کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1325309 | 977377 | 2007 | 6 صفحه PDF | دانلود رایگان |

The lithium salt of the bis-furyl substituted disilazide anion, Li{i} [{i} = N(SiMe2R)2 where R = 2-methylfuryl] has been examined as a ligand transfer reagent for the synthesis of group 2 (magnesium) and group 13 (aluminium) compounds. Salt metathesis between Li{i} and AlMe2Cl afforded the expected dimethyl species, Al{i}Me2 (1), which was isolated as a colourless oil. In contrast the corresponding aluminium dichloride, synthesized from Li{i} and AlCl3, gave crystalline products as both the THF adduct Al{i}Cl2(THF) (2a) and the base-free derivative, Al{i}Cl2 (2b). The homoleptic magnesium bis(amide) Mg{i}2 (3) was also synthesized. X-ray crystallographic analysis of 2a reveals a four-coordinate distorted tetrahedral metal, in which neither of the furyl-substituents interact with the metal. In contrast, the aluminium in the base-free dichloride 2b is five-coordinate, containing the first structurally characterized example in which the amide binds with a κ1N,O,O′-bonding mode, involving coordination of both furyl-substituents at the N-bound metal.
The bis-furyl substituted disilazide anion, [N(SiMe2R)2]− (R = 2-methylfuryl) has been coordinated to aluminium and magnesium centres. In the case of the aluminium dichloride fragment, both the THF adduct and the base-free complexes have been structurally characterized, the latter of which shows a previously unreported κ1N,O,O′-bonding mode.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 692, Issue 12, 15 May 2007, Pages 2548–2553