Superbulky metallocene complexes of the heavier alkaline-earth metals strontium and barium

Dalton Transactions : an International Journal of Inorganic Chemistry
Lars OrzechowskiSjoerd Harder

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.

Citations

Mar 22, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Matthias ReinersMarc D Walter
Feb 10, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Andreas GlöcknerMarc D Walter
Mar 24, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Matthew JeleticMuralee Murugesu
Mar 8, 2016·Inorganic Chemistry·Uttam ChakrabortyRobert Wolf
Nov 30, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Markus KreyeMarc D Walter
Jan 28, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Martin LindsjöLars Kloo
Jan 11, 2011·Journal of the American Chemical Society·Volker LorenzFrank T Edelmann
Nov 27, 2021·Chemistry, an Asian Journal·Sudip BaguliDebabrata Mukherjee

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