NHC-stabilized Parent Arsanylalanes and -gallanes.

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.

SUBMITTER: Weinhart MAK 

PROVIDER: S-EPMC7898810 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature