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Updated: Jun 1, 2026

A Two-Step Protocol for Umpolung Functionalization of Ketones Via Enolonium Species
Published on: August 16, 2018
2-(1,2,3,4-Tetra-hydro-phenanthren-1-yl-idene)malononitrile
George B Ettenger1, Brian Wesley Williams, Daniel Brillhart
1Department of Chemistry, Bucknell University, Lewisburg, PA 17837, USA.
Abstract:
In the title complex, C(17)H(12)N(2), the non-aromatic six-membered ring adopts an envelope conformation. The dihedral angle between the eight-membered plane containing the malononitrile group and the aromatic system is 25.88 (4)°. The distance from the central C atom of the malononitrile group to the centroid of the n-glide-related distal aromatic ring is 3.66 Å, suggesting π-π inter-actions.
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