Abstract
AbstractA complete cleavage of the triple bond of N2 by fluoroborylene (:BF) was achieved in a low‐temperature N2 matrix by the formation of the four‐membered heterocycle FB(μ‐N)2BF, which lacks a trans‐annular N−N bond. Additionally, the linear complex FB=N−N=BF and cyclic FB(η2‐N2) were formed. These novel species were characterized by their matrix infrared spectra and quantum‐chemical calculations. The puckered four‐membered‐ring B2N2 complex shows a delocalized aromatic two‐electron π‐system in conjugation with the exo‐cyclic fluorine π lone pairs. This work may contribute to a rational design of catalysts based on borylene for artificial dinitrogen activation.
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