Gold complexes with remote-substituted amino N-heterocyclic carbenes†
Sofie M. P.
Vanden Broeck, 
‡a
Nikolaos V.
Tzouras,
‡ab
Kristof
Van Hecke,
a
Luigi
Cavallo,
cd
Pierre
Braunstein,
e
Steven P.
Nolan,
*a
Andreas A.
Danopoulos
*b
and
Catherine S. J.
Cazin
*a
‡a
Nikolaos V.
Tzouras,
‡ab
Kristof
Van Hecke,
a
Luigi
Cavallo,
cd
Pierre
Braunstein,
e
Steven P.
Nolan,
*a
Andreas A.
Danopoulos
*b
and
Catherine S. J.
Cazin
*a
Abstract
The 4-RN-1,3-Ar2-imidazolium salt, R = iPr, tBu, Ar = Mes, Dipp, Mes = mesityl, Dipp = 2,6-bis-diisopropyl-phenyl was metalated by AuI at the C2-, C5- and 4-RN positions depending on the reactants and conditions employed; a rare direct rearrangement of a AuI aminide to an abnormal imidazol-5-ylidene AuI complex was also observed and based on a DFT study it may involve TfO− facilitated H+ transfer.
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