Trapping of transient, heavy pnictogen-centred biradicals†
J.
Bresien, 
a
A.
Schulz
*ac
and
a
A.
Schulz
*ac
and
Abstract
Since the heavy biradicals [E(μ-NTer)]2 (E = Sb, Bi) are only of fleeting existence in solution, they were generated in situ and trapped by [2 + 2] addition reactions utilizing alkynes such as tolan (Ph–C![[triple bond, length as m-dash]](https://www.rsc.org/images/entities/char_e002.gif)
C–Ph). The structure, biradical character and bonding of [E(μ-NTer)]2 biradicals as well as their addition products are discussed on the basis of computations and experimental data.
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