(2,2′-Bipyridine-κ2N,N′)tetra­bromidoplatinum(IV)

Ha, K.

doi:10.1107/S1600536810034793

Volume 66
Part 10
Page m1213
October 2010

Received 23 August 2010
Accepted 29 August 2010
Online 4 September 2010

Key indicators
Single-crystal X-ray study
T = 200 K
Mean (C-C) = 0.015 Å
R = 0.027
wR = 0.053
Data-to-parameter ratio = 14.7
Details

(2,2'-Bipyridine-²N,N')tetrabromidoplatinum(IV)

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

In the title complex, [PtBr₄(C₁₀H₈N₂)], the Pt^IV ion has a slightly distorted octahedral coordination defined by two N atoms of the chelating 2,2'-bipyridine ligand and four bromide ions. As a result of the different trans effects of the N and Br atoms, the Pt-Br bonds trans to the N atom are slightly shorter than those to mutually trans Br atoms. In the crystal structure, the molecules are arranged in a V-shaped packing pattern along the b axis and stacked in columns along the a axis. In the columns, several intermolecular [pi] - [pi] interactions between the pyridine rings are present. The shortest ring centroid-centroid distance is 3.921 (6) Å, with a dihedral angle of 1.6 (5)° between the ring planes. The complexes are connected by C-HBr hydrogen bonds, forming chains along the b axis.

Related literature

For the crystal structure of [PtCl₄(bipy)] (bipy = 2,2'-bipyridine), see: Hambley (1986).

Experimental

Crystal data

[PtBr₄(C₁₀H₈N₂)]
M_r = 670.91
Monoclinic, P n
a = 8.3146 (7) Å
b = 6.9010 (5) Å
c = 12.5873 (10) Å
= 102.940 (2)°
V = 703.91 (10) Å³
Z = 2
Mo K radiation
= 21.30 mm^-1
T = 200 K
0.25 × 0.12 × 0.08 mm

Data collection

Bruker SMART 1000 CCD diffractometer
Absorption correction: multi-scan (SADABS; Bruker, 2000) T_min = 0.462, T_max = 1.000
4282 measured reflections
2257 independent reflections
2128 reflections with I > 2(I)
R_int = 0.033

Refinement

R[F² > 2(F²)] = 0.027
wR(F²) = 0.053
S = 0.98
2257 reflections
154 parameters
2 restraints
H-atom parameters constrained
_max = 1.69 e Å^-3
_min = -1.66 e Å^-3
Absolute structure: Flack (1983), 714 Friedel pairs
Flack parameter: -0.004 (14)

Table 1
Selected bond lengths (Å)

Pt1-N2	2.046 (7)
Pt1-N1	2.048 (7)
Pt1-Br1	2.4412 (10)
Pt1-Br2	2.4442 (10)
Pt1-Br4	2.4595 (11)
Pt1-Br3	2.4756 (11)

Table 2
Hydrogen-bond geometry (Å, °)

D-HA	D-H	HA	DA	D-HA
C1-H1Br2	0.95	2.73	3.366 (9)	125
C3-H3Br1ⁱ	0.95	2.89	3.734 (10)	149
C10-H10Br1	0.95	2.70	3.335 (9)	125
Symmetry code: (i) x+1, y+1, z.

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.

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: FJ2332 ).

Acknowledgements

This work was supported by Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2009-0094056).

References

Bruker (2000). SADABS, SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.
Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565.
Flack, H. D. (1983). Acta Cryst. A39, 876-881.
Hambley, T. W. (1986). Acta Cryst. C42, 49-51.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Spek, A. L. (2009). Acta Cryst. D65, 148-155.

metal-organic compounds

(2,2'-Bipyridine-2N,N')tetrabromidoplatinum(IV)