Preparation of oligomers containing tetraphenylsilole, acetylene and aromatic groups in the main chain, and incorporation of iron carbonyl

摘要: Abstract Polycarbosilanes with the structure [-SiR2CCZCz.tbnd;C]-n (R2Si = 2,3,4,5-tetraphenyl-1-sila-2,4- cyclopentadiene; Z 1,4-benzene, 4,4′-biphenyl, 9,10-anthracene, 2,7-fluorene, 2,5- and 2,6-pyridine, 6,6′-bipyridine, 2,5-thiophene, 2,6- p-dimethylaminonitrobenzene, 2,6-p-nitroaniline, 2,6-p-nitrophenol, 2,7-fluoren-9-one) were prepared by reaction of 1,1-diethynyl- 2,3,4,5-tetraphenyl-1-sila-2,4-cyclopentadiene appropriate (hetero)aromatic dibromide or diiodide in presence [(PPh3)2PdCl 2] CuI. Exo- endotherms observed initial DSC scans absent repeat scans. The oligomer where p-C6H4 reacted [Fe(CO)5] under UV irradiation to give an containing iron carbonyl fragments attached ca. 30% silole groups.