title: Ground spin state variability in [Fe4S4(SR)4]3-.  Synthetic analogs of the reduced clusters in ferredoxins and other iron-sulfur proteins:  cases of extreme sensitivity of electronic state and structure to extrinsic factors.
authors.forename: M J
authors.initials: MJ
authors.lastname: Carney
authors.forename: G C
authors.initials: GC
authors.lastname: Papaefthymiou
authors.forename: K
authors.initials: K
authors.lastname: Spartalian
authors.forename: R B
authors.initials: RB
authors.lastname: Frankel
authors.forename: R H
authors.initials: RH
authors.lastname: Holm