
%0 Journal Article
%A Nunn, EE 
%T Ethenyl and ethynyl derivatives of Tricarbonyl(&#951;-cyclobutadiene)iron
%J Australian Journal of Chemistry
%D 1976/11/01
%V 29
%N 11
%P 2549-2552
%K 
%R https://doi.org/10.1071/CH9762549
%U https://www.publish.csiro.au/paper/CH9762549 
%X Tricarbonyl(1-4-&#951;-ethenylcyclobutadiene)iron and a number of its derivatives (3a-d) have been prepared in good yield from tricarbonyl(&#951;- cyclobutadienecarbaldehyde)iron (2) by reaction with methylenetriphenylphosphoranes. Reaction of (E)- and (Z)- tricarbonyl[methyl 2-bromo-3-(&#951;-cyclobutadienyl)propenoate]iron, (3b) and (3c), with potassium t-butoxide gave tricarbonyl[methyl 3- (&#951;- cyclobutadienyl)propynoate]iron (4a) in low yield. Attempts to prepare tricarbonyl(1-4-&#951;-ethynyl-cyclobutadiene)iron (4b) by debromination of tricarbonyl[1-4-&#951;-(2?,2?-dibromoethenyl)cyclobuta-diene]iron(3d) were unsuccessful. 
