Structures and bonding of homoleptic bis(2,3-dihydro-1,3-diborole) complexes of 
nickel and platinum

Wadepohl, Hubert; Krüger, Carl; Siebert, Walter

doi:10.1016/j.jorganchem.2015.06.014

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Structures and bonding of homoleptic bis(2,3-dihydro-1,3-diborole) complexes of nickel and platinum

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Krüger, Carl
Service Department Krüger (XRAY), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Wadepohl, H., Krüger, C., & Siebert, W. (2015). Structures and bonding of homoleptic bis(2,3-dihydro-1,3-diborole) complexes of nickel and platinum. Journal of Organometallic Chemistry, 798(1), 146-151. doi:10.1016/j.jorganchem.2015.06.014.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-72DC-5

Abstract

Homoleptic metal complexes of the boron heterocycle 2,3-dihydro-1,3-diborole {(R¹C)₂(R²B)₂R³(H)C} 1 are described. X-Ray crystal structure determinations of two nickel and platinum derivatives are presented. In the nickel complex [Ni(1d)₂] 6d (R¹ = R² = R³ = Et) the essentially coplanar heterocycles attain a pentahapto coordination mode with a gauche orientation with respect to one another. An 18 VE count is attained. In contrast, in the 14 VE platinum complex [Pt(1a)₂] 4a (R¹ = R² = Et, R³ = Me) the ligands are strongly folded and adopt a tetrahapto coordination. The molecule is centrosymmetric in the crystalline state. DFT MO calculations are presented to establish the relative stabilities of these coordination modes for nickel and platinum, respectively.