Diagonally Related s- and p-Block Metals Join Forces: Synthesis and Characterization of Complexes with Covalent Beryllium-Aluminum Bonds.

Author(s) Paparo, A.; Smith, C.D.; Jones, C.
Journal Angew Chem Int Ed Engl
Date Published 2019 Aug 12

Additions of beryllium-halide bonds in the simple beryllium dihalide adducts, [BeX (tmeda)] (X=Br or I, tmeda=N,N,N',N'-tetramethylethylenediamine), across the metal center of a neutral aluminum(I) heterocycle, ( Nacnac=[(DipNCMe) CH] , Dip=2,6-diisopropylphenyl), have yielded the first examples of compounds with beryllium-aluminum bonds, [( Nacnac)(X)Al-Be(X)(tmeda)]. For sake of comparison, isostructural Mg-Al and Zn-Al analogues of these complexes, viz. [( Nacnac)(X)Al-M(X)(tmeda)] (M=Mg or Zn, X=I or Br) have been prepared and structurally characterized. DFT calculations reveal all compounds to have high s-character metal-metal bonds, the polarity of which is consistent with the electronegativities of the metals involved. Preliminary reactivity studies of [( Nacnac)(Br)Al-Be(Br)(tmeda)] are reported.

DOI 10.1002/anie.201906609
ISSN 1521-3773
Citation Angew Chem Int Ed Engl. 2019;58(33):1145911463.

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