Synthesis and Characterization of a 1,2,4-Diazarsolide Anion

William D Jobbins; Bono van IJzendoorn; Meera Mehta

doi:10.1021/acs.organomet.4c00476

Synthesis and Characterization of a 1,2,4-Diazarsolide Anion

Organometallics. 2024 Dec 30;44(1):14-18. doi: 10.1021/acs.organomet.4c00476. eCollection 2025 Jan 13.

Authors

William D Jobbins¹, Bono van IJzendoorn², Meera Mehta²

Affiliations

¹ Department of Chemistry, University of Manchester, Oxford Rd, Manchester, M13 9PL, United Kingdom.
² Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, United Kingdom.

Abstract

Cyclopentadienyl anions ([Cp]^-) are pervasive ligands in coordination chemistry. In contrast, heavy-element derivatives of these ligands, particularly those that feature arsenic, are not as well developed. In this work, a new arsenic-based heterocycle with a structure analogous to [Cp]^- is presented. Reaction of K₃As₇ with benzyl azide (BnN₃) leads to fragmentation of the [As₇]^3- core and C-H activation of two [BnN] units to give the five-membered arsenic heterocycle [As(NC(Ph))₂]^-. This arsenic heterocycle was studied by nuclear magnetic resonance and UV-vis spectroscopy, X-ray diffraction, and its electronic structure was investigated computationally.