(IUCr) Tetrapotassium diantimony(III) tin(IV) tetradecafluoride

Volume 64
Part 6
Page i32
June 2008

Received 28 April 2008
Accepted 1 May 2008
Online 7 May 2008

Key indicators
Single-crystal X-ray study
T = 298 K
Mean (Sn-F) = 0.002 Å
R = 0.038
wR = 0.091
Data-to-parameter ratio = 47.3
Details

Tetrapotassium diantimony(III) tin(IV) tetradecafluoride

A. V. Gerasimenko,^a ^* E. B. Merkulov ^a and T. I. Usol'tseva ^a

^aInstitute of Chemistry FEB RAS, 159 prospekt 100-letiya Vladivostoka, Vladivostok 690022, Russian Federation
Correspondence e-mail: gerasimenko@ich.dvo.ru

The title compound, K₄Sb₂SnF₁₄, is built from anionic layers, with an overall composition of [Sb₂SnF₁₄]^4- extending parallel to the ac plane, and K⁺ cations. The layers are made up from vertex-sharing centrosymmetric SnF₆ octahedra and Sb₂F₁₂ dimers. The Sn-F distances are in the range 1.9581 (14)-1.9611 (17) Å. The Sb polyhedra contain three short terminal Sb-F bonds [1.9380 (14)-2.0696 (15) Å], one short bridging bond [2.0609 (17) Å], one bridging bond of medium length [2.7516 (15) Å], and two longer bridging bonds [3.0471 (18) and 3.117 (2) Å]. The K⁺ ions are coordinated by F atoms with coordination numbers 10 and 8, and K-F bond lengths are in the range 2.6235 (16)-3.122 (2) Å.

Related literature

For related literature, see: Blatov (2004); Davidovich & Zemnukhova (1975); Gillespie (1970); Kriegsmann & Kessler (1962); Serezhkin et al. (1997).

Experimental

Crystal data

K₄Sb₂SnF₁₄
M_r = 784.59
Triclinic, $[P \overline 1]$
a = 6.7356 (2) Å
b = 7.4704 (2) Å
c = 7.6370 (2) Å
= 92.691 (1)°
= 91.461 (1)°
= 115.323 (1)°
V = 346.53 (2) Å³
Z = 1
Mo K radiation
= 7.00 mm^-1
T = 298 (2) K
0.4 × 0.35 × 0.28 mm

Data collection

Bruker SMART 1000 CCD area-detector diffractometer
Absorption correction: Gaussian (XPREP and SADABS; Bruker, 2003) T_min = 0.136, T_max = 0.291
7147 measured reflections
4635 independent reflections
4250 reflections with I > 2(I)
R_int = 0.024

Refinement

R[F² > 2(F²)] = 0.037
wR(F²) = 0.090
S = 1.30
4635 reflections
98 parameters
_max = 1.91 e Å^-3
_min = -3.69 e Å^-3

Table 1
Selected bond lengths (Å)

Sb-F1	1.9380 (14)
Sb-F3	1.9539 (13)
Sb-F4	2.0609 (17)
Sb-F2	2.0696 (15)
Sb-F4ⁱ	2.7516 (15)
Sb-F5ⁱⁱ	3.0471 (18)
Sb-F6	3.117 (2)
Sn-F5	1.9581 (14)
Sn-F7	1.9611 (17)
Sn-F6	1.9611 (16)
K1-F4^iv	2.6235 (16)
K1-F2	2.7086 (14)
K1-F1^v	2.7268 (16)
K1-F6^vi	2.811 (2)
K1-F3^iv	2.8390 (18)
K1-F5^iv	2.8578 (16)
K1-F1	2.9262 (15)
K1-F3	2.9485 (18)
K1-F4^vi	2.982 (2)
K1-F7^vi	3.122 (2)
K2-F2^vii	2.6662 (15)
K2-F2^v	2.6777 (18)
K2-F3^iv	2.7136 (15)
K2-F1	2.7216 (15)
K2-F7^viii	2.7620 (19)
K2-F7^ix	2.8795 (17)
K2-F6ⁱ	2.8943 (16)
K2-F5^iv	2.9912 (18)
Symmetry codes: (i) -x+1, -y, -z+1; (ii) x-1, y, z; (iii) -x+2, -y, -z; (iv) -x+2, -y+1, -z+1; (v) -x+1, -y+1, -z+1; (vi) x, y+1, z; (vii) x, y, z+1; (viii) -x+2, -y, -z+1; (ix) x, y+1, z+1.

Data collection: SMART (Bruker, 1998); cell refinement: SAINT (Bruker, 2003); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: XP in SHELXTL; software used to prepare material for publication: publCIF (Westrip, 2008).

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: FI2062 ).

Acknowledgements

The authors thank the Russian Foundation for Basic Research (project No. 08-03-00355) for financial support.

References

Blatov, V. A. (2004). Crystallogr. Rev. 10, 249-318.
Bruker (1998). SMART. Bruker AXS Inc., Madison, Wisconsin, USA.
Bruker (2003). SAINT, XPREP and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.
Davidovich, R. L. & Zemnukhova, L. A. (1975). Koord. Khim. 1, 477-481.
Gillespie, R. J. (1970). J. Chem. Educ. 47, 18-23.
Kriegsmann, H. & Kessler, G. (1962). Z. Anorg. Allg. Chem. 318, 266-276.
Serezhkin, V. N., Mikhailov, Yu. N. & Buslaev, Yu. A. (1997). Zh. Neorg. Khim. 42, 2036-2077.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Westrip, S. P. (2008). publCIF. In preparation.

inorganic compounds