Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 135, Issue 20, Pages 7777-7787Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja403133f
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Funding
- Chemical Sciences, Geosciences, and Biosciences Division of the Office of Basic Energy Sciences of the Department of Energy [DE-FG03-86ER13514]
- U.S. National Science Foundation [CHE-1213382]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1213382] Funding Source: National Science Foundation
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The reactivity of the unusual oxyaryl dianionic ligand, ((C6H2Bu2)-Bu-t-3,5-O-4)(2-), in the Bi3+ NCN pincer complex Ar'Bi((C6H2Bu2)-Bu-t-3,5-O-4), 1, [Ar' = 2,6-(Me2NCH2)(2)C6H3] has been explored with small molecule substrates and electrophiles. The first insertion reactions of CO2 and COS into Bi-C bonds are observed with this oxyaryl dianionic ligand complex. These reactions generate new dianions that have quinoidal character similar to the oxyaryl dianionic ligand in 1. The oxyarylcarboxy and oxyarylthiocarboxy dianionic ligands were identified by X-ray crystallography in Ar'Bi[O2C((C6H2Bu2)-Bu-t-3-5-O-4)-kappa O-2,O'], 2, and Ar'B[OSC((C6H2Bu2)-Bu-t-3-5-O-4)-kappa O-2,S], 3, respectively. Silyl halides and pseudohalides, R3SiX (X = Cl, CN, N-3; R = Me, Ph), react with 1 by attaching X to bismuth and R3Si to the oxyaryl oxygen to form Ar'Bi(X)((C6H2Bu2)-Bu-t-3,5-OSiR3-4) complexes, a formal addition across five bonds. These react with additional R3SiX to generate Ar'BiX2 complexes and (R3SiOC6H3Bu2)-Bu-t-2,6. The reaction of 1 with I-2 forms Ar'BiI2 and the coupled quinone, 3,3',5,5'-tetra-tert-butyl-4,4'-diphenoquinone, by oxidative coupling.
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