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127
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grown from layering a saturated CH CN and chloroben-
3
zene solution with diethyl ether. Suitable crystals of 7a
were mounted on a glass fiber in a random orientation. The
structures were solved by direct methods and all non-
hydrogen atoms were subjected to anisotropic refinement
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2
by full-matrix least squares on F using the SHELXTL
package. Data collection was performed at room temper-
ature on a Bruker SMART 1000 CCD diffractometer
9
. Baker, M.V., Brown, D.H., Simpson, P.V., Skelton, B.W., White,
A.H.: Synthesis and characterisation of alkoxybenzimidazolin-2-
ylidene palladium complexes: the effect of ancillary ligands on
the behaviour of pre-catalysts. Eur. J. Inorg. Chem. 1977–1988
operating at 50 kV and 20 mA using Mo-Ka radiation
˚
0.71073 A). An empirical absorption correction was
(
applied using the SADABS program. All hydrogen atoms
(
2009)
were generated geometrically (C–H bond lengths fixed at
˚
1
1
0. Peris, E., Crabtree, R.H.: Recent homogeneous catalytic appli-
cations of chelate and pincer N-heterocyclic carbenes. Coord.
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1. Chiu, P.L., Chen, C.Y., Zeng, J.Y., Lu, C.Y., Lee, H.M.: Coor-
dination polymers of silver(I) with bis(N-heterocyclic carbene):
structural characterization and carbene transfer. J. Organomet.
Chem. 690, 1682–1687 (2005)
0
.96 A), assigned appropriated isotropic thermal parame-
ters and included in structure factor calculations.
Supplementary material
1
2. Magill, A.M., McGuinness, D.S., Cavell, K.J., Britovsek, G.J.P.,
Gibson, V.C., White, A.J.P., Williams, D.J., White, A.H., Skel-
ton, B.W.: Palladium(II) complexes containing mono-, bi- and
tridentate carbene ligands. Synthesis, characterisation and appli-
cation as catalysts in C—C coupling reactions. J. Organomet.
Chem. 617, 546–560 (2001)
Crystallographic data for the structure reported in this
paper has been deposited with the Cambridge Crystallo-
graphic Data Center: CCDC-714292 contains the supple-
mentary crystallographic data for this paper. These data
0
1
3. Caballero, E., D ´ı ez-Barra, F.A., Jal o´ n, S., Merino, J.: 1,1 -(Pyri-
dine-2,6-diyl)bis(3-benzyl-2,3-dihydro-1H-imidazol-2-ylidene), a
new multidentate N-heterocyclic biscarbene and its silver(I) com-
plex derivative. J. Organomet. Chem. 617–618, 395–398 (2001)
4. Coleman, K.S., Turberville, S., Pascu, S.I., Green, M.L.H.:
Synthesis of a new bidentate ferrocenyl N-heterocyclic carbene
ligand precursor and the palladium (II) complex trans-
1
Acknowledgments We acknowledge financial support from the
Research Fund for the Education Department of Shanxi Province (No.
0
0
0
2
010111) and the financial support from the Opening Foundation of
[PdCl2(C#fc#C)], where (C#fc#C) = 1,1 -di-tert-butyl-3,3 -(1,1 -
dimethyleneferrocenyl)-diimidazol-2-ylidene. J. Organomet.
Chem. 690, 653–658 (2005)
Key Laboratory of Shanxi Province (No. 2009011059-7) and the
Shanxi Natural Science Foundation of China (No. 2006011069 and
No. 2011011006-4).
15. Wang, J.-W., Li, Q.-S., Xu, F.-B., Song, H.-B., Zhang, Z.-Z.:
Synthetic and structural studies of silver(I)- and gold(I)-con-
taining N-heterocyclic carbene metallacrown ethers. Eur. J. Org.
Chem. 1310–1316 (2006)
6. Herrmann, W.A., Schwarz, J., Gardiner, M.G.: High-yield syn-
theses of sterically demanding bis(N-heterocyclic carbene) com-
plexes of palladium. Organometallics 18, 4082–4089 (1999)
17. Lee, H.M., Lu, C.Y., Chen, C.Y., Chen, W.L., Lin, H.C., Chiu,
P.L., Cheng, P.Y.: Palladium complexes with ethylene-bridged
bis(N-heterocyclic carbene) for C–C coupling reactions. Tetra-
hedron 60, 5807–5825 (2004)
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