Rhodium 4,5-Diazafluorene Derivatives
system. The diffraction data for 1–3 were processed with the
DENZO-SMN[15] software package, whereas the data for 4 were
processed with the Bruker APEX2 software package (V2008.3).[16]
All structures were solved by direct methods and refined with
SHELXTL (V6.10).[17] All non-hydrogen atoms were refined aniso-
tropically except for those involved in disordering. The positions of
the hydrogen atoms were either calculated or directly located from
a difference Fourier map and their contributions were included in
the structure factor calculations. Compound 1 co-crystallized with
benzene (one benzene molecule per molecule of 1) in the triclinic
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¯
space group P1. Compound 2 co-crystallized with CH2Cl2 (two
CH2Cl2 molecules per molecule of 2) in the orthorhombic space
group Pbcm. Compound 3 co-crystallized with benzene (one ben-
zene molecule per molecule of 3) in the monoclinic space group
P21/c with two independent molecules per asymmetric unit. Com-
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¯
pound 4 crystallized in the triclinic space group P1. The co-crys-
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gram.[18] Although the identity of the solvent could not be con-
firmed by crystallography, the elemental analysis results suggest the
presence of CH2Cl2 in the crystal lattice even after vacuum drying.
The contribution of the removed solvent was not included in the
final formula and density calculations. The crystallographic data
for 1–4 are summarized in Table 2 and selected bond lengths and
angles are listed in Table 3.
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3·C6H6) and CCDC-712065 (for 4) contain the supplementary crys-
tallographic data for this paper. These data can be obtained free
of charge from the Cambridge Crystallographic Data Centre via
www.ccdc.cam.ac.uk/data_request/cif.
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Acknowledgments
[15] Z. Otwinowski, W. Minor in Methods in Enzymology, Macro-
molecular Crystallography, Part A (Eds.: C. W. Carter, R. M.
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[16] Apex 2 software package, Bruker AXS Inc., 2008.
[17] G. M. Sheldrick, Acta Crystallogr., Sect. A 2008, 64, 112–122.
[18] A. L. Spek, J. Appl. Crystallogr. 2003, 36, 7–13.
Received: December 9, 2008
This research was supported by grants to D. S. from the Natural
Science and Engineering Research Council (NSERC) of Canada,
the Canadian Foundation for Innovation, the Ontario Research
Fund (ORF) and the University of Toronto (Connaught Founda-
tion).
Published Online: February 17, 2009
Eur. J. Inorg. Chem. 2009, 2083–2089
© 2009 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
www.eurjic.org
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