Dichlorido(4,4 0 -di-tert-butyl-2,2 0 -bi- pyridine-j 2 N,N 0 )gold(III) tetrachlorido- aurate(III) acetonitrile solvate Sema O ¨ ztu ¨rk Yıldırım, a Mehmet Akkurt, a * Nasser Safari, b Vahid Amani, b Vickie McKee, c Anita Abedi d and Hamid Reza Khavasi b a Department of Physics, Faculty of Arts and Sciences, Erciyes University, 38039 Kayseri, Turkey, b Chemistry Department, Shahid Beheshti University, Evin, Tehran 1983963113, Iran, c Department of Chemistry, Loughborough University, Leicester- shire LE11 3TU, England, and d Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Iran Correspondence e-mail: akkurt@erciyes.edu.tr Received 7 August 2008; accepted 8 August 2008 Key indicators: single-crystal X-ray study; T = 150 K; mean (C–C) = 0.009 A ˚ ; R factor = 0.036; wR factor = 0.079; data-to-parameter ratio = 25.1. In the title compound, [AuCl 2 (C 9 H 12 N) 2 ][AuCl 4 ]C 2 H 3 N, there is a mirror plane passing through Au and the central C—C bond of the bipyridyl ligand in the cation, and through Au and two Cl atoms of the anion. A cis-AuCl 2 N 2 square- planar geometry for the cation and a square-planar AuCl 4 geometry for the anion result. The two C atoms and the N atom of the acetonitrile molecule all have m site symmetries. In the crystal structure, weak C—HCl interactions may help to establish the packing. Related literature For related structures, see: Abbate et al. (2000); Adams & Stra ¨ hle (1982); Bjernemose et al. (2004); Hayoun et al. (2006); McInnes et al. (1995). Experimental Crystal data [AuCl 2 (C 9 H 12 N) 2 ][AuCl 4 ]C 2 H 3 N M r = 916.09 Monoclinic, P2 1 =m a = 6.7880 (9) A ˚ b = 14.2270 (19) A ˚ c = 14.1330 (19) A ˚ = 97.151 (2) V = 1354.3 (3) A ˚ 3 Z =2 Mo K radiation = 11.43 mm 1 T = 150 (2) K 0.14 0.10 0.01 mm Data collection Bruker APEXII CCD diffractometer Absorption correction: multi-scan (SADABS; Sheldrick, 2003) T min = 0.298, T max = 0.894 14949 measured reflections 3888 independent reflections 2860 reflections with I >2(I) R int = 0.060 Refinement R[F 2 >2(F 2 )] = 0.036 wR(F 2 ) = 0.079 S = 1.01 3888 reflections 155 parameters H-atom parameters constrained Á max = 1.59 e A ˚ 3 Á min = 1.24 e A ˚ 3 Table 1 Selected geometric parameters (A ˚ , ). Au1—Cl1 2.2590 (17) Au1—N1 2.020 (4) Au2—Cl2 2.271 (2) Au2—Cl3 2.2675 (16) Au2—Cl4 2.311 (2) N2—C11—C10 179.5 (14) Table 2 Hydrogen-bond geometry (A ˚ , ). D—HA D—H HA DA D—HA C3—H3Cl3 i 0.93 2.66 3.561 (6) 162 C3—H3Cl1 ii 0.93 2.64 3.231 (6) 122 Symmetry codes: (i) x þ 1; y þ 1; z; (ii) x; y þ 1 2 ; z. Data collection: APEX2 (Bruker, 2005); cell refinement: APEX2; data reduction: SAINT (Bruker, 2005); program(s) used to solve structure: SIR92 (Altomare et al. , 1993); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999). We are grateful to Shahid Beheshti University and Islamic Azad University, North Tehran Branch, for financial support. Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HB2776). References Abbate, F., Orioli, P., Bruni, B., Marcon, G. & Messori, L. (2000). Inorg. Chim. Acta, 311, 1–5. Adams, H. N. & Stra ¨hle, J. (1982). Z. Anorg. Allg. Chem. 485, 65–80. Altomare, A., Cascarano, G., Giacovazzo, C. & Guagliardi, A. (1993). J. Appl. Cryst. 26, 343–350. Bjernemose, J. K., Raithby, P. R. & Toftlund, H. (2004). Acta Cryst. E60, m1719–m1721. metal-organic compounds Acta Cryst. (2008). E64, m1189–m1190 doi:10.1107/S1600536808025646 Yıldırım et al. m1189 Acta Crystallographica Section E Structure Reports Online ISSN 1600-5368