Oxidation, Coordination, and Nickel‐Mediated Deconstruction of a Highly Electron‐Rich Diboron Analogue of 1,3,5‐Hexatriene
Alexander Hermann, Felipe Fantuzzi, Merle Arrowsmith, Theresa Zorn, Ivo Krummenacher, Benedikt Ritschel, Krzysztof Radacki, Bernd Engels, Holger Braunschweig
Abstract
Abstract The reductive coupling of an N‐heterocyclic carbene (NHC) stabilized (dibromo)vinylborane yields a 1,2‐divinyldiborene, which, although isoelectronic to a 1,3,5‐triene, displays no extended π conjugation because of twisting of the C 2 B 2 C 2 chain. While this divinyldiborene coordinates to copper(I) and platinum(0) in an η 2 ‐B 2 and η 4 ‐C 2 B 2 fashion, respectively, it undergoes a complex rearrangement to an η 4 ‐1,3‐diborete upon complexation with nickel(0).
Topics & Concepts
NickelCarbeneChemistryPlatinumCopperElectronPhotochemistryStereochemistryCrystallographyMedicinal chemistryOrganic chemistryCatalysisPhysicsQuantum mechanicsOrganoboron and organosilicon chemistrySynthesis and characterization of novel inorganic/organometallic compoundsBoron Compounds in Chemistry