Tetrahedron Letters p. 3367 - 3368 (1987)
Update date:2022-08-29
Topics:
Akiba, Kin-ya
Okinaka, Takaaki
Nakatani, Masayuki
Yamamoto, Yohsuke
Triarylbis(phenylethynyl)antimony (V) (1a-1c) were synthesized from triarylantimony dibromide and lithium phenylacetylide.Thermolytic reductive elimination of 1a-1c took place at 110 deg C and the aryl-alkynyl coupling product (3) increased as the aryl group became more electronegative.The result is consistent with the apical-apical coupling from the trigonal bipyramidal structures, which was predicted to be symmetry-allowed by Hoffmann.
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