Issue 29, 2019

[E(μ-NBbp)]2 (E = P, As) – group 15 biradicals synthesized from acyclic precursors

Abstract

The synthesis of Bbp stabilized biradicals of the type [E(μ-NBbp)]2 (E = P, As) (Bbp = 2,6-bis[bis(trimethylsilyl)methyl]phenyl) was investigated. Contrary to the established synthetic protocol for terphenyl substituted biradicals [E(μ-NTer)]2 by reduction of [ClE(μ-NTer)]2, the analogous Bbp substituted precursor [ClE(μ-NBbp)]2 could only be obtained in low yields. For this reason, a new synthesis had to be found to generate [E(μ-NBbp)]2. Instead of using cyclic [ClE(μ-NBbp)]2 we prepared the acyclic Bbp–N(ECl2)2 species starting from Bbp–NH2 and ECl3 and studied the reduction with magnesium chips, which led to the formation of the desired biradicals [E(μ-NBbp)]2. All species along the reaction path were fully characterized.

Graphical abstract: [E(μ-NBbp)]2 (E = P, As) – group 15 biradicals synthesized from acyclic precursors

Supplementary files

Article information

Article type
Paper
Submitted
18 Apr 2019
Accepted
15 Jun 2019
First published
17 Jun 2019

Dalton Trans., 2019,48, 11103-11111

[E(μ-NBbp)]2 (E = P, As) – group 15 biradicals synthesized from acyclic precursors

J. Bresien, A. Schulz, L. S. Szych, A. Villinger and R. Wustrack, Dalton Trans., 2019, 48, 11103 DOI: 10.1039/C9DT01654F

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