کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1322337 977203 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Coordination chemistry of perhalogenated cyclopentadienes and alkynes. XXVIII [1] new high-yield synthesis of monobromoferrocene and simplified procedure for the synthesis of pentabromoferrocene. Molecular structures of 1,2,3-tribromoferrocene and 1,2,3,4
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Coordination chemistry of perhalogenated cyclopentadienes and alkynes. XXVIII [1] new high-yield synthesis of monobromoferrocene and simplified procedure for the synthesis of pentabromoferrocene. Molecular structures of 1,2,3-tribromoferrocene and 1,2,3,4
چکیده انگلیسی

Monobromoferrocene (1) was obtained in 95% yield from ferrocene via lithiation with tert-BuLi/KO-tert-Bu and bromination with dibromotetrachloroethane. Starting from 1 mixtures of 1,2-dibromoferrocene (2) and apparently unreacted 1 (ranging from 80:20 to 50:50, depending on the reaction conditions) can be obtained via a lithiation- zincation- bromination sequence. These mixtures can be transferred directly with a tenfold excess of Lithium-tetramethylpiperidinide, followed by bromination with 1,1,2,2-tetrabromoethane to pentabromoferrocene (3), in an overall yield of 36% starting from ferrocene. The molecular structures of 3 and of 1,2,3-tribromoferrocene (4) have been determined by X-Ray diffraction.

A new high-yield synthesis of monobromoferrocene and an optimized one-pot procedure fort the preparation of pentabromoferrocene have been developed. The crystal structure determinations of 1,2,3-tribromoferrocene and pentabromoferrocene are reported.Figure optionsDownload as PowerPoint slideHighlights
► New high-yield synthesis of monobromoferrocene.
► Optimized one-pot procedure for the preparation of pentabromoferrocene.
► Crystal structure determinations of 1,2,3-tribromoferrocene and pentabromoferrocene.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Organometallic Chemistry - Volume 696, Issue 8, 15 April 2011, Pages 1536–1540
نویسندگان
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