Di-μ-bromido-bis­({bis­[2-(2-pyrid­yl)eth­yl]amine}copper(II)) bis­(perchlorate)

Butcher, R.J.; Gultneh, Y.; Yisgedu, T.B.; Tesema, Y.T.

doi:10.1107/S1600536807068663

Volume 64
Part 2
Page m323
February 2008

Received 19 December 2007
Accepted 28 December 2007
Online 9 January 2008

Key indicators
Single-crystal X-ray study
T = 293 K
Mean (C-C) = 0.008 Å
Disorder in solvent or counterion
R = 0.043
wR = 0.095
Data-to-parameter ratio = 15.4
Details

Di--bromido-bis({bis[2-(2-pyridyl)ethyl]amine}copper(II)) bis(perchlorate)

Ray J. Butcher,^a ^* Yilma Gultneh,^a Teshome B. Yisgedu ^a and Yohannes T. Tesema ^a

^aDepartment of Chemistry, Howard University, 525 College Street NW, Washington, DC 20059, USA
Correspondence e-mail: rbutcher99@yahoo.com

Each Cu atom in the dinuclear centrosymmetric title complex, [Cu₂Br₂(C₁₄H₁₇N₃)₂](ClO₄)₂, is ligated in a distorted square-pyramidal geometry ( [tau] = 0.31) by a tridentate bis[2-(2-pyridyl)ethyl]amine ligand, and by two bridging Br atoms. In addition, the dinuclear species is stabilized by two hydrogen-bonded perchlorate anions.

Related literature

For related literature, see: Chakrabarty et al. (2004); Helis et al. (1977); Marsh et al. (1983); Udugala-Ganehenege, et al. (2001); Xu et al. (2000). For the calculation of the coordination geometry, see: Addison et al. (1984).

Experimental

Crystal data

[Cu₂Br₂(C₁₄H₁₇N₃)₂](ClO₄)₂
M_r = 940.41
Triclinic, $[P \overline 1]$
a = 6.8002 (13) Å
b = 11.413 (2) Å
c = 12.668 (2) Å
= 67.212 (8)°
= 77.019 (13)°
= 87.033 (15)°
V = 882.6 (3) Å³
Z = 1
Mo K radiation
= 3.67 mm^-1
T = 293 (2) K
0.42 × 0.21 × 0.18 mm

Data collection

Bruker P4 diffractometer
Absorption correction: scan (North et al., 1968) T_min = 0.569, T_max = 0.948 (expected range = 0.310-0.516)
3951 measured reflections
3936 independent reflections
2960 reflections with I > 2I)
R_int = 0.018
3 standard reflections every 97 reflections intensity decay: <2%

Refinement

R[F² > 2(F²)] = 0.042
wR(F²) = 0.095
S = 1.04
3936 reflections
255 parameters
50 restraints
H-atom parameters constrained
_max = 0.50 e Å^-3
_min = -0.36 e Å^-3

Table 1
Hydrogen-bond geometry (Å, °)

D-HA	D-H	HA	DA	D-HA
N-H0AO14A	0.91	2.34	3.205 (12)	159
N-H0AO13B	0.91	2.44	3.089 (18)	129
C6A-H6ABBrⁱ	0.97	2.70	3.588 (4)	153
C6B-H6BCBrⁱⁱ	0.97	2.89	3.706 (4)	142
C6B-H6BBO13Bⁱⁱⁱ	0.97	2.57	3.487 (18)	158
C2A-H2AAO11A^iv	0.93	2.52	3.162 (14)	126
C7A-H7AAO12A^v	0.97	2.51	3.322 (16)	141
C7A-H7AAO13B	0.97	2.49	3.179 (15)	128
C3A-H3AAO13A^vi	0.93	2.54	3.142 (12)	122
Symmetry codes: (i) -x+1, -y+2, -z+1; (ii) -x+2, -y+2, -z+1; (iii) x+1, y, z; (iv) x+1, y-1, z; (v) -x, -y+2, -z+2; (vi) x, y-1, z.

Data collection: XSCANS (Bruker, 1997); cell refinement: XSCANS; data reduction: XSCANS; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Bruker, 2000); software used to prepare material for publication: SHELXTL.

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: TK2238 ).

Acknowledgements

RJB acknowledges the DoD for funds to upgrade the diffractometer.

References

Addison, A. W., Rao, T. N., Reedijk, J., van Rijn, J. & Verschoor, G. C. (1984). J. Chem. Soc. Dalton Trans. pp. 1349-1356.
Bruker (1997). XSCANS. Version 2.20. Bruker AXS Inc., Madison, Wisconsin, USA.
Bruker (2000). SHELXTL. Version 6.12. Bruker AXS Inc., Madison, Wisconsin, USA.
Chakrabarty, S., Poddar, R. K., Poulsen, R. D., Thompson, A. L. & Howard, J. A. K. (2004). Acta Cryst. C60, m628-m630.
Helis, H. M., Goodman, W. H., Wilson, R. B., Morgan, J. A. & Hodgson, D. J. (1977). Inorg. Chem. 16, 2412-2416.
Marsh, W. E., Patel, K. C., Hatfield, W. E. & Hodgson, D. J. (1983). Inorg. Chem. 22, 511-515.
North, A. C. T., Phillips, D. C. & Mathews, F. S. (1968). Acta Cryst. A24, 351-359.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Udugala-Ganehenege, M. Y., Heeg, M. J., Hryhorczuk, L. M., Wenger, L. E. & Endicott, J. F. (2001). Inorg. Chem. 40, 1614-1625.
Xu, Z., White, S., Thompson, L. K., Miller, D. O., Ohba, M., Okawa, H., Wilson, C. & Howard, J. A. K. (2000). J. Chem. Soc. Dalton Trans. pp.1751-1757.

metal-organic compounds