کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1321669 | 1499828 | 2016 | 10 صفحه PDF | دانلود رایگان |
• A bromonium derivative of COSAN was characterized by NMR spectra for the first time.
• Reactions of 8,8′-μ-Br-3,3′-Co(1,2-C2B9H10)2 with arenes and bases were investigated.
• A series of [8-Br-8′-X-3,3′-Co(1,2-C2B9H10)2] derivatives was synthesized.
The generation of Br-bridged complex of cobalt bis(1,2-dicarbollide) (8,8′-μ-Br-3,3′-Co(1,2-C2B9H10)2) and its reactions with arenes and some nucleophiles were studied. The complex 8,8′-μ-Br-3,3′-Co(1,2-C2B9H10)2 can be generated in situ via the action of 8-monobromo derivative of cobalt bis(1,2-dicarbollide) and AlX3 (X = Cl, Br) in different aromatic solvents. This unstable complex was characterized by 11B NMR spectroscopy for the first time. Its reactions with an appropriate arene led to [8-Br-8′-Ar-3,3′-Co(1,2-C2B9H10)2]- species even without addition of an activating Lewis base. Reactions of 8,8′-μ-Br-3,3′-Co(1,2-C2B9H10)2 with S- and N-nucleophiles (thioxane, morpholine) in benzene afforded the corresponding charge-compensated derivatives (8-Br-8′-Y-3,3′-Co(1,2-C2B9H10)2) as well as [8-Br-8′-Ar-3,3′-Co(1,2-C2B9H10)2]- species.
Generation of Br-bridged complex of cobalt bis(1,2-dicarbollide) (8,8′-μ-Br-3,3′-Co(1,2-C2B9H10)2) and its reactions with arenes and nucleophiles were investigated.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 818, 1 September 2016, Pages 58–67