Unusual coordination mode of organogold(I) compounds: trigonal-planar complexation of gold (I) centers by alkynes
Abstract
Linearily directed donor-stabilized organogold (I) compounds react with the 3-titanopenta-1,4-diyne [(η5-C5H4SiMe3)2 Ti(CCsiMe3)2]T 1 to afford complexes 1·Au(η1-R)[R = Me 3a, C6H2(CF3)3-2,4,6 3b, CCSiMe3 3c] in which the gold (I) centre possesses a trigonal-planar environment formed by two η2-coordinated alkyne units and a η1-bonded organic group R; the X-ray structure analysis of [{(η5-C5H4SiMe3)2 Ti(CCSiMe3)2}-Au{η1-C6H2(CF3)2-2,4,6}] 3b is reported.