title: Carboxylate free μ-oxo bridged ferric wheel with a record exchange coupling.
abstract: A novel oxo-bridged, carboxylate free 'ferric wheel' was isolated with the molecular formula [FeIII8(μ-O)4(L(2-))8] (1). Magnetic susceptibility measurements suggest that the Fe(III) ions are coupled antiferromagnetically and magnetic data modelling yields J1 = -26.4 cm(-1), J2 = -170 cm(-1) which are rationalized by DFT calculation. The exchange value for of -170 cm(-1) (Fe-O(oxo)-Fe) is the largest exchange value known compared to any homometallic or heterometallic wheel reported to date.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, India-400076. eswar@chem.iitb.ac.in rajaraman@chem.iitb.ac.in.
authors.forename: Naushad
authors.initials: N
authors.lastname: Ahmed
authors.affiliation: Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, India-400076. eswar@chem.iitb.ac.in rajaraman@chem.iitb.ac.in.
authors.forename: Apoorva
authors.initials: A
authors.lastname: Upadhyay
authors.affiliation: Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, India-400076. eswar@chem.iitb.ac.in rajaraman@chem.iitb.ac.in.
authors.forename: Thayalan
authors.initials: T
authors.lastname: Rajeshkumar
authors.affiliation: Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, India-400076. eswar@chem.iitb.ac.in rajaraman@chem.iitb.ac.in.
authors.forename: Shefali
authors.initials: S
authors.lastname: Vaidya
authors.affiliation: Faculty of Physics, Bielefeld University, P.O. Box 100131, D-33501 Bielefeld, Germany.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Schnack
authors.affiliation: Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, India-400076. eswar@chem.iitb.ac.in rajaraman@chem.iitb.ac.in.
authors.forename: Gopalan
authors.initials: G
authors.lastname: Rajaraman
authors.affiliation: Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, India-400076. eswar@chem.iitb.ac.in rajaraman@chem.iitb.ac.in.
authors.forename: Maheswaran
authors.initials: M
authors.lastname: Shanmugam