SCHEDULED MAINTENANCE
Reactions of an anionic chelate phosphane/borata-alkene ligand with [Rh(nbd)Cl]2, [Rh(CO)2Cl]2 and [Ir(cod)Cl]2†‡
§a
Xin
Tao,
a
Karel
Škoch,
a
Bernhard
Rieger,
b
Constantin G.
Daniliuc,
a
Matthias C.
Letzel,
a
Gerald
Kehr
a
and
Gerhard
Erker
*a
Abstract
Borata-alkenes can serve as anionic olefin equivalent ligands in transition metal chemistry. A chelate ligand of this type is described and used for metal coordination. Deprotonation of the Mes2P(CH2)2B(C6F5)2 frustrated Lewis pair in the α-CH[B] position gave the methylene-bridged phosphane/borata-alkene anion. It reacted with the [Rh(nbd)Cl] or [Rh(CO)2Cl] dimers to give the respective neutral chelate [P/C![[double bond, length as m-dash]](https://www.rsc.org/images/entities/char_e001.gif)
B][Rh] complexes. The reaction of the [P/CB]− anion with [Ir(cod)Cl]2 proceeded similarly, only that the complex underwent a subsequent oxidative addition reaction at the mesityl substituent. Both the resulting Ir(III)hydride complex 15 and the P/borata-alkene Rh system 12 were used as hydrogenation catalysts. The [P/CB(C6F5)2]Rh(nbd) complex 12 served as a catalyst for arylacetylene polymerization.
![Graphical abstract: Reactions of an anionic chelate phosphane/borata-alkene ligand with [Rh(nbd)Cl]2, [Rh(CO)2Cl]2 and [Ir(cod)Cl]2](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=D0SC02223C&imageInfo.ImageIdentifier.Year=2020)
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