Synthesis of a Bis(NHC)Pd complex via oxidative addition of a C-C bond in a biimidazolium ion
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The formation of a cyclophane-NHC complex of Pd-(II) Via oxidatiVe addition of a C-C bond in a bridged biimidazolium ion to Pd(0) is described. The actiVe Pd(0) species appears to be [Pd(PPh3)2Br]-. Simple (unbridged) biimidazolium ions do not form NHC complexes under similar conditions.