Photochemical reactions of 1-ferrocenyl-4-phenyl-1,3-butadiyne with Fe(CO)5 and CO |
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Authors: | Pradeep Mathur Radhe Shyam Ji Amrendra K Singh |
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Institution: | a Department of Chemistry, Indian Institute of Technology - Bombay, Powai, Bombay 400 076, India b National Single Crystal X-ray Diffraction Facility, Indian Institute of Technology - Bombay, Powai, Bombay 400 076, India |
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Abstract: | Photolysis of a hexane solution containing ironpentacarbonyl, 1-ferrocenyl-4-phenyl-1,3-butadiyne at low temperature yields six new products: Fe(CO)2{η2:η2-PhC CCC(Fc)C(C CPh)C(Fc)Fe(CO)3}-μ-CO] (1), Fe2(CO)6{μ-η1:η1:η2:η2-PhC CCC(Fc)-C(O)-C(Fc)CC CPh}] (2), Fe2(CO)6{μ-η1:η1:η2:η2-FcCC(C C Ph)-C(O)-C(Fc)CC CPh}] (3), Fe2(CO)6{μ-η1:η1:η2:η2-FcC CCC(Fc)-C(O)-C(Fc)CC CPh}] (4), Fe(CO)3{μ-η2: η2-FcCC(C CPh)C(C CPh)C(Fc)}CO] (5) and Fe(CO)3{μ-η2: η2-FcCC(C CPh)C(C CPh)C(Fc)}CO] (6) formed by coupling of acetylenic moieties with CO insertion on metal carbonyl support. In presence of CO, formation of another new product 2,5-bis(ferrocenyl)-3,6-bis(tetracarbonylphenylmaleoyliron)quinone (7) was observed which on further reaction with ferrocenylacetyene gave the quinone, 2,5-bis(ferrocenyl)-3,6-bis(ethynylphenyl)quinone (8). Structures of 1-5 and 8 were established crystallographically. |
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Keywords: | Butadiyne Insertion reaction Iron carbonyl Clusters Crystal structure |
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