Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 26, Issue 68, Pages 16019-16027Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202002678
Keywords
borylation; diazenido tungsten complexes; dinitrogen functionalization
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Funding
- Julius-Maximilians-Universitat Wurzburg
- Deutsche Forschungsgemeinschaft (DFG)
- Government of Canada
- Alexander von Humboldt Stiftung
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Projekt DEAL
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Boron tribromide and aryldihaloboranes were found to undergo 1,3-haloboration across one W-N equivalent to N moiety of a group 6 end-on dinitrogen complex (i.e.trans-[W(N-2)(2)(dppe)(2)]). The N-borylated products consist of a reduced diazenido unit sandwiched between a W(II)center and a trivalent boron substituent (W-N=N-BXAr), and have all been fully characterized by NMR and IR spectroscopy, elemental analysis, and single-crystal X-ray diffraction. Both the terminal N atom and boron center in the W-N=N-BXAr unit can be further derivatized using electrophiles and nucleophiles/Lewis bases, respectively. This mild reduction and functionalization of a weakly activated N(2)ligand with boron halides is unprecedented, and hints at the possibility of generating value-added nitrogen compounds directly from molecular dinitrogen.
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