Pnictogen Bonding at the Core of a Carbene-Stiborane-Gold Complex: Impact on Structure and Reactivity

Castro Castro, Paula; Gabbaï, François P.

doi:10.1021/acs.organomet.4c00347

Title: Pnictogen Bonding at the Core of a Carbene-Stiborane-Gold Complex: Impact on Structure and Reactivity

Journal Article · 26 September 2024 · Organometallics

DOI: https://doi.org/10.1021/acs.organomet.4c00347 · OSTI ID:2466293

Castro Castro, Paula ^[1];

^[1]

Texas A&M University, College Station, TX (United States)

Our interest in the design of ambiphilic ligands and their coordination to gold has led us to synthesize an indazol-3-ylidene gold chloride complex functionalized at the 4-position of the indazole backbone by a stibine functionality. The antimony center of this new complex cleanly reacts with o-chloranil to afford the corresponding stiborane derivative. Structural analysis indicates that the stiborane coordination environment is best described as a distorted square pyramid whose open face is oriented toward the gold center, allowing for the formation of a long donor–acceptor, or pnictogen, Au → Sb bonding interaction. The presence of this interaction, which has been probed computationally, is also manifested in the enhanced catalytic activity of this complex in the cyclization of N-propargyl-4-fluorobenzamide.

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Research Organization:: Texas A&M University, College Station, TX (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES); Welch Foundation

Grant/Contract Number:: SC0023269

OSTI ID:: 2466293

Journal Information:: Organometallics, Journal Name: Organometallics Journal Issue: 19 Vol. 43; ISSN 0276-7333; ISSN 1520-6041

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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