μ-(2,2′-Bipyrimidine)-bis­[dichlorido­palladium(II)] dimethyl­formamide monosolvate

Young, C.; Roodt, A.; Bezuidenhoudt, B.C.B.

doi:10.1107/S1600536812040779

Volume 68
Part 11
Page m1374
November 2012

Received 14 September 2012
Accepted 27 September 2012
Online 20 October 2012

Key indicators
Single-crystal X-ray study
T = 100 K
Mean (C-C) = 0.005 Å
H completeness 47%
Disorder in solvent or counterion
R = 0.028
wR = 0.059
Data-to-parameter ratio = 16.3
Details

-(2,2'-Bipyrimidine)-bis[dichloridopalladium(II)] dimethylformamide monosolvate

Cyril Young,^a ^* Andreas Roodt ^a and Barend C. B. Bezuidenhoudt ^a

^aDepartment of Chemistry, University of the Free State, PO Box 339, Bloemfontein, 9300, South Africa
Correspondence e-mail: technetium3006@hotmail.com

In the title compound, [Pd₂Cl₄(C₈H₆N₄)]·C₃H₇NO, the two Pd²⁺ cations have a distorted square-planar coordination sphere and are bridged by a bis-bidentate 2,2'-bipyrimidine ligand. Two terminal chloride anions are also bonded to each of the Pd²⁺ cations. The dinuclear complex and the dimethylformamide solvate molecule lie on the intersection of a twofold rotation axis and a mirror plane, with disorder present in the solvate molecule. There is a slight distortion from the square-planar metal geometry, as indicated by the bite angles of 81.77 (13)° and 91.63 (5)°. The C and O atoms of the solvent molecule are disordered over two sets of sites of equal occupancy.

Related literature

The title compound is structurally related to the mono-coordinated species reported by Hudgens et al. (1997). For background literature on homogenous catalyst models, see: Van Leeuwen (2004); Meij et al. (2005); Otto et al. (2003); Steyn et al. (1997). For related structures, see: Inagaki et al. (2007); Maekawa et al. (1994). The mono-coordinated platinum counterpart was reported by Kawakami et al. (2006). For the synthetic procedure, see: Boyle et al. (2004).

Experimental

Crystal data

[Pd₂Cl₄(C₈H₆N₄)]·C₃H₇NO
M_r = 578.81
Monoclinic, C 2/m
a = 10.7299 (6) Å
b = 14.2399 (7) Å
c = 5.9381 (3) Å
= 108.229 (2)°
V = 861.76 (8) Å³
Z = 2
Mo K radiation
= 2.71 mm^-1
T = 100 K
0.09 × 0.09 × 0.08 mm

Data collection

Bruker APEXII diffractometer
Absorption correction: multi-scan (SADABS; Bruker, 2008) T_min = 0.785, T_max = 0.814
6102 measured reflections
1108 independent reflections
975 reflections with I > 2(I)
R_int = 0.041

Refinement

R[F² > 2(F²)] = 0.028
wR(F²) = 0.059
S = 1.11
1108 reflections
68 parameters
H-atom parameters constrained
_max = 0.75 e Å^-3
_min = -0.79 e Å^-3

Data collection: APEX2 (Bruker, 2008); cell refinement: SAINT-Plus (Bruker, 2008); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg & Putz, 2005); software used to prepare material for publication: WinGX (Farrugia, 1999).

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: GG2102 ).

Acknowledgements

Financial assistance from the University of the Free State, NRF(THRIP) and Sasol is gratefully acknowledged, while Theunis Muller is thanked for the data collection.

References

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metal-organic compounds