Beryllium organomagnesiums

Although quite broad, Mg resonances of organomagnesium compounds have been reported. The shift is sensitive to solvation and ligand electronegativity, and resonances for the Schlenk equilibrium species have been reported. Beryllium-9 NMR spectra are more informative than those of In... 

In contrast to organomagnesium see Beryllium Magnesium Organometallic Chemistry) componnds, dialkylzinc derivatives do not disproportionate in coordinated zincate anions and organozinc cations under addition of cryptand... 

In contrast to organomagnesium (see Beryllium Magnesium Organometallic Chemistry) and organolithium... 

Organo -Ca, -Sr and -Ba derivatives are prepared from the metals. With Be, however, the compounds are produced from anhydr BeCl2 and organomagnesium-halide reagents or lithium alkyls. In principle, RBe derivatives can also be formed from Be metal. Thus, a Be mirror disappears by the effect of alkyl radicals, but such reactions cannot be used in practice. Beryllium dialkyls also can be prepared from olefins and Hj with the metal in the presence of small amounts of Br2 or I2, and by the electrolysis of M[A1R3R ] complexes (M = Na, K R = alkyl R = alkyl, alkoxy) using anodes of pure Be. However, laboratory application is limited owing to the lack of detailed information and the need for expensive apparatus. 

Because of the limited volatility of most organomagnesium and -beryllium compounds, there have been fewer mass spectrometric data reported. With Cp2Mg, positive and negative fragment ions from cleavage of the metal-ring bonds are observed. Mass spectra of Me2Be vapor show the presence... 

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