89596-86-1Relevant academic research and scientific papers
Iron carbonyl complexes of dimethyl cyclooctatetraene-1,8-dicarboxylate
Kerber, Robert C.,Glasser, Dean,Luck, Barbara
, p. 840 - 845 (2008/10/08)
Reaction of dimethyl cyclooctatetraene-1,8-dicarboxylate with iron carbonyls yields, in addition to the known 3-6-η4-Fe(CO)3 complex, two new Fe2(CO)6 complexes. One is a yellow 1-4-η4,5-8-η4-bis[Fe(CO)3] complex, with the iron tricarbonyl groups probably trans. The other is a red compound with a 1,5,6-η3,2-4-η3-Fe2(CO) 6(Fe-Fe) structure. The X-ray crystallographic structure of the latter compound shows an iron-iron distance of 2.771 A? and indicates a strong interaction of the Cl-bound ester group with the C-Fe σ-bond. The red Fe2(CO)6(Fe-Fe) complex is the most stable, probably as a consequence of that interaction. None of the compounds exhibits haptotropy at room temperature, in contrast to the parent hydrocarbon complexes.
