151. From alkaline earth to coinage metal carboranyls.
- Author
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Pearce, Kyle G., Morris, Louis J., Robinson, Thomas P., Johnson, Andrew L., Mahon, Mary F., and Hill, Michael S.
- Subjects
ALKALINE earth compounds ,MAGNESIUM compounds ,ALKALINE earth metals ,COPPER ,SOLID geometry ,INTERMOLECULAR interactions - Abstract
The β-diketiminato calcium and magnesium complexes, [(BDI)Mg
n Bu] and [(BDI)CaH]2 (BDI = HC{C(Me)NDipp}2 ; Dipp = 2,6-di-isopropylphenyl), react with ortho-carborane (o-C2 B10 H12 ) to provide the respective [(BDI)Ae(o-C2 B10 H11 )] (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-C2 B10 H11 )]. [(BDI)Mg(o-C2 B10 H11 )] was reacted with [NHCIPr MCl] (NHCIPr = 1,3-bis(isopropyl)imidazol-2-ylidene; M = Cu, Ag, Au) to provide [NHCIPr M(o-C2 B10 H11 )], rare C-bonded examples of coinage metal derivatives of unsubstituted (o-C2 B10 H11 )− and confirming the alkaline earth compounds as viable reagents for the transmetalation of the carboranyl anion. [ABSTRACT FROM AUTHOR]- Published
- 2024
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