Synthesis, characterization, and alkyne trimerization catalysis of a heteroleptic two-coordinate fe(i) complex.
The synthesis of the first heteroleptic, two-coordinate Fe(I) complex IPr-Fe-N(SiMe3)DIPP (1) (IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene; DIPP = 2,6-(i)Pr2-C6H3) is reported. Protonation of the Fe(II) bis(amido) complex Fe[N(SiMe3)DIPP]2 followed by addition of IPr and reduction by potassium graphite in a one-pot reaction results in good yields of 1. The redox activity of 1 and comparison between 1 and its reduction product by (57)Fe Mössbauer spectroscopy are discussed, and the reduction was found to be metal-based rather than ligand-based. The activity of 1 toward the catalytic cyclotrimerization of terminal and internal alkynes is described.
Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States.
Michael I
MI
Lipschutz
Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States.
Teera
T
Chantarojsiri
Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States.
Yuyang
Y
Dong
Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States.
T Don
TD
Tilley
D000480:Alkynes / Q000737:chemistry*; D002384:Catalysis; D003500:Cyclization; D007093:Imidazoles / Q000138:chemical synthesis / Q000737:chemistry*; D058085:Iron Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D008958:Models, Molecular; D015204:Spectroscopy, Mossbauer
C550430:1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene; D000480:Alkynes; D007093:Imidazoles; D058085:Iron Compounds