were inserted in calculated positions. Least square refinement
with anisotropic thermal motion parameters for all the non-
hydrogen atoms and isotropic for the remaining were employed.
Crystallographic parameters and residuals are given in Table 1.
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Acknowledgements
This work has been partially supported by the Fundac¸a˜o
para a Cieˆncia e a Tecnologia (FCT) and its POCI 2010
program (FEDER funded) (Portugal). S. M. and J. L. ex-
presses gratitude to FCT for their post-doc fellowships (grants
SFRH/BPD/14690/2003 and SFRH/BPD/20927/2004).
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5304 | Dalton Trans., 2007, 5297–5304
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