cis-Dibromidobis(2-phenyl­pyridine-κN)platinum(II)

Ha, K.

doi:10.1107/S160053681203471X

metal-organic compounds

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ISSN: 2056-9890

Volume 68| Part 9| September 2012| Page m1169

doi:10.1107/S160053681203471X

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cis-Dibromidobis(2-phenylpyridine-κN)platinum(II)

Kwang Ha ^a ^*

^aSchool of Applied Chemical Engineering, The Research Institute of Catalysis, Chonnam National University, Gwangju 500-757, Republic of Korea
^*Correspondence e-mail: hakwang@chonnam.ac.kr

(Received 28 July 2012; accepted 5 August 2012; online 11 August 2012)

In the title complex, [PtBr₂(C₁₁H₉N)₂], the Pt^II ion has a distorted cis-Br₂N₂ square-planar coordination geometry defined by two N atoms from two 2-phenylpyridine (ppy) ligands and two Br⁻ anions. The ppy ligands are not planar, the dihedral angles between the pyridine and benzene rings being 49.0 (3) and 47.3 (3)°. In the crystal, the complex molecules are stacked in columns along the a axis. In the columns, there are numerous intra- and intermolecular π–π interactions between the six-membered rings, the shortest ring centroid–centroid distance being 3.774 (6) Å.

Related literature

For the crystal structures of the related Pt^II and Pd^II complexes, cis-[PtCl₂(ppy)₂] and trans-[PdX₂(ppy)₂] (X = Cl or I), see: Yoshinari et al. (2010 ); Ha (2011 , 2012 ).

Experimental

Crystal data

[PtBr₂(C₁₁H₉N)₂]
M_r = 665.29
Monoclinic, C c
a = 7.6268 (9) Å
b = 18.277 (2) Å
c = 15.1626 (18) Å
β = 96.948 (2)°
V = 2098.1 (4) Å³
Z = 4
Mo Kα radiation
μ = 10.51 mm⁻¹
T = 200 K
0.24 × 0.20 × 0.14 mm

Data collection

Bruker SMART 1000 CCD diffractometer
Absorption correction: multi-scan (SADABS; Bruker, 2000 ) T_min = 0.729, T_max = 1.000
6126 measured reflections
2931 independent reflections
2645 reflections with I > 2σ(I)
R_int = 0.029

Refinement

R[F² > 2σ(F²)] = 0.028
wR(F²) = 0.068
S = 1.04
2931 reflections
244 parameters
2 restraints
H-atom parameters constrained
Δρ_max = 1.73 e Å⁻³
Δρ_min = −0.93 e Å⁻³
Absolute structure: Flack (1983 ), 856 Friedel pairs
Flack parameter: −0.037 (13)

Table 1
Selected bond lengths (Å)

Pt1—N1	2.075 (8)
Pt1—N2	2.074 (10)
Pt1—Br1	2.4216 (11)
Pt1—Br2	2.4258 (15)

Data collection: SMART (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); 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 ) and PLATON (Spek, 2009 ); software used to prepare material for publication: SHELXL97.

Supporting information

Crystal structure: contains datablock global. DOI: 10.1107/S160053681203471X/xu5600sup1.cif

checkCIF report

Comment top

Crystal structures of the related Pt^II and Pd^II complexes, such as cis-[PtCl₂(ppy)₂] (ppy = 2-phenylpyridine, C₁₁H₉N) (Yoshinari et al., 2010) and trans-[PdX₂(ppy)₂] (X = Cl or I) (Ha, 2011; Ha, 2012), have been investigated previously.

The Pt^II ion in the title complex, [PtBr₂(ppy)₂], has a distorted cis-Br₂N₂ square-planar coordination geometry defined by two N atoms from two ppy ligands and two Br^- anions (Fig. 1). The Pt—N and Pt—Br bond lengths are nearly equivalent, respectively (Table 1). In the crystal, the two pyridine rings are inclined to the least-squares plane of the PtBr₂N₂ unit [maximum deviation = 0.092 (4) Å], making dihedral angles of 61.6 (2)° and 64.0 (2)°. The ppy ligands are not planar, the dihedral angles between the pyridine and benzene rings being 49.0 (3)° and 47.3 (3)°. The complex molecules are stacked in columns along the a axis. In the columns, numerous intra- and intermolecular π-π interactions between the six-membered rings are present, the shortest ring centroid-centroid distance being 3.774 (6) Å (Fig. 2).

Related literature top

For the crystal structures of the related Pt^II and Pd^II complexes, cis-[PtCl₂(ppy)₂] and trans-[PdX₂(ppy)₂] (X = Cl or I), see: Yoshinari et al. (2010); Ha (2011, 2012).

Experimental top

To a solution of K₂PtBr₄ (0.2391 g, 0.403 mmol) in H₂O (20 ml)/MeOH (100 ml) was added 2-phenylpyridine (0.1810 g, 1.166 mmol) and stirred for 7 h at room temperature. The formed brown precipitate was removed by filtration and the solvent of the filtrate was evaporated. The residue was washed with H₂O and dried at 323 K, to give a yellow powder (0.1672 g). Crystals suitable for X-ray analysis were obtained by slow evaporation from a CH₃CN solution at room temperature.

Computing details top

Data collection: SMART (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); data reduction: SAINT (Bruker, 2000); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures top

Fig. 1. A view of the molecular structure of the title complex, with displacement ellipsoids drawn at the 40% probability level and the atom numbering.

Fig. 2. A view of the unit-cell contents of the title complex.

cis-Dibromidobis(2-phenylpyridine-κN)platinum(II) top

Crystal data top

[PtBr₂(C₁₁H₉N)₂]	F(000) = 1248
M_r = 665.29	D_x = 2.106 Mg m⁻³
Monoclinic, Cc	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: C -2yc	Cell parameters from 4325 reflections
a = 7.6268 (9) Å	θ = 2.2–26.0°
b = 18.277 (2) Å	µ = 10.51 mm⁻¹
c = 15.1626 (18) Å	T = 200 K
β = 96.948 (2)°	Stick, yellow
V = 2098.1 (4) Å³	0.24 × 0.20 × 0.14 mm
Z = 4

Data collection top

Bruker SMART 1000 CCD diffractometer	2931 independent reflections
Radiation source: fine-focus sealed tube	2645 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.029
ϕ and ω scans	θ_max = 26.0°, θ_min = 2.6°
Absorption correction: multi-scan (SADABS; Bruker, 2000)	h = −9→8
T_min = 0.729, T_max = 1.000	k = −22→22
6126 measured reflections	l = −18→17

Refinement top

Refinement on F²	Secondary atom site location: difference Fourier map
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F² > 2σ(F²)] = 0.028	H-atom parameters constrained
wR(F²) = 0.068	w = 1/[σ²(F_o²) + (0.0286P)²] where P = (F_o² + 2F_c²)/3
S = 1.04	(Δ/σ)_max = 0.001
2931 reflections	Δρ_max = 1.73 e Å⁻³
244 parameters	Δρ_min = −0.93 e Å⁻³
2 restraints	Absolute structure: Flack (1983), 856 Friedel pairs
Primary atom site location: structure-invariant direct methods	Absolute structure parameter: −0.037 (13)

Crystal data top

[PtBr₂(C₁₁H₉N)₂]	V = 2098.1 (4) Å³
M_r = 665.29	Z = 4
Monoclinic, Cc	Mo Kα radiation
a = 7.6268 (9) Å	µ = 10.51 mm⁻¹
b = 18.277 (2) Å	T = 200 K
c = 15.1626 (18) Å	0.24 × 0.20 × 0.14 mm
β = 96.948 (2)°

Data collection top

Bruker SMART 1000 CCD diffractometer	2931 independent reflections
Absorption correction: multi-scan (SADABS; Bruker, 2000)	2645 reflections with I > 2σ(I)
T_min = 0.729, T_max = 1.000	R_int = 0.029
6126 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.028	H-atom parameters constrained
wR(F²) = 0.068	Δρ_max = 1.73 e Å⁻³
S = 1.04	Δρ_min = −0.93 e Å⁻³
2931 reflections	Absolute structure: Flack (1983), 856 Friedel pairs
244 parameters	Absolute structure parameter: −0.037 (13)
2 restraints

Special details top

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) top

	x	y	z	U_iso*/U_eq
Pt1	0.39565 (2)	0.136006 (14)	0.162689 (18)	0.02282 (10)
Br1	0.19970 (16)	0.03626 (5)	0.11234 (8)	0.0369 (3)
Br2	0.5217 (2)	0.14016 (7)	0.02336 (11)	0.0415 (4)
N1	0.5395 (11)	0.2278 (4)	0.2077 (6)	0.030 (2)
N2	0.2978 (14)	0.1281 (4)	0.2842 (7)	0.021 (2)
C1	0.4929 (14)	0.2895 (5)	0.1628 (8)	0.035 (3)
H1	0.4181	0.2865	0.1081	0.042*
C2	0.5505 (16)	0.3567 (5)	0.1939 (10)	0.042 (3)
H2	0.5197	0.3997	0.1605	0.051*
C3	0.6514 (16)	0.3604 (5)	0.2727 (10)	0.044 (3)
H3	0.6870	0.4068	0.2970	0.052*
C4	0.7031 (14)	0.2986 (5)	0.3180 (8)	0.040 (3)
H4	0.7776	0.3013	0.3728	0.048*
C5	0.6453 (13)	0.2306 (5)	0.2829 (7)	0.029 (2)
C6	0.7103 (13)	0.1613 (5)	0.3294 (7)	0.029 (2)
C7	0.7024 (15)	0.1529 (7)	0.4178 (8)	0.043 (3)
H7	0.6555	0.1912	0.4503	0.052*
C8	0.7627 (16)	0.0885 (7)	0.4618 (9)	0.052 (3)
H8	0.7560	0.0824	0.5235	0.063*
C9	0.8311 (17)	0.0349 (7)	0.4137 (10)	0.056 (4)
H9	0.8734	−0.0087	0.4429	0.067*
C10	0.8406 (15)	0.0420 (6)	0.3247 (9)	0.046 (3)
H10	0.8896	0.0036	0.2931	0.055*
C11	0.7788 (14)	0.1051 (5)	0.2802 (8)	0.036 (3)
H11	0.7827	0.1102	0.2181	0.043*
C12	0.3481 (13)	0.0673 (4)	0.3308 (7)	0.027 (2)
H12	0.4130	0.0310	0.3039	0.032*
C13	0.3097 (13)	0.0563 (5)	0.4142 (7)	0.029 (2)
H13	0.3388	0.0115	0.4441	0.035*
C14	0.2264 (13)	0.1122 (5)	0.4554 (7)	0.033 (2)
H14	0.2045	0.1079	0.5156	0.040*
C15	0.1768 (13)	0.1735 (6)	0.4071 (7)	0.031 (2)
H15	0.1160	0.2115	0.4335	0.037*
C16	0.2145 (12)	0.1813 (5)	0.3183 (6)	0.023 (2)
C17	0.1496 (12)	0.2463 (4)	0.2664 (7)	0.024 (2)
C18	0.1739 (13)	0.3160 (5)	0.3025 (8)	0.035 (3)
H18	0.2335	0.3229	0.3606	0.042*
C19	0.1086 (17)	0.3755 (6)	0.2510 (11)	0.052 (4)
H19	0.1232	0.4236	0.2745	0.062*
C20	0.0250 (16)	0.3656 (6)	0.1683 (10)	0.046 (3)
H20	−0.0162	0.4068	0.1337	0.055*
C21	−0.0010 (15)	0.2976 (6)	0.1341 (8)	0.045 (3)
H21	−0.0622	0.2914	0.0762	0.054*
C22	0.0612 (12)	0.2370 (5)	0.1830 (7)	0.028 (2)
H22	0.0426	0.1892	0.1589	0.033*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Pt1	0.02761 (18)	0.01791 (14)	0.02340 (18)	−0.0005 (2)	0.00489 (12)	0.0005 (2)
Br1	0.0466 (7)	0.0262 (5)	0.0378 (6)	−0.0076 (5)	0.0053 (5)	−0.0108 (5)
Br2	0.0546 (10)	0.0435 (8)	0.0291 (8)	−0.0010 (6)	0.0162 (7)	0.0022 (6)
N1	0.032 (5)	0.026 (4)	0.035 (5)	−0.008 (4)	0.012 (4)	−0.002 (4)
N2	0.018 (5)	0.022 (4)	0.021 (6)	−0.005 (3)	−0.003 (4)	0.006 (4)
C1	0.040 (6)	0.019 (4)	0.048 (7)	0.001 (4)	0.009 (5)	0.008 (5)
C2	0.044 (7)	0.024 (5)	0.062 (9)	−0.010 (5)	0.019 (7)	0.001 (5)
C3	0.039 (7)	0.020 (5)	0.075 (10)	−0.013 (5)	0.020 (7)	−0.010 (6)
C4	0.038 (7)	0.035 (6)	0.047 (7)	−0.006 (5)	0.008 (5)	−0.009 (5)
C5	0.024 (5)	0.031 (5)	0.033 (6)	−0.008 (4)	0.005 (4)	−0.005 (5)
C6	0.027 (6)	0.025 (4)	0.033 (6)	−0.006 (4)	0.003 (4)	0.003 (4)
C7	0.026 (6)	0.067 (8)	0.034 (7)	−0.008 (6)	−0.003 (5)	−0.011 (6)
C8	0.046 (7)	0.067 (8)	0.042 (7)	−0.020 (7)	−0.002 (6)	0.008 (7)
C9	0.046 (8)	0.046 (7)	0.071 (10)	−0.009 (6)	−0.011 (7)	0.026 (7)
C10	0.040 (7)	0.032 (6)	0.061 (9)	−0.007 (5)	−0.012 (6)	−0.002 (6)
C11	0.040 (6)	0.028 (5)	0.039 (7)	−0.001 (5)	0.002 (5)	0.008 (5)
C12	0.032 (5)	0.017 (4)	0.031 (6)	−0.004 (4)	0.000 (4)	0.001 (4)
C13	0.029 (6)	0.025 (5)	0.033 (6)	−0.005 (4)	0.001 (5)	0.007 (4)
C14	0.033 (6)	0.041 (5)	0.026 (6)	−0.006 (5)	0.005 (5)	0.013 (5)
C15	0.027 (6)	0.037 (5)	0.029 (6)	−0.007 (4)	0.010 (4)	−0.007 (5)
C16	0.022 (5)	0.018 (4)	0.027 (5)	−0.004 (4)	0.001 (4)	0.004 (4)
C17	0.026 (5)	0.014 (4)	0.034 (6)	0.000 (4)	0.013 (4)	0.002 (4)
C18	0.026 (5)	0.026 (5)	0.053 (7)	−0.002 (4)	0.005 (5)	−0.002 (5)
C19	0.039 (7)	0.026 (5)	0.095 (12)	−0.005 (5)	0.026 (8)	−0.006 (7)
C20	0.038 (7)	0.027 (6)	0.076 (10)	0.003 (5)	0.018 (7)	0.021 (6)
C21	0.049 (7)	0.044 (7)	0.044 (7)	0.023 (6)	0.012 (6)	0.013 (6)
C22	0.024 (5)	0.029 (5)	0.030 (6)	0.002 (4)	0.005 (4)	0.001 (4)

Geometric parameters (Å, º) top

Pt1—N1	2.075 (8)	C9—H9	0.9500
Pt1—N2	2.074 (10)	C10—C11	1.390 (14)
Pt1—Br1	2.4216 (11)	C10—H10	0.9500
Pt1—Br2	2.4258 (15)	C11—H11	0.9500
N1—C5	1.316 (13)	C12—C13	1.347 (14)
N1—C1	1.343 (12)	C12—H12	0.9500
N2—C16	1.303 (12)	C13—C14	1.391 (14)
N2—C12	1.346 (12)	C13—H13	0.9500
C1—C2	1.368 (14)	C14—C15	1.366 (14)
C1—H1	0.9500	C14—H14	0.9500
C2—C3	1.343 (19)	C15—C16	1.418 (13)
C2—H2	0.9500	C15—H15	0.9500
C3—C4	1.356 (16)	C16—C17	1.477 (12)
C3—H3	0.9500	C17—C22	1.370 (14)
C4—C5	1.400 (13)	C17—C18	1.389 (13)
C4—H4	0.9500	C18—C19	1.396 (17)
C5—C6	1.505 (13)	C18—H18	0.9500
C6—C7	1.358 (16)	C19—C20	1.348 (19)
C6—C11	1.406 (14)	C19—H19	0.9500
C7—C8	1.402 (17)	C20—C21	1.351 (16)
C7—H7	0.9500	C20—H20	0.9500
C8—C9	1.363 (17)	C21—C22	1.385 (13)
C8—H8	0.9500	C21—H21	0.9500
C9—C10	1.366 (18)	C22—H22	0.9500

N2—Pt1—N1	89.8 (3)	C9—C10—C11	120.1 (12)
N2—Pt1—Br1	87.3 (3)	C9—C10—H10	119.9
N1—Pt1—Br1	173.9 (2)	C11—C10—H10	119.9
N2—Pt1—Br2	176.9 (3)	C10—C11—C6	118.4 (10)
N1—Pt1—Br2	90.7 (2)	C10—C11—H11	120.8
Br1—Pt1—Br2	92.50 (5)	C6—C11—H11	120.8
C5—N1—C1	120.2 (9)	N2—C12—C13	122.4 (10)
C5—N1—Pt1	124.1 (7)	N2—C12—H12	118.8
C1—N1—Pt1	114.5 (7)	C13—C12—H12	118.8
C16—N2—C12	121.9 (10)	C12—C13—C14	118.4 (9)
C16—N2—Pt1	123.1 (7)	C12—C13—H13	120.8
C12—N2—Pt1	114.4 (7)	C14—C13—H13	120.8
N1—C1—C2	121.6 (12)	C15—C14—C13	118.2 (9)
N1—C1—H1	119.2	C15—C14—H14	120.9
C2—C1—H1	119.2	C13—C14—H14	120.9
C3—C2—C1	118.6 (11)	C14—C15—C16	121.1 (9)
C3—C2—H2	120.7	C14—C15—H15	119.4
C1—C2—H2	120.7	C16—C15—H15	119.4
C2—C3—C4	120.5 (10)	N2—C16—C15	117.8 (9)
C2—C3—H3	119.7	N2—C16—C17	122.5 (9)
C4—C3—H3	119.7	C15—C16—C17	119.5 (8)
C3—C4—C5	119.2 (11)	C22—C17—C18	120.3 (9)
C3—C4—H4	120.4	C22—C17—C16	119.1 (8)
C5—C4—H4	120.4	C18—C17—C16	120.5 (9)
N1—C5—C4	119.7 (10)	C17—C18—C19	118.2 (11)
N1—C5—C6	120.4 (9)	C17—C18—H18	120.9
C4—C5—C6	119.9 (9)	C19—C18—H18	120.9
C7—C6—C11	120.4 (10)	C20—C19—C18	120.8 (11)
C7—C6—C5	120.3 (9)	C20—C19—H19	119.6
C11—C6—C5	119.3 (9)	C18—C19—H19	119.6
C6—C7—C8	120.8 (11)	C19—C20—C21	120.7 (11)
C6—C7—H7	119.6	C19—C20—H20	119.6
C8—C7—H7	119.6	C21—C20—H20	119.6
C9—C8—C7	118.3 (12)	C20—C21—C22	120.4 (12)
C9—C8—H8	120.9	C20—C21—H21	119.8
C7—C8—H8	120.9	C22—C21—H21	119.8
C8—C9—C10	122.0 (12)	C17—C22—C21	119.5 (9)
C8—C9—H9	119.0	C17—C22—H22	120.3
C10—C9—H9	119.0	C21—C22—H22	120.3

N2—Pt1—N1—C5	51.4 (8)	C8—C9—C10—C11	−0.3 (19)
Br2—Pt1—N1—C5	−125.5 (7)	C9—C10—C11—C6	1.2 (16)
N2—Pt1—N1—C1	−116.7 (7)	C7—C6—C11—C10	−1.2 (15)
Br2—Pt1—N1—C1	66.4 (7)	C5—C6—C11—C10	179.0 (9)
N1—Pt1—N2—C16	55.9 (9)	C16—N2—C12—C13	2.7 (16)
Br1—Pt1—N2—C16	−118.6 (9)	Pt1—N2—C12—C13	174.1 (8)
N1—Pt1—N2—C12	−115.3 (8)	N2—C12—C13—C14	−4.8 (15)
Br1—Pt1—N2—C12	70.1 (8)	C12—C13—C14—C15	4.4 (15)
C5—N1—C1—C2	−1.1 (15)	C13—C14—C15—C16	−2.2 (14)
Pt1—N1—C1—C2	167.5 (8)	C12—N2—C16—C15	−0.2 (15)
N1—C1—C2—C3	−2.1 (16)	Pt1—N2—C16—C15	−170.9 (7)
C1—C2—C3—C4	3.6 (17)	C12—N2—C16—C17	−176.5 (9)
C2—C3—C4—C5	−2.0 (16)	Pt1—N2—C16—C17	12.9 (14)
C1—N1—C5—C4	2.7 (14)	C14—C15—C16—N2	0.1 (14)
Pt1—N1—C5—C4	−164.7 (7)	C14—C15—C16—C17	176.4 (9)
C1—N1—C5—C6	−174.7 (8)	N2—C16—C17—C22	45.9 (13)
Pt1—N1—C5—C6	17.9 (12)	C15—C16—C17—C22	−130.2 (9)
C3—C4—C5—N1	−1.2 (15)	N2—C16—C17—C18	−135.6 (10)
C3—C4—C5—C6	176.2 (9)	C15—C16—C17—C18	48.2 (13)
N1—C5—C6—C7	−132.2 (11)	C22—C17—C18—C19	−1.0 (14)
C4—C5—C6—C7	50.3 (13)	C16—C17—C18—C19	−179.4 (9)
N1—C5—C6—C11	47.6 (13)	C17—C18—C19—C20	−0.4 (16)
C4—C5—C6—C11	−129.9 (10)	C18—C19—C20—C21	1.5 (18)
C11—C6—C7—C8	0.2 (16)	C19—C20—C21—C22	−1.3 (17)
C5—C6—C7—C8	−180.0 (9)	C18—C17—C22—C21	1.2 (14)
C6—C7—C8—C9	0.7 (17)	C16—C17—C22—C21	179.7 (8)
C7—C8—C9—C10	−0.7 (18)	C20—C21—C22—C17	−0.1 (15)

Experimental details

Crystal data
Chemical formula	[PtBr₂(C₁₁H₉N)₂]
M_r	665.29
Crystal system, space group	Monoclinic, Cc
Temperature (K)	200
a, b, c (Å)	7.6268 (9), 18.277 (2), 15.1626 (18)
β (°)	96.948 (2)
V (Å³)	2098.1 (4)
Z	4
Radiation type	Mo Kα
µ (mm⁻¹)	10.51
Crystal size (mm)	0.24 × 0.20 × 0.14

Data collection
Diffractometer	Bruker SMART 1000 CCD diffractometer
Absorption correction	Multi-scan (SADABS; Bruker, 2000)
T_min, T_max	0.729, 1.000
No. of measured, independent and observed [I > 2σ(I)] reflections	6126, 2931, 2645
R_int	0.029
(sin θ/λ)_max (Å⁻¹)	0.618

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.028, 0.068, 1.04
No. of reflections	2931
No. of parameters	244
No. of restraints	2
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	1.73, −0.93
Absolute structure	Flack (1983), 856 Friedel pairs
Absolute structure parameter	−0.037 (13)

Computer programs: SMART (Bruker, 2000), SAINT (Bruker, 2000), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009).

Selected bond lengths (Å) top

Pt1—N1	2.075 (8)	Pt1—Br1	2.4216 (11)
Pt1—N2	2.074 (10)	Pt1—Br2	2.4258 (15)

Acknowledgements

This work was supported by the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011–0030747).

References

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