Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 35, Pages 10202-10205Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201504922
Keywords
ambiphilic ligands; ferrocenes; Lewis acids; planar chirality; redox activity
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Funding
- Petroleum Research Fund [45648-AC3]
- National Science Foundation [CRIF 0443538, MRI 1229030]
- Rutgers University
- Petroleum Research Fund (ACS SUMR)
- Direct For Mathematical & Physical Scien [1229030] Funding Source: National Science Foundation
- Division Of Chemistry [1229030] Funding Source: National Science Foundation
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A new class of Janus-like ambiphilic ligands is introduced. The rigid diferrocene backbone in heterocycles 4-SnP and 4-BP creates an unprecedented chiral environment as demonstrated by multinuclear NMR and single-crystal X-ray studies. In addition, the ligands are redox-responsive and the Lewis acidic borane moiety in 4-BP can be exploited to further tune the properties: a clear decrease in the CO stretching frequency of a Vaska-type RhI complex 5-BP is observed upon addition of fluoride ions. Thus, the Lewis acid and Lewis base sites influence each other and their strength can be modulated by redox chemistry and anion binding.
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