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grown by slow diffusion of hexane into a dichlorometh-
ane solution of the complex. Selected crystal data and
data collection parameters are given in Table 4. Data
were collected on a Siemens Smart CCD diffractometer
using graphite monochromated Mo Ka radiation
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Financial assistance received from the Department of
Science and Technology, New Delhi, India [Grant No.
SR/S1/IC-15/2004] is gratefully acknowledged. The
authors thank the RSIC at Central Drug Research Insti-
tute, Lucknow, India, for the C,H,N analysis data, and
the Department of Chemistry, Indian Institute of Tech-
nology – Kanpur, India, for the X-ray diffraction data of
complex 13. Thanks also to Dr. Surajit Chattopadhyay,
Department of Chemistry, Kalyani University, for his
help with the IR spectral measurements. R.A. thanks
the Council of Scientific and Industrial Research, New
Delhi for her fellowship [Grant No. 9/96(438)2004 –
EMR-I].
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Crystallographic data for structural analysis have
been deposited with the Cambridge Crystallographic
Data Centre, CCDCs 265561–265563 for complex 5,
12 and 13, respectively. Copies of this information
may be obtained free of charge from The Director,
CCDC, 12 Union Road, Cambridge, CB2 1EZ, UK,
fax (int code): +44 1223 336 033, or email: depos-
Partial molecular orbital diagrams of complex 7 (Fig.
S1), complex 12 (Fig. S2), and complex 13 (Fig. S3)
are available as supporting information. Supplementary
data associated with this article can be found, in the on-
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