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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
Published on: December 29, 2016
Superbulky metallocene complexes of the heavier alkaline-earth metals strontium and barium
Lars Orzechowski1, Dirk F-J Piesik, Christian Ruspic
1Anorganische Chemie, Universitätsstrasse 5, 45117 Essen, Germany.
Abstract:
Superbulky sandwich complexes with the cyclopentadienyl ligand (4-nBu-C(6)H(4))(5)Cp (abbreviated here as Cp(BIG)) have been prepared by reaction of Cp(BIG)H with benzylic strontium or barium reagents. Both metallocenes have been structurally characterized by single crystal X-ray diffraction. Even for the larger metallocene (Cp(BIG))(2)Ba a highly symmetric sandwich complex with parallel Cp rings was isolated (Cp(center)-Ba = 2.667(1) A). Both structures show evidence for a C-HC(pi) network between the Cp ligands. These attractive forces induce an inward out-of-plane bending of the aryl substituents (Sr 3.4(2) degrees; Ba 5.3(2) degrees). A linear correlation between this bending angle and metal size has been found.
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