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ChemInform Abstract: Optimizing the Synthesis of Tetratellurafulvalene.

✍ Scribed by D. E. HERR; M. D. MAYS; R. D. MCCULLOUGH; A. B. BAILEY; D. O. COWAN

Publisher
John Wiley and Sons
Year
2010
Weight
30 KB
Volume
28
Category
Article
ISSN
0931-7597

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✦ Synopsis

Optimizing the Synthesis of Tetratellurafulvalene.

-A systematic study of the synthesis of the title Ο€-donor (III) has improved the yield from around 10% to quite repeatable values as high as 26% if tetrabromoethylene is used in the final cyclization step instead of tetrachloroethylene. An improvement is also the use of freshly prepared microcrystalline Te(0), which allows low temp. to maintain throughout the metal exchange/insertion process, thus suppressing byproduct formation. Furthermore, the use of LiCl as an additive to enhance the reactivity of BuLi in these metal exchange reactions also increases yields and reproducibility. -(HERR, D.

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