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. 2021 Feb 15;60(7):3806-3811.
doi: 10.1002/anie.202013849. Epub 2020 Dec 15.

NHC-stabilized Parent Arsanylalanes and -gallanes

Michael A K Weinhart  1 , Michael Seidl  1 , Alexey Y Timoshkin  2 , Manfred Scheer  1
Affiliations

NHC-stabilized Parent Arsanylalanes and -gallanes

Michael A K Weinhart et al. Angew Chem Int Ed Engl. .

Abstract

The synthesis and characterization of the unprecedented compounds IDipp⋅E'H2 AsH2 (E'=Al, Ga; IDipp=1,3-bis(2,6-diisopropylphenyl)imidazolin-2-ylidene) are reported, the first monomeric, parent representatives of an arsanylalane and arsanylgallane, respectively, stabilized only by a LB (LB=Lewis Base). They are prepared by a salt metathesis reaction of KAsH2 with IDipp⋅E'H2 Cl (E'=Al, Ga). The H2 -elimination pathway through the reaction of AsH3 with IDipp⋅E'H3 (E'=Al, Ga) was found to be a possible synthetic route with some disadvantages compared to the salt metathesis reaction. The corresponding organo-substituted compounds IDipp⋅GaH2 AsPh2 (1) and IDipp⋅AlH2 AsPh2 (2) were obtained by the reaction of KAsPh2 with IDipp⋅E'H2 Cl (E'=Al, Ga). The novel branched parent compounds IDipp⋅E'H(EH2 )2 (E'=Al, Ga; E=P, As) were synthesized by salt metathesis reactions starting from IDipp⋅E'HCl2 (E'=Al, Ga). Supporting DFT computations give insight into the different synthetic pathways and the stability of the products.

Keywords: Lewis bases; alanes; arsenic; gallanes; group 13/15 compounds.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Examples of dimeric (A) and monomeric arsanyltrielanes (B and C).
Figure 2
Figure 2
Molecular structure of 1 in the solid state; thermal ellipsoids at 50 % probability. [19] Selected bond lengths [Å] and angles [°]: Ga‐As 2.4659(5), Ga‐C1 2.068(3), C1‐Ga‐As 109.33(8), H1‐Ga‐As‐C4 134.4(1).
Figure 3
Figure 3
Molecular structure of 3 in the solid state; thermal ellipsoids at 50 % probability. [19] Selected bond lengths [Å] and angles [°]: Ga‐As 2.4503(12), Ga‐C1 2.0476(17), C1‐Ga‐As 107.99(6).
Figure 4
Figure 4
Molecular structure of 4 in solid state (part 1); thermal ellipsoids at 50 % probability. [19] Selected bond lengths [Å] and angles [°]: Al‐As1 2.399(6), C1‐Al 2.060(2), C1‐Al‐As1 107.83(17)–114.3(2).
Figure 5
Figure 5
Molecular structure of 5 in solid state; thermal ellipsoids at 50 % probability. [19] Selected bond lengths [Å] and angles [°]: Al‐As1 2.451(4), Al‐As2 2.474(3), Al‐C1 2.066(3), As1‐Al‐C1 114.38(10), As2‐Al‐C1 114.24(9).
Figure 6
Figure 6
Molecular structure of 7 in solid state; thermal ellipsoids at 50 % probability. [19] Selected bond lengths [Å] and angles [°]: Ga‐P1 2.3574(9), Ga‐P2 2.3437(10), Ga‐C1 2.075(3), P1‐Ga‐C1 113.68(7), P2‐Ga‐C1 112.38(7).
See this image and copyright information in PMC

References

    1. None
    1. Masuda J. D., Hoshkin A. J., Graham T. W., Beddic C., Fermin M. C., Etkin N., Stephan D. W., Chem. Eur. J. 2006, 12, 8696–8707; - PubMed
    1. Fischer R. A., Weiß J., Angew. Chem. Int. Ed. 1999, 38, 2830–2850; - PubMed
    2. Angew. Chem. 1999, 111, 3002–3022;
    1. Wells R. L., Gladfelter W. L., J. Cluster Sci. 1997, 8, 217–238;
    1. Jones A. C., O'Brien P., in CVD of Compound Semiconductors: Precursor Synthesis Development and Applications, VCH, Weinheim, 1996.