“…Thallation at -25 °C over 15 min and subsequent quench resulted in the formation of monoiodoanisole (75%; ortho/meta/para = 7:0:93). 211 Obviously, the initially formed para isomer rearranges to the IC stabilized ortho isomer (444; Scheme The gallium center is coordinated in a distorted tetrahedral fashion, with a small O-Ga-C angle (96.7°) due to the formation of a six-membered chelate ring. The IC bond between oxygen and gallium (2.038 A) is the first of its kind.…”
“…Thallation at -25 °C over 15 min and subsequent quench resulted in the formation of monoiodoanisole (75%; ortho/meta/para = 7:0:93). 211 Obviously, the initially formed para isomer rearranges to the IC stabilized ortho isomer (444; Scheme The gallium center is coordinated in a distorted tetrahedral fashion, with a small O-Ga-C angle (96.7°) due to the formation of a six-membered chelate ring. The IC bond between oxygen and gallium (2.038 A) is the first of its kind.…”
Anisol (I) liefert bei der Umsetzung mit überschüssigem Thalliumtrifluoracetat (II) das dithallierte Produkt (III), dessen Substitutionspositionen durch Behandlung mit NaJ unter Bildung von (IV) erhärtet werden.
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