Bromido(2,2':6',2''-terpyridine)platinum(II) dibromidoaurate(I) dimethyl sulfoxide solvate.

The crystal structure of the title compound, [PtBr(C(15)H(11)N(3))][AuBr(2)]·(CH(3))(2)SO, exhibits infinite chains of {PtAuPt}(∞) metallophilic inter-actions along the b axis. Two cations and one anion stack in a trimer with a unique Pt⋯Au distance of 3.3361 (5) Å and Pt⋯Pt contacts of 3.4335 (6) Å. The remaining [AuBr(2)](-) anion forms no close contacts.

Related literature

For the related chloride structure, [Pt(tpy)Cl][AuCl2] (tpy=2,2′:6′,2"-terpyridine), see Hayoun et al. (2006 ▶). For the related [Pt(tpy)I][AuI2] complex, see Angle et al. (2007 ▶). For a review of double salts with metallophilic inter­actions, see Doerrer (2008 ▶). The synthesis of [Pt(tpy)X]X complexes (X = Cl, Br, I) is discussed in Annibale et al. (2004 ▶), and the preparation of [AuX 2]− in Braunstein & Clark (1973 ▶). For background to metallophilic inter­actions, see: Pyykkö (1997 ▶). For a description of the Cambridge Structural Database, see: Allen (2002 ▶).

Experimental

Crystal data

[PtBr(C15H11N3)][AuBr2]·C2H6OS

M = 943.18

Triclinic,

a = 8.1463 (11) Å

b = 10.0930 (14) Å

c = 13.9624 (19) Å

α = 81.905 (2)°

β = 87.675 (2)°

γ = 68.532 (3)°

V = 1057.6 (3) Å3

Z = 2

Mo Kα radiation

μ = 19.31 mm−1

T = 208 K

0.30 × 0.20 × 0.15 mm

Data collection

Bruker SMART CCD area-detector diffractometer

Absorption correction: multi-scan (SADABS; Sheldrick, 2000 ▶) T min = 0.068, T max = 0.160

7511 measured reflections

4826 independent reflections

4312 reflections with I > 2σ(I)

R int = 0.019

Refinement

R[F 2 > 2σ(F 2)] = 0.039

wR(F 2) = 0.103

S = 1.01

4826 reflections

249 parameters

H-atom parameters constrained

Δρmax = 2.01 e Å−3

Δρmin = −4.14 e Å−3

Data collection: SMART (Bruker, 2005 ▶); cell refinement: 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 (Farrugia, 1997 ▶); software used to prepare material for publication: SHELXTL (Sheldrick, 2008 ▶).

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536809033248/cv2602sup1.cif

Structure factors: contains datablocks I. DOI: 10.1107/S1600536809033248/cv2602Isup2.hkl

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

[PtBr(C15H11N3)][AuBr2]·C2H6OS	Z = 2
Mr = 943.18	F(000) = 852
Triclinic, P1	Dx = 2.962 Mg m−3
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 8.1463 (11) Å	Cell parameters from 5521 reflections
b = 10.0930 (14) Å	θ = 2.5–28.2°
c = 13.9624 (19) Å	µ = 19.31 mm−1
α = 81.905 (2)°	T = 208 K
β = 87.675 (2)°	Block, red
γ = 68.532 (3)°	0.30 × 0.20 × 0.15 mm
V = 1057.6 (3) Å3

Bruker SMART CCD area-detector diffractometer	4826 independent reflections
Radiation source: fine-focus sealed tube	4312 reflections with I > 2σ(I)
graphite	Rint = 0.019
φ and ω scans	θmax = 28.2°, θmin = 1.5°
Absorption correction: multi-scan (SADABS; Sheldrick, 2000)	h = −8→10
Tmin = 0.068, Tmax = 0.160	k = −13→10
7511 measured reflections	l = −18→17

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)] = 0.039	Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.103	H-atom parameters constrained
S = 1.01	w = 1/[σ2(Fo2) + (0.0756P)2] P = (Fo2 + 2Fc2)/3
4826 reflections	(Δ/σ)max = 0.001
249 parameters	Δρmax = 2.01 e Å−3
0 restraints	Δρmin = −4.13 e Å−3

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 F^2^ against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F^2^, conventional R-factors R are based on F, with F set to zero for negative F^2^. The threshold expression of F^2^ > σ(F^2^) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F^2^ 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
Au1	1.0000	0.5000	1.0000	0.03631 (12)
Au2	0.5000	0.5000	0.5000	0.03754 (12)
Pt1	0.01155 (3)	0.82805 (2)	−0.005856 (15)	0.02023 (9)
Br1	−0.25578 (8)	0.87221 (7)	0.08893 (5)	0.03042 (15)
Br2	0.98737 (9)	0.44194 (7)	1.17203 (6)	0.03918 (18)
Br3	0.75978 (12)	0.32173 (10)	0.45033 (6)	0.0514 (2)
S1	0.3410 (3)	1.1786 (2)	0.55776 (14)	0.0477 (5)
N1	0.1935 (6)	0.7291 (5)	0.1004 (4)	0.0220 (10)
N3	−0.0990 (6)	0.9177 (5)	−0.1372 (4)	0.0212 (9)
N2	0.2244 (6)	0.7937 (5)	−0.0823 (4)	0.0196 (9)
O1	0.3110 (10)	1.0395 (7)	0.5756 (6)	0.079 (2)
C1	0.1657 (9)	0.6989 (7)	0.1947 (5)	0.0292 (13)
H1A	0.0493	0.7257	0.2172	0.035*
C2	0.3038 (10)	0.6292 (8)	0.2598 (5)	0.0363 (15)
H2A	0.2809	0.6086	0.3256	0.044*
C3	0.4751 (10)	0.5900 (8)	0.2277 (5)	0.0356 (15)
H3A	0.5700	0.5420	0.2713	0.043*
C4	0.5057 (9)	0.6221 (7)	0.1305 (5)	0.0313 (14)
H4A	0.6216	0.5976	0.1072	0.038*
C5	0.3634 (8)	0.6908 (6)	0.0682 (4)	0.0239 (12)
C6	0.3808 (8)	0.7276 (7)	−0.0365 (5)	0.0275 (13)
C7	0.5327 (8)	0.7028 (6)	−0.0895 (5)	0.0274 (13)
H7A	0.6440	0.6568	−0.0592	0.033*
C8	0.5184 (8)	0.7467 (7)	−0.1880 (5)	0.0307 (14)
H8A	0.6215	0.7295	−0.2249	0.037*
C9	0.3560 (8)	0.8153 (7)	−0.2337 (4)	0.0270 (12)
H9A	0.3475	0.8453	−0.3008	0.032*
C10	0.2060 (8)	0.8385 (6)	−0.1780 (4)	0.0237 (12)
C11	0.0209 (8)	0.9105 (6)	−0.2094 (4)	0.0241 (12)
C12	−0.0334 (9)	0.9673 (7)	−0.3032 (5)	0.0306 (14)
H12A	0.0508	0.9637	−0.3519	0.037*
C13	−0.2089 (9)	1.0288 (7)	−0.3261 (5)	0.0344 (15)
H13A	−0.2470	1.0662	−0.3903	0.041*
C14	−0.3288 (9)	1.0348 (8)	−0.2530 (5)	0.0356 (15)
H14A	−0.4502	1.0775	−0.2672	0.043*
C15	−0.2725 (8)	0.9788 (6)	−0.1592 (5)	0.0270 (13)
H15A	−0.3559	0.9833	−0.1100	0.032*
C16	0.2828 (11)	1.2500 (9)	0.4364 (5)	0.0473 (19)
H16A	0.3572	1.1838	0.3945	0.071*
H16B	0.2987	1.3414	0.4222	0.071*
H16C	0.1603	1.2642	0.4255	0.071*
C17	0.1620 (13)	1.3074 (11)	0.6114 (7)	0.063 (3)
H17A	0.1799	1.2924	0.6809	0.094*
H17B	0.0525	1.2965	0.5969	0.094*
H17C	0.1560	1.4035	0.5856	0.094*

	U11	U22	U33	U12	U13	U23
Au1	0.02295 (18)	0.0324 (2)	0.0533 (3)	−0.00747 (15)	−0.00103 (16)	−0.01197 (17)
Au2	0.0434 (2)	0.0484 (2)	0.0243 (2)	−0.02176 (18)	−0.00643 (16)	0.00001 (16)
Pt1	0.01865 (13)	0.02448 (13)	0.01805 (14)	−0.00871 (9)	0.00074 (9)	−0.00222 (9)
Br1	0.0254 (3)	0.0345 (3)	0.0311 (3)	−0.0109 (3)	0.0069 (2)	−0.0054 (3)
Br2	0.0306 (3)	0.0323 (3)	0.0542 (5)	−0.0095 (3)	−0.0011 (3)	−0.0097 (3)
Br3	0.0499 (5)	0.0579 (5)	0.0436 (5)	−0.0160 (4)	−0.0025 (4)	−0.0072 (4)
S1	0.0383 (9)	0.0678 (13)	0.0308 (10)	−0.0188 (9)	−0.0043 (8)	0.0137 (9)
N1	0.021 (2)	0.027 (2)	0.019 (2)	−0.0096 (19)	−0.0004 (19)	−0.0027 (19)
N3	0.017 (2)	0.022 (2)	0.022 (2)	−0.0041 (18)	−0.0033 (18)	−0.0013 (19)
N2	0.018 (2)	0.021 (2)	0.020 (2)	−0.0077 (18)	0.0020 (18)	−0.0030 (19)
O1	0.081 (5)	0.057 (4)	0.079 (5)	−0.020 (4)	0.013 (4)	0.033 (4)
C1	0.034 (3)	0.035 (3)	0.021 (3)	−0.017 (3)	0.003 (3)	−0.002 (3)
C2	0.042 (4)	0.045 (4)	0.023 (3)	−0.020 (3)	−0.001 (3)	0.005 (3)
C3	0.039 (4)	0.038 (4)	0.029 (4)	−0.015 (3)	−0.012 (3)	0.006 (3)
C4	0.030 (3)	0.034 (3)	0.032 (4)	−0.013 (3)	−0.004 (3)	−0.004 (3)
C5	0.023 (3)	0.025 (3)	0.024 (3)	−0.011 (2)	0.000 (2)	−0.001 (2)
C6	0.024 (3)	0.030 (3)	0.028 (3)	−0.010 (2)	−0.001 (2)	−0.003 (3)
C7	0.023 (3)	0.029 (3)	0.029 (3)	−0.008 (2)	−0.002 (2)	−0.004 (3)
C8	0.024 (3)	0.036 (3)	0.032 (4)	−0.011 (3)	0.007 (3)	−0.005 (3)
C9	0.027 (3)	0.035 (3)	0.020 (3)	−0.013 (3)	0.002 (2)	−0.002 (2)
C10	0.025 (3)	0.023 (3)	0.025 (3)	−0.010 (2)	0.001 (2)	−0.003 (2)
C11	0.022 (3)	0.026 (3)	0.025 (3)	−0.008 (2)	−0.001 (2)	−0.007 (2)
C12	0.036 (3)	0.029 (3)	0.026 (3)	−0.013 (3)	−0.003 (3)	0.001 (3)
C13	0.035 (3)	0.036 (3)	0.029 (4)	−0.010 (3)	−0.009 (3)	0.001 (3)
C14	0.027 (3)	0.042 (4)	0.035 (4)	−0.010 (3)	−0.010 (3)	0.002 (3)
C15	0.022 (3)	0.030 (3)	0.029 (3)	−0.009 (2)	−0.003 (2)	−0.003 (3)
C16	0.057 (5)	0.060 (5)	0.028 (4)	−0.025 (4)	0.001 (3)	−0.001 (3)
C17	0.070 (6)	0.084 (7)	0.049 (5)	−0.040 (5)	0.016 (5)	−0.025 (5)

Au1—Br2i	2.3981 (9)	C4—H4A	0.9400
Au1—Br2	2.3981 (9)	C5—C6	1.471 (9)
Au2—Br3	2.3753 (9)	C6—C7	1.375 (9)
Au2—Br3ii	2.3753 (9)	C7—C8	1.381 (9)
Pt1—N2	1.944 (5)	C7—H7A	0.9400
Pt1—N3	2.015 (5)	C8—C9	1.383 (9)
Pt1—N1	2.018 (5)	C8—H8A	0.9400
Pt1—Br1	2.4320 (7)	C9—C10	1.385 (8)
S1—O1	1.497 (7)	C9—H9A	0.9400
S1—C16	1.757 (8)	C10—C11	1.468 (8)
S1—C17	1.782 (9)	C11—C12	1.376 (9)
N1—C1	1.338 (8)	C12—C13	1.365 (9)
N1—C5	1.369 (7)	C12—H12A	0.9400
N3—C15	1.348 (7)	C13—C14	1.376 (10)
N3—C11	1.366 (8)	C13—H13A	0.9400
N2—C6	1.342 (7)	C14—C15	1.376 (9)
N2—C10	1.345 (8)	C14—H14A	0.9400
C1—C2	1.382 (10)	C15—H15A	0.9400
C1—H1A	0.9400	C16—H16A	0.9700
C2—C3	1.379 (10)	C16—H16B	0.9700
C2—H2A	0.9400	C16—H16C	0.9700
C3—C4	1.385 (9)	C17—H17A	0.9700
C3—H3A	0.9400	C17—H17B	0.9700
C4—C5	1.380 (9)	C17—H17C	0.9700
Br2i—Au1—Br2	180.0	C6—C7—H7A	120.7
Br3—Au2—Br3ii	180.000 (1)	C8—C7—H7A	120.7
N2—Pt1—N3	80.7 (2)	C7—C8—C9	121.5 (6)
N2—Pt1—N1	80.8 (2)	C7—C8—H8A	119.2
N3—Pt1—N1	161.5 (2)	C9—C8—H8A	119.2
N2—Pt1—Br1	179.63 (16)	C8—C9—C10	118.2 (6)
N3—Pt1—Br1	98.95 (14)	C8—C9—H9A	120.9
N1—Pt1—Br1	99.58 (14)	C10—C9—H9A	120.9
O1—S1—C16	107.0 (4)	N2—C10—C9	118.9 (5)
O1—S1—C17	106.8 (4)	N2—C10—C11	113.0 (5)
C16—S1—C17	97.3 (4)	C9—C10—C11	128.2 (6)
C1—N1—C5	118.9 (5)	N3—C11—C12	120.8 (6)
C1—N1—Pt1	127.8 (4)	N3—C11—C10	114.7 (5)
C5—N1—Pt1	113.3 (4)	C12—C11—C10	124.4 (6)
C15—N3—C11	119.1 (5)	C13—C12—C11	120.3 (7)
C15—N3—Pt1	127.2 (4)	C13—C12—H12A	119.8
C11—N3—Pt1	113.6 (4)	C11—C12—H12A	119.8
C6—N2—C10	123.9 (5)	C12—C13—C14	118.4 (6)
C6—N2—Pt1	118.2 (4)	C12—C13—H13A	120.8
C10—N2—Pt1	117.9 (4)	C14—C13—H13A	120.8
N1—C1—C2	121.7 (6)	C13—C14—C15	120.6 (6)
N1—C1—H1A	119.2	C13—C14—H14A	119.7
C2—C1—H1A	119.2	C15—C14—H14A	119.7
C3—C2—C1	119.7 (6)	N3—C15—C14	120.7 (6)
C3—C2—H2A	120.1	N3—C15—H15A	119.7
C1—C2—H2A	120.1	C14—C15—H15A	119.7
C2—C3—C4	119.2 (6)	S1—C16—H16A	109.5
C2—C3—H3A	120.4	S1—C16—H16B	109.5
C4—C3—H3A	120.4	H16A—C16—H16B	109.5
C5—C4—C3	118.9 (6)	S1—C16—H16C	109.5
C5—C4—H4A	120.5	H16A—C16—H16C	109.5
C3—C4—H4A	120.5	H16B—C16—H16C	109.5
N1—C5—C4	121.6 (6)	S1—C17—H17A	109.5
N1—C5—C6	115.0 (5)	S1—C17—H17B	109.5
C4—C5—C6	123.4 (6)	H17A—C17—H17B	109.5
N2—C6—C7	119.0 (6)	S1—C17—H17C	109.5
N2—C6—C5	112.7 (5)	H17A—C17—H17C	109.5
C7—C6—C5	128.3 (6)	H17B—C17—H17C	109.5
C6—C7—C8	118.6 (6)

	Cl	Br	I
Au—Pt	3.2684 (1)	3.3361 (5)	4.2546 (4)
Pt—X	2.305 (3)	2.4319 (8)	2.5930 (5)
Au—X	2.271 (3)	2.3984 (9)	2.5581 (5)
Pt—Pt	3.4535 (7)	3.4335 (6)	3.5278 (3)
	Cl	Br
X2—Au1—Pt1	88.63 (7)	81.70 (2)
	91.37 (7)	98.30 (2)
X1—Pt1—Au1	97.62 (7)	84.08 (2)
Au1—Pt1—Pt1(1-x, 2-y, -z)	165.10 (2)	173.94 (1)

Table 1

Selected geometric parameters (Å, °) in [Pt(tpy)X][AuX 2], X = Cl, Br, I

	Cl	Br	I
Au—Pt	3.2684 (1)	3.3361 (5)	4.2546 (4)
Pt—X	2.305 (3)	2.4319 (8)	2.5930 (5)
Au—X	2.271 (3)	2.3984 (9)	2.5581 (5)
Pt—Pt	3.4535 (7)	3.4335 (6)	3.5278 (3)
	Cl	Br
X2—Au1—Pt1	88.63 (7)	81.70 (2)
	91.37 (7)	98.30 (2)
X1—Pt1—Au1	97.62 (7)	84.08 (2)
Au1—Pt1—Pt1(1 − x, 2 − y, −z)	165.10 (2)	173.94 (1)