Syntheses and molecular structures of new ferrocenylacetylide-bridged binuclear cobalt carbonyl cluster compounds

Author： Suo Quan-Ling Han Li-Min Wang Yi-Bing Ye Jie-Hui Zhu Ning Leng Xue-Bing Sun Jie

ISSN： 0095-8972

Source： Journal of Coordination Chemistry, Vol.57, Iss.17-18, 2004-11, pp. : 1591-1601

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Abstract

The reaction of ferrocenylacetylide compounds with Co 2 (CO) 8 at room temperature affords four complexes bearing ferrocenyl units with approximately tetrahedral (μ-alkyne)dicobalt moieties [R-(C≡C) n -R′] [Co 2 (CO) 6 ] n ′ [R = C 5 H 5 FeC 5 H 4 -C(CH 3 ) 2 -C 5 H 4 FeC 5 H 4 , R′ = H, n = 1, n ′ = 1 ( 1 ); R = C 5 H 5 FeC 5 H 4 [ferrocenyl (Fc)], R′ = -CH=CHCl, n = 1, n′ = 1 ( 2 ); R = Fc, R′ = Fc, n = 2, n ′ = 1 ( 3 ), n ′ = 2 ( 4 )]. The compounds were characterized by elemental analysis, IR, 1 H( 13 C) NMR, MS and single-crystal X-ray diffraction analysis. The X-ray analyses show that coordination of the carbon-carbon triple bond and the dicobalt unit result in the formation of a Co 2 C 2 tetrahedral core, and the substituents on the acetylenic units show a distortion from linearity that reflects this coordination mode.