Crystal structure of bis(μ2-tri-phenyl-acetato-κ OO')bis(diisobutylaluminium)

Acta Crystallogr E Crystallogr Commun. 2019 Mar 15;75(Pt 4):456-459. doi: 10.1107/S2056989019003396. eCollection 2019 Apr 1.

Abstract

Single crystals of the title compound, [Al(iBu)2(O2CCPh3)]2 or [Al2(C4H9)4(C20H15O2)2], have been formed in the reaction between tris-(tetra-hydro-furan)-tris-(tri-phenyl-acetato)-neodymium, [Nd(Ph3CCOO)3(THF)3], and triiso-butyl-aluminium, Al(iBu)3, in hexane followed by low-temperature crystallization (243 K) from the reaction mixture. The structure has triclinic (P ) symmetry at 120 K. The dimeric complex [Al(iBu)2(O2CCPh3-μ-κOO')]2 is located about an inversion centre. The tri-phenyl-acetate ligand displays a μ-κOO'-bridging coordination mode, leading to the formation of an octa-gonal Al2O4C2 core. The complex displays HPh⋯CPh inter-molecular inter-actions.

Keywords: TIBA; aluminium; coordination compound; crystal structure; tri­phenyl­acetate.