Pu1—Cl1iii 90.98 (8) Cl1viii—Cs1—Cl1xiv 104.390 (15)
Cl1ii—Pu1—Cl1iii 180.00 (5) Cl1xiii—Cs1—Cl1xiv 65.91 (3)
Cl1—Pu1—Cl1iii 92.42 (3) Cl1x—Cs1—O1 66.15 (5)
O1i—Pu1—Cl1i 90.98 (8) Cl1xi—Cs1—O1 66.15 (5)
O1—Pu1—Cl1i 89.02 (8) Cl1xii—Cs1—O1 63.98 (5)
Cl1ii—Pu1—Cl1i 92.42 (3) Cl1viii—Cs1—O1 63.98 (5)
Cl1—Pu1—Cl1i 180.00 (4) Cl1xiii—Cs1—O1 133.04 (4)
Cl1iii—Pu1—Cl1i 87.58 (3) Cl1xiv—Cs1—O1 133.04 (4)
O1i—Pu1—Cs1iv 57.778 (4) Cl1x—Cs1—Cl1xv 99.912 (18)
O1—Pu1—Cs1iv 122.222 (4) Cl1xi—Cs1—Cl1xv 65.75 (3)
Cl1ii—Pu1—Cs1iv 53.469 (18) Cl1xii—Cs1—Cl1xv 163.34 (3)
Cl1—Pu1—Cs1iv 51.24 (2) Cl1viii—Cs1—Cl1xv 112.348 (8)
Cl1iii—Pu1—Cs1iv 126.531 (18) Cl1xiii—Cs1—Cl1xv 61.25 (2)
Cl1i—Pu1—Cs1iv 128.76 (2) Cl1xiv—Cs1—Cl1xv 95.403 (19)
O1i—Pu1—Cs1v 122.222 (4) O1—Cs1—Cl1xv 131.50 (4)
O1—Pu1—Cs1v 57.778 (4) Cl1x—Cs1—Cl1vi 65.75 (3)
Cl1ii—Pu1—Cs1v 126.531 (18) Cl1xi—Cs1—Cl1vi 99.912 (18)
Cl1—Pu1—Cs1v 128.76 (2) Cl1xii—Cs1—Cl1vi 112.348 (8)
Cl1iii—Pu1—Cs1v 53.469 (18) Cl1viii—Cs1—Cl1vi 163.34 (3)
Cl1i—Pu1—Cs1v 51.24 (2) Cl1xiii—Cs1—Cl1vi 95.403 (19)
Cs1iv—Pu1—Cs1v 180.000 (8) Cl1xiv—Cs1—Cl1vi 61.25 (2)
O1i—Pu1—Cs1vi 122.222 (4) O1—Cs1—Cl1vi 131.50 (4)
O1—Pu1—Cs1vi 57.778 (4) Cl1xv—Cs1—Cl1vi 63.83 (3)
Cl1ii—Pu1—Cs1vi 51.24 (2) Cl1x—Cs1—Pu1xiii 131.698 (14)
Cl1—Pu1—Cs1vi 53.469 (18) Cl1xi—Cs1—Pu1xiii 74.494 (15)
Cl1iii—Pu1—Cs1vi 128.76 (2) Cl1xii—Cs1—Pu1xiii 135.406 (14)
Cl1i—Pu1—Cs1vi 126.531 (18) Cl1viii—Cs1—Pu1xiii 77.734 (14)
Cs1iv—Pu1—Cs1vi 64.454 (8) Cl1xiii—Cs1—Pu1xiii 35.626 (12)
Cs1v—Pu1—Cs1vi 115.546 (8) Cl1xiv—Cs1—Pu1xiii 96.174 (16)
O1i—Pu1—Cs1vii 57.778 (4) O1—Cs1—Pu1xiii 122.194 (5)
O1—Pu1—Cs1vii 122.222 (4) Cl1xv—Cs1—Pu1xiii 35.683 (12)
Cl1ii—Pu1—Cs1vii 128.76 (2) Cl1vi—Cs1—Pu1xiii 94.713 (15)
Cl1—Pu1—Cs1vii 126.531 (18) Cl1x—Cs1—Pu1xvi 74.494 (15)
Cl1iii—Pu1—Cs1vii 51.24 (2) Cl1xi—Cs1—Pu1xvi 131.698 (14)
Cl1i—Pu1—Cs1vii 53.469 (18) Cl1xii—Cs1—Pu1xvi 77.734 (14)
Cs1iv—Pu1—Cs1vii 115.546 (8) Cl1viii—Cs1—Pu1xvi 135.406 (14)
Cs1v—Pu1—Cs1vii 64.454 (8) Cl1xiii—Cs1—Pu1xvi 96.174 (16)
Cs1vi—Pu1—Cs1vii 180.000 (7) Cl1xiv—Cs1—Pu1xvi 35.626 (12)
O1i—Pu1—Cs1viii 69.04 (11) O1—Cs1—Pu1xvi 122.194 (5)
O1—Pu1—Cs1viii 110.96 (11) Cl1xv—Cs1—Pu1xvi 94.713 (15)
Cl1ii—Pu1—Cs1viii 130.706 (17) Cl1vi—Cs1—Pu1xvi 35.683 (12)
Cl1—Pu1—Cs1viii 49.294 (17) Pu1xiii—Cs1—Pu1xvi 115.546 (8)
Cl1iii—Pu1—Cs1viii 49.294 (17) Cl1x—Cs1—Pu1xvii 123.572 (15)
Cl1i—Pu1—Cs1viii 130.706 (17) Cl1xi—Cs1—Pu1xvii 123.572 (15)
Cs1iv—Pu1—Cs1viii 78.510 (5) Cl1xii—Cs1—Pu1xvii 35.021 (13)
Cs1v—Pu1—Cs1viii 101.490 (5) Cl1viii—Cs1—Pu1xvii 35.021 (13)
Cs1vi—Pu1—Cs1viii 101.490 (5) Cl1xiii—Cs1—Pu1xvii 76.579 (13)
Cs1vii—Pu1—Cs1viii 78.510 (5) Cl1xiv—Cs1—Pu1xvii 76.579 (13)
O1i—Pu1—Cs1ix 110.96 (11) O1—Cs1—Pu1xvii 70.49 (5)
O1—Pu1—Cs1ix 69.04 (11) Cl1xv—Cs1—Pu1xvii 136.161 (13)
Cl1ii—Pu1—Cs1ix 49.294 (17) Cl1vi—Cs1—Pu1xvii 136.161 (13)
Cl1—Pu1—Cs1ix 130.706 (17) Pu1xiii—Cs1—Pu1xvii 101.490 (5)
Cl1iii—Pu1—Cs1ix 130.706 (17) Pu1xvi—Cs1—Pu1xvii 101.490 (5)
Cl1i—Pu1—Cs1ix 49.294 (17) Pu1—Cl1—Cs1xviii 154.58 (3)
Cs1iv—Pu1—Cs1ix 101.490 (5) Pu1—Cl1—Cs1viii 95.68 (2)
Cs1v—Pu1—Cs1ix 78.510 (5) Cs1xviii—Cl1—Cs1viii 87.583 (18)
Cs1vi—Pu1—Cs1ix 78.510 (5) Pu1—Cl1—Cs1iv 93.13 (2)
Cs1vii—Pu1—Cs1ix 101.490 (5) Cs1xviii—Cl1—Cs1iv 109.41 (2)
Cs1viii—Pu1—Cs1ix 180.000 (3) Cs1viii—Cl1—Cs1iv 110.24 (2)
Cl1x—Cs1—Cl1xi 66.90 (3) Pu1—Cl1—Cs1vi 90.85 (2)
Cl1x—Cs1—Cl1xii 92.417 (18) Cs1xviii—Cl1—Cs1vi 80.088 (18)
Cl1xi—Cs1—Cl1xii 130.133 (13) Cs1viii—Cl1—Cs1vi 163.34 (3)
Cl1x—Cs1—Cl1viii 130.133 (13) Cs1iv—Cl1—Cs1vi 84.597 (19)
Cl1xi—Cs1—Cl1viii 92.417 (18) Pu1—O1—Cs1 178.55 (16)
Cl1xii—Cs1—Cl1viii 66.25 (3)

Symmetry codes: (i) −x, −y, −z; (ii) −x, y, −z; (iii) x, −y, z; (iv) x−1/2, y−1/2, z−1; (v) −x+1/2, −y+1/2, −z+1; (vi) −x+1/2, −y−1/2, −z+1; (vii) x−1/2, y+1/2, z−1; (viii) −x, −y, −z+1; (ix) x, y, z−1; (x) x+1/2, −y−1/2, z; (xi) x+1/2, y+1/2, z; (xii) −x, y, −z+1; (xiii) x+1/2, y+1/2, z+1; (xiv) x+1/2, −y−1/2, z+1; (xv) −x+1/2, y+1/2, −z+1; (xvi) x+1/2, y−1/2, z+1; (xvii) x, y, z+1; (xviii) x−1/2, y−1/2, z.

Footnotes

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: FI2048).

References

  1. Bean, A. C., Abney, K., Scott, B. L. & Runde, W. (2005). Inorg. Chem.44, 5209–5211. [DOI] [PubMed]
  2. Bean, A. C., Albrecht-Schmitt, T. E. & Runde, W. (2004). J. Solid State Chem.177, 1346–1351.
  3. Bruker (2000). SHELXTL Version 6.10. Bruker AXS Inc., Madison, Wisconsin, USA.
  4. Bruker (2001). SAINT-Plus Version 7.06. Bruker AXS Inc., Madison, Wisconsin, USA.
  5. Bruker (2003). APEX2. Version 1.08. Bruker AXS Inc., Madison, Wisconsin, USA.
  6. Grenthe, I., Drozdzynski, J., Fujino, T., Buck, E. C., Albrecht-Schmitt, T. E. & Wolf, S. F. (2006). The Chemistry of the Actinide and Transactinide Elements, Vol. 1, ch. 5, edited by L. R. Morrs, N. M. Edelstein, J. Fuger & J. J. Katz, 3rd ed., p. 578. Dordrecht: Springer.
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  10. Sessler, J. L., Gorden, A. E. V., Seidel, D., Hannah, S., Lynch, V., Gordon, P. L., Donohoe, R. J., Tait, C. D. & Keogh, D. W. (2002). Inorg. Chim. Acta, 341, 54–70.
  11. Sheldrick, G. M. (1997). SHELXS97 and SHELXL97 University of Göttingen, Germany.
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  15. Wilkerson, M. P., Dewey, H. J., Gordon, P. L. & Scott, B. L. (2004). J. Chem. Crystallogr.34, 807–811.

Associated Data

This section collects any data citations, data availability statements, or supplementary materials included in this article.

Supplementary Materials

Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536807066354/fi2048sup1.cif

e-64-000i5-sup1.cif (15.7KB, cif)

Structure factors: contains datablocks I. DOI: 10.1107/S1600536807066354/fi2048Isup2.hkl

e-64-000i5-Isup2.hkl (35.5KB, hkl)

Additional supplementary materials: crystallographic information; 3D view; checkCIF report


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