The copper(I) and silver(I) complexes of all-Z-tribenzoannulene were sy
nthesized and the structures were determined by X-ray analysis. The trigona
l olefinic cavity of the annulene incorporates copper and silver cation
s to produce stable complexes, whereas the gold(I) complex was unstable, yi
elding a cyclization product via isomerization of the Z-double bonds. (C) 2
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