Magnesium dihalide

The second route (Scheme 1) is a redistribution reaction, in fact the Schlenk equilibrium. This route may be used in the reverse direction for the preparation of pure diorganomagnesium compounds from organomagnesium halides. Addition of a ligand, usually dioxane, that forms an insoluble complex with magnesium dihalide, shifts the Schlenk equilibrium completely to the left side and allows isolation of pure diorganomagnesium compounds from the remaining solution. ... [Pg.56]

The asymmetric inducting effect of the chiral pyranic ring placed outside of the six centers of the chair transition state has to be noted. In the present case, magnesium dihalide seems to play a crucial role in terms of stereocontrol as an efficient tool to fix a defined... [Pg.491]

MgX, generic representation of a magnesium dihalide (such as magnesium chloride, MgCip... [Pg.121]

V. STRUCTURES OF MAGNESIUM DIHALIDE AND OTHER MAGNESIUM COMPOUNDS... [Pg.139]

Although magnesium dihalides are not organomagnesium compounds, they do exist in all Grignard solutions and, therefore, are included in this review. They also give valuable... [Pg.139]

Table 4 Relevant Bond Lengths (A) and Bond Angies from the Crystal Structures of Magnesium Dihalide Compounds...

V. Structures of Magnesium Dihalide and other Magnesium Compounds 139... [Pg.715]

Magnesium dihalides form complexes with certain donors [e.g., dioxane, (CH3)2NCH2CH2N(CH3)2TMEDA], which may precipitate from solution and shift the equilibrium to the right, yielding the diorganyls ... [Pg.272]

In this ketone synthesis, (1) the Grignard reagent reacts with cadmium chloride to yield an organocadmium compound, plus a magnesium dihalide. (2) The organocadmium is then reacted with an acid chloride to yield a ketone plus cadmium chloride. [Pg.504]

Semicrystalline polyolefin blends were prepared by mixing two different random copolymers of propene with 4-lOC alpha-olefin at a ratio from 1 3-1 1. The first copolymer contained 1-10 wt% of C4 io alpha-olefin (1-butene, 1-pentene, 1-hexene, 1-octene, and 4-methyl-1-pentene), whereas the second 15 0 wt% of the same comonomer. The mixing was carried out in reactors, polymerizing the monomers in the presence of stereospecific catalysts supports on active magnesium dihalides, in at least two sequential stages. The resulting R-TPOs showed limited... [Pg.1688]

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