Add time:08/24/2019         Source:sciencedirect.com

Organoelement derivatives with aluminium—aluminium, gallium—gallium and indium—indium bonds were synthesized for the first time in our group eight years ago. They show a remarkable and unprecedented chemical reactivity and up to now six different types of reaction have been found, which are summarized in this review article: (i) The formation of adducts is observed with sterically less shielded Lewis-bases like H− or Br−. (ii) The treatment with strong reducing agents like the alkali metals or some alkyllithium derivatives yields radical anions with le-M-M π bonds. (iii) Sterically more shielded bases give a deprotonation of the substituent with the formation of heterocycles. (iv) Insertion reactions into the element—element bonds could be realized with atoms, whole molecules or molecular fragments. (v) A metathesis reaction with a ditellurium derivative gives a monomeric organo gallium telluride. (vi) An exchange of two alkyl substituents with the preservation of the element—element bond is observed by the reaction with carboxylic acids.

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