ChemInform Abstract: Facile Activation of Arene CH Bonds Contained in Aryloxide Ligation by Tin(IV) Metal Centers.

ChemInform Abstract

Treatment of SnCl₄ (II) with 2 equiv. of the Li-phenoxide (I) leads to formation of the cyclometalated dimer (III). The presence of the new metallacycle is detected by ¹H and ¹³C NMR spectroscopy and is confirmed by an X-ray structure analysis (space group P2₁/n, Z=4). This facile metalation of SnCl₄ contrasts with the extreme stabilities for the derivatives (IV) obtained from the appropriate methyltinchlorides with (I). Thermolysis up to 250 °C fails to show any evidence of cyclometalation. However, a monomeric metalation product (VI) (space group C2; Z=2) is obtained by treating (V) with (I) (no yields given for (IV) and (VI)).