Self-assembled Transition Metal Coordination Frameworks of ...

Chapter 3 _ g__ g pg 7
it is small, as water can play a crucial role in molecular association and aggregation
and is almost a philosophical abstraction. Single crystal X-ray study of la reveal
octahedral geometries around the Ni(ll) centers. Variable temperature magnetic
susceptibility of all the Ni(Il) square grids 1, 2, 3 and 4 were investigated. Magnetic
data have been rationalized successfully on the basis of expected square grid
structures, as supported by single crystal X-ray study and MALDI MS spectra. The
magnetostructural correlation study reveals intramolecular antiferromagnetic coupling
between the Ni(II) electrons by a super exchange mechanism through the intervening
sulfur/oxygen atoms, consistent with the bridging structural arrangement. The field
dependence of magnetic susceptibility curves also were found to be consistent with
antiferromagnetic nature for all the square grid complexes.
References
1. R.S. Nyholm, Chem. Rev. 53 (1953) 263.
2. H.E. Shook Jr, I.B. Thompson, U.S. Patent (1975) 3903120.
3. M.A. Halcrow, G. Christou, Chem. Rev. 94 (1994) 2421.
4. S. Chandra, L.K. Gupta, Spectrochim. Acta Part A 62 (2005) 1089.
5. Z. Afrasiabi, E. Sinn, W. Lin, Y. Ma, C. Campana, S. Padhye, J. Inorg.
Biochem. 99 (2005) 1526.
6. M.B. Ferrari, S. Capacchi, G. Reffo, G. Pelosi, P. Tarasconi, R. Albertini, S.
Pinelli, P. Lunghi, J. Inorg. Biochem. 8| (2000) 89.
7. H.G. Petering, G.J. Van Giessen, Biochem. Copper. Proc. Symp. (1966) 197.
8. C. He, C.-y. Duan, C.-j. Fang, Y.-j. Liu, Q.-j. Meng, J. Chem. Soc., Dalton
Trans. (2000) 1207.
9. L.K. Thompson, L. Zhao, Z. Xu, D.O. Miller, W.M. Reiff, Inorg. Chem. 42
(2003) 128.
10. T.K. Paine, E. Rentschler, T. Weyhermuller, P. Chaudhuri, Eur. J. Inorg.
120