Carboxylate free mu-oxo bridged ferric wheel with a record exchange coupling

Ahmed N, Upadhyay A, Rajeshkumar T, Vaidya S, Schnack J, Rajaraman G, Shanmugam M (2015)
Dalton Transactions 44(43): 18743-18747.

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Abstract
A novel oxo-bridged, carboxylate free 'ferric wheel' was isolated with the molecular formula [Fe-8(III)(mu-O)(4)(L2-)(8)] (1). Magnetic susceptibility measurements suggest that the Fe(III) ions are coupled anti-ferromagnetically and magnetic data modelling yields J(1) = -26.4 cm(-1), J(2) = -170 cm(-1) which are rationalized by DFT calculation. The exchange value for 1 of -170 cm(-1) (Fe-O(oxo)-Fe) is the largest exchange value known compared to any homometallic or heterometallic wheel reported to date.
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Ahmed N, Upadhyay A, Rajeshkumar T, et al. Carboxylate free mu-oxo bridged ferric wheel with a record exchange coupling. Dalton Transactions. 2015;44(43):18743-18747.
Ahmed, N., Upadhyay, A., Rajeshkumar, T., Vaidya, S., Schnack, J., Rajaraman, G., & Shanmugam, M. (2015). Carboxylate free mu-oxo bridged ferric wheel with a record exchange coupling. Dalton Transactions, 44(43), 18743-18747.
Ahmed, N., Upadhyay, A., Rajeshkumar, T., Vaidya, S., Schnack, J., Rajaraman, G., and Shanmugam, M. (2015). Carboxylate free mu-oxo bridged ferric wheel with a record exchange coupling. Dalton Transactions 44, 18743-18747.
Ahmed, N., et al., 2015. Carboxylate free mu-oxo bridged ferric wheel with a record exchange coupling. Dalton Transactions, 44(43), p 18743-18747.
N. Ahmed, et al., “Carboxylate free mu-oxo bridged ferric wheel with a record exchange coupling”, Dalton Transactions, vol. 44, 2015, pp. 18743-18747.
Ahmed, N., Upadhyay, A., Rajeshkumar, T., Vaidya, S., Schnack, J., Rajaraman, G., Shanmugam, M.: Carboxylate free mu-oxo bridged ferric wheel with a record exchange coupling. Dalton Transactions. 44, 18743-18747 (2015).
Ahmed, Naushad, Upadhyay, Apoorva, Rajeshkumar, Thayalan, Vaidya, Shefali, Schnack, Jürgen, Rajaraman, Gopalan, and Shanmugam, Maheswaran. “Carboxylate free mu-oxo bridged ferric wheel with a record exchange coupling”. Dalton Transactions 44.43 (2015): 18743-18747.
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PMID: 26479520
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