The β-diketiminato calcium and magnesium complexes, [(BDI)MgnBu] and [(BDI)CaH]2 (BDI = HC{C(Me)NDipp}2; Dipp = 2,6-di-isopropylphenyl), react with ortho-carborane (o-C2B10H12¬) to provide the respective [(BDI)Ae(o-C2B10H11)] (Ae = Mg or Ca) complexes. While the lighter group 2 species is a monomer with magnesium in a distorted trigonal planar environment, the heavier analogue displays a puckered geometry at calcium in the solid state due to Ca‧‧‧H-B intermolecular interactions. These secondary contacts are, however, readily disrupted upon addition of THF to provide the 4-coordinate monomer, [(BDI)Ca(THF)(o-C2B10H11)]. [(BDI)Mg(o-C2B10H11)] was reacted with NHCIPrMCl (NHCIPr = 1,3-bis(isopropyl)imidazol-2-ylidene; M = Cu, Ag, Au) to provide NHCIPrM(o-C2B10H11), rare C-bonded examples of coinage metal derivatives of unsubstituted (o-C2B10H11) and confirming the alkaline earth compounds as viable reagents for the transmetalation of the carboranyl anion.
Original languageEnglish
Pages (from-to)6653-6659
Number of pages7
JournalDalton Transactions
Issue number15
Early online date20 Mar 2024
Publication statusPublished - 21 Apr 2024

Data Availability Statement

See ESI for complete synthetic, and crystallographic details. CCDC codes 2332977–2332982 contain the supplementary crystallographic data for this paper.


Dive into the research topics of 'From alkaline earth to coinage metal carboranyls'. Together they form a unique fingerprint.

Cite this