Composition of Grignard compounds. X. NMR, ir, and molecular association studies of some methylmagnesium alkoxides in diethyl ether, tetrahydrofuran, and benzene

Synthesis and Structural Characterization of a Novel Magnesium β‐Diketonatoalkoxide Complex: A New Precursor for the MOCVD of MgO

“…The structure comprises a tetrahedron of magnesium atoms face-bridged by triply bridging m 3 -methoxide groups, generating a [Mg±O±Me] hetero-cubane core, similar to that in [Mg(OMe)(m 3 -OMe)(MeOH) 1,2 ] 4 [12] and related structures, [13] and analogous to the [Ca±O±Et] core in [Ca(thd)(m 3 -OEt)(EtOH)] 4 . [11] Similar hetero-cubane structures have also been observed in some barium alkoxides, [14] alkyl magnesium alkoxides, [15] and metal±or-ganic compounds such as methyl lithium. [16] Each Mg atom is also coordinated to a thd ligand and a methanol group, leading to a distorted octahedron of oxygen atoms around the Mg, see Figure 2.…”

Alkaline Earth Complexes of a Sterically Demanding Guanidinate Ligand

“…Based on the findings of Mulvey and co‐workers on TMP (TMP = 2,2,6,6‐tetramethylpiperidide) Hauser bases, it is likely that this is a THF‐stabilized dimer, as seen in the formation of [{(TMP)Mg(THF)Cl} 2 ] in THF solution 18. A study on alkylmagnesium alkoxides by Coates and co‐workers revealed that in non‐coordinating solvents such as benzene, the unsolvated tetramers and oligomers (depending on the steric demands of the alkoxide) are preferred, but in coordinating solvents such as THF and diethyl ether, dimeric solvate structures are formed 19,20…”

Grignard-based anionic ring-opening polymerization of propylene oxide activated by triisobutylaluminum

“…In the case of deprotonation, the R group is no more present but this result indicates this splitting still occurs leading to a reactive complex involving halides. Besides, Grignard reagents or even magnesium based compounds are also known to form polynuclear complexes [46][47][48] and can be expected to be formed in these experimental conditions which can explain an incomplete initiation efficiency. Nevertheless, the molar mass control and the chain-end functionalization remains the key features of this system.…”