Neutral low-​coordinate palladium(0) complexes, featuring electron rich phosphine ligands, are key intermediates in myriad cross-​coupling reactions. Strong donor ligands, such as P(tBu)​<sub>3</sub> promote low coordination and also favor oxidative addition. Here, we describe the synthesis and reactivity of a dianionic 14-​electron palladium(0) species, supported by phosphines appended with carba-​closo-​dodecaborate substituents. In contrast to neutral dicoordinate Pd(0) complexes this molecule undegoes the oxidative addition addition of aryl-chlorides instantly at room temperature. A comparitive study between the rate of oxidative addition with this system and isoelectronic neutral species will be discussed.

Reactivity of a dianionic 14 -electron Pd(0) complex supported by charged carboranyl phosphine ligands

249th National Meeting (2015)

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