title: Self-assembly of tetrahedral and trigonal antiprismatic clusters [Fe4(L4)4] and [Fe6(L5)6] on the basis of trigonal tris-bidentate chelators.
abstract: In a one-pot reaction, the tetranuclear iron chelate complex [Fe4(L4)4] 6 was generated from benzene-1,3,5-tricarboxylic acid trichloride (4), bis-tert-butyl malonate (5a), methyllithium, and iron(II) dichloride under aerobic conditions. Alternatively, hexanuclear iron chelate complex [Fe(L5)6] 7 was formed starting from bis-para-tolyl malonate (5b) by employing identical reaction conditions to those applied for the synthesis of 6. The clusters 6 and 7 are present as racemic mixtures of homoconfigurational (delta,delta,delta,delta)/(lambda,lambda,lambda,lambda)-fac or (delta,delta,delta,delta,delta,delta)/(lambda,lambda,lambda,lambda,lambda,lambda)-fac stereoisomers. The structures of 6 and 7 were unequivocally resolved by single-crystal X-ray analyses. The all-iron(III) character of 6 and 7 was determined by Mössbauer spectroscopy.
authors.affiliation: Institut für Organische Chemie, Universität Erlangen-Nürnberg, Erlangen, Germany. saalfrank@organik.uni-erlangen.de
authors.forename: Rolf W
authors.initials: RW
authors.lastname: Saalfrank
authors.forename: Horst
authors.initials: H
authors.lastname: Glaser
authors.forename: Bernhard
authors.initials: B
authors.lastname: Demleitner
authors.forename: Frank
authors.initials: F
authors.lastname: Hampel
authors.forename: Mubarik M
authors.initials: MM
authors.lastname: Chowdhry
authors.forename: Volker
authors.initials: V
authors.lastname: Schünemann
authors.forename: Alfred X
authors.initials: AX
authors.lastname: Trautwein
authors.forename: Gavin B M
authors.initials: GB
authors.lastname: Vaughan
authors.forename: Robert
authors.initials: R
authors.lastname: Yeh
authors.forename: Anna V
authors.initials: AV
authors.lastname: Davis
authors.forename: Kenneth N
authors.initials: KN
authors.lastname: Raymond