Synthesis and characterization of novel fluorophosphazene-derived cobaltacyclopentadienyl metallacycles: reagents for assembly of aryl-bridged fluorophosphazenes.
作者： Muthiah Senthil Kumar , Shailesh Upreti , Anil J. Elias
DOI: 10.1021/IC0609204
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摘要: Reaction of (beta-phenylethynyl)pentafluorocyclotriphosphazene, F5P3N3C identical with CPh, in situ generated eta5-(MeOC(O)C5H4)Co(PPh3)2 resulted the formation two isomers cobaltacyclopentadienylmetallacycles, (eta(5)-carbomethoxycyclopentadienyl)(triphenylphosphine)-2,5-bis(pentafluorocyclotriphosphazenyl)-3,4-diphenyl cobaltacyclopentadiene (1) and (eta5-carbomethoxycyclopentadienyl)(triphenylphosphine)-2,4-bis(pentafluorocyclotriphosphazenyl)-3,5-diphenyl (2), along sandwich compound [eta5-carbomethoxycyclopentadienyl]-[eta4-1,3-bis(pentafluorocyclotriphosphazenyl)-2,4-diphenylcyclobutadiene]cobalt (3). Formation cobaltacyclopentadienylmetallacycles or cyclobutadienylmetallocene having fluorophosphazene units on vicinal carbon atoms rings was not observed this reaction. 1 diphenylacetylene a novel aryl-bridged fluorophosphazene, 1,4-bis(pentafluorocyclotriphosphazenyl)-2,3,5,6-tetraphenyl benzene (4), conversion cobaltametallacycle to compound, [eta5-(MeOC(O)C5H4]Co(eta4-C4Ph4) (5). phenylacetylene 1,4-bis(pentafluorophosphazenyl)-2,3,5,-triphenyl (6). New compounds 1-4 were structurally characterized. In 1, oriented gauche form respect each other. However, 2 3, they eclipsed other, 4, anti
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