Alkane elimination reactions

The method of alkane elimination is a versatile approach for the synthesis of inorganic heterocycles comprised of alternating electropositive and electronegative p-block elements. Typically, this method involves the reaction of a homoleptic alkyl derivative of the more electropositive element with a hydride of the more electronegative element with the elimination of a volatile alkane. 

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Alkane activation by metal atoms by osmium atoms, 273-274 by rhenium atoms, 265-271 by tungsten atoms, 270-272 description, 265 Alkane elimination reactions, processes, 20,22... 

The above-mentioned donor-induced cleavage reactions reveal that tetra-alkylaluminate complexes can behave as metal alkyls in disguise . This bonding feature is in accordance with various alkane elimination reactions observed for homoleptic and heteroleptic tetramethylaluminate complexes. 

The most convenient method for the synthesis of lanthanide dialkyl complexes is the alkane elimination reaction of lanthanide trialkyl complexes with a monoanionic preligand (L H) (Equation 8.15). The monoanionic preligands, which have tunable steric and electronic features, are favored for modifying the stability and reactivity of the complexes. Various bulky substituted cyclopentadienyl [4] and non-cyclopentadienyl derivatives have been used as the spectator ligands. The most common types of monoanionic non-cyclopentadienyl ancillary ligands are summarized in Figure 8.10 [36 8]. 

Fryzuk and coworkers investigated the coordination chemistry of the tridentate diamido-V-heterocyclic carbene ligand 31 with tantalum (V) [72]. Aminoly-sis or alkane elimination reactions with the carbene ligand led to bidentate... 

Protonolysis of the typically polar bond between a group 6 metal and a hydrocarbyl ligand is usually considered to be an unwanted decomposition reaction. When metal—heteroatom bonds are desired, however, selective alkane-elimination reactions can sometimes offer significant advantages, such as ready availability and stability of the protonated source of the desired ligand (such as carboxylic acids, alcohols, or amines) and the absence of inorganic salts as byproducts (the resulting alkane is normally easily removed... 

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