catena-Poly[[(tetra­hydro­furan-κO)lithium(I)]-bis­(μ-trimethyl­silanolato-κ2O:O)-gallium(III)-bis­(μ-trimethyl­silanolato-κ2O:O)-[(tetra­hydro­furan-κO)lithium(I)]-μ-bromido]

Grubba, R.; Baranowska, K.; Pikies, J.

doi:10.1107/S1600536810035518

Volume 66
Part 10
Page m1242
October 2010

Received 26 August 2010
Accepted 3 September 2010
Online 11 September 2010

Key indicators
Single-crystal X-ray study
T = 150 K
Mean (O-Li) = 0.006 Å
Disorder in main residue
R = 0.031
wR = 0.084
Data-to-parameter ratio = 15.6
Details

catena-Poly[[(tetrahydrofuran-O)lithium(I)]-bis(-trimethylsilanolato-²O:O)-gallium(III)-bis(-trimethylsilanolato-²O:O)-[(tetrahydrofuran-O)lithium(I)]--bromido]

Rafal Grubba,^a Katarzyna Baranowska ^a ^* and Jerzy Pikies ^a

^aDepartment of Inorganic Chemistry, Faculty of Chemistry, Gdansk University of Technology, 11/12 G. Narutowicz St., 80233 - PL Gdansk, Poland
Correspondence e-mail: katarzyna.baranowska@pg.gda.pl

The title chain polymer compound, [GaLi₂Br(C₃H₉OSi)₄(C₄H₈O)₂]_n, was obtained in the reaction of GaBr₃ with Me₃SiOLi in toluene/tetrahydrofuran. The Ga^III atom, located on a twofold rotation axis, is coordinated by four trimethylsilanolate ligands and has a distorted tetrahedral geometry. The Li^I atom is four coordinated by one bridging Br atom located on an inversion centre, two trimethylsilanolate ligands and one tetrahydrofurane molecule in a distorted tetrahedral geometry. The polymeric chains extend along [001]. The tetrahydrofurane molecule is disordered over two positions with site-occupancy factors of 0.57 (2) and 0.43 (2).

Related literature

For the structures of similar compounds, see: Wheatley (1963); Barry & Richeson (1994); Chisholm et al. (2001). For the properties of GaBr, see: Dohmeier et al. (1996).

Experimental

Crystal data

[GaLi₂Br(C₃H₉OSi)₄(C₄H₈O)₂]
M_r = 664.49
Monoclinic, C 2/c
a = 25.802 (8) Å
b = 9.761 (2) Å
c = 18.689 (6) Å
= 130.81 (2)°
V = 3563 (2) Å³
Z = 4
Mo K radiation
= 2.06 mm^-1
T = 150 K
0.2 × 0.18 × 0.09 mm

Data collection

Stoe Stadi IPDS 2 diffractometer
Absorption correction: numerical (X-RED32; Stoe & Cie, 2008) T_min = 0.503, T_max = 0.734
19442 measured reflections
3098 independent reflections
2926 reflections with I > 2(I)
R_int = 0.080

Refinement

R[F² > 2(F²)] = 0.031
wR(F²) = 0.084
S = 1.05
3098 reflections
199 parameters
H-atom parameters constrained
_max = 0.44 e Å^-3
_min = -0.60 e Å^-3

Data collection: IPDS (Stoe & Cie, 2008); cell refinement: IPDS; data reduction: X-RED32 (Stoe & Cie, 2008); 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); software used to prepare material for publication: WinGX (Farrugia, 1999).

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: IS2596 ).

References

Barry, S. T. & Richeson, D. S. (1994). Chem. Mater. 6, 2220-2221.
Chisholm, M. H., Navarro-Llobet, D. & Gallucci, J. (2001). Inorg. Chem. 40, 6506-6508.
Dohmeier, C., Loos, D. & Schnöckel, H. (1996). Angew. Chem. Int. Ed. Engl. 35, 129-149.
Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565.
Farrugia, L. J. (1999). J. Appl. Cryst. 32, 837-838.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Stoe & Cie (2008). IPDS and X-RED32. Stoe & Cie, Darmstadt, Germany.
Wheatley, P. J. (1963). J. Chem. Soc. pp. 3200-3203.

metal-organic compounds

catena-Poly[[(tetrahydrofuran-O)lithium(I)]-bis(-trimethylsilanolato-2O:O)-gallium(III)-bis(-trimethylsilanolato-2O:O)-[(tetrahydrofuran-O)lithium(I)]--bromido]