کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1340708 | 979747 | 2008 | 7 صفحه PDF | دانلود رایگان |
The influence of the steric repulsion of ligands on the structure of alkylaluminium and alkylgallium 2,3-dimethylbutane-2,3-diolates (pinacolates) has been studied. Reaction of Me3Al and pinacol afforded the compound Me5Al3[OC(CH3)2C(CH3)2O]2 (1) possessing two diolate ligands. The treatment of pinacol with the more sterically hindered tBu3Al resulted in the formation of aluminium tripinacolate tBu3Al3[OC(CH3)2C(CH3)2O]3 (2) as the only product. In contrast, the reaction of the less reactive tBu3Ga with pinacol stopped at the stage of the compound tBu3Ga2[OC(CH3)3C(CH3)2O] [OC(CH3)3C(CH3)2OH] (3), which is an intermediate product of the reaction of 1,2-diols with group 13 trialkyls. Compounds 1, 2 and 3 were crystallographically characterised.
The treatment of pinacol with tBu3Al resulted in the formation of aluminium tripinacolate tBu3Al3[OC(CH3)2C(CH3)2O]3 (2) as the only product. In contrast, the reaction of the less reactive tBu3Ga with pinacol stopped at the stage of the compound tBu3Ga2[OC(CH3)3C(CH3)2O] [OC(CH3)3C(CH3)2OH] (3), which is an intermediate product of the reaction of 1,2-diols with group 13 trialkyls.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 27, Issue 3, 26 February 2008, Pages 962–968