Chemistry of diphenyltetrafluorophosphazene: Reactions with dilithiated diols |
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| Authors: | Anil J Elias K Muralidharan P Venugopalan |
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| Institution: | a Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110 016, India
b Department of Chemistry, Panjab University, Chandigarh, Punjab, India |
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| Abstract: | Reaction of gem-diphenyltetrafluorophosphazene, 1,1-(C6H5)2]P3N3F4 (1) with LiO(CH2)3OLi resulted in the formation of four products, spiro-{3,3-O(CH2)3O]}1,1-(C6H5)2]P3N3F2 (2), ansa-{3,5-O(CH2)3O]}1,1-(C6H5)2P3N3F2] (3), bridged-1,1-(C6H5)2N3P3F3]O(CH2)3O]1,1-(C6H5)2N3P3F3] (4) and dangling-HO(CH2)3O]1,1-(C6H5)2P3N3F3] (5) derivatives of 1, among which compound 5 was found to be the major product. Reaction of 1 with the dilithiated ferrocene derived diol, FcCH2P(S)(CH2OLi)2 resulted in the formation of two isomers of ansa substituted fluorophosphazenes namely endo-1,1-(C6H5)2]{3,5-FcCH2P(S)(CH2O)2]}P3N3F2 (6) and exo-1,1-(C6H5)2]{3,5-FcCH2P(S)(CH2O)2]}P3N3F2 (7). These were formed along with the spiro isomer 1,1-(C6H5)2]{3,3-FcCH2P(S)(CH2O)2]}P3N3F2 (8) the dangling derivative 1,1-(C6H5)2P3N3F3]OCH2(FcCH2)P(S)CH2OH] (9) and the bridged compound 1,1-(C6H5)2P3N3F3]OCH2(FcCH2)P(S)CH2O]1,1-(C6H5)2P3N3F3] (10). All compounds were separated by column chromatography and characterized by 1H, 31P{1H}, 19F NMR, mass spectra and elemental analysis. The spirocyclic compound 8 was also characterized by X-ray crystallography. |
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| Keywords: | gem-Diphenyltetrafluorophosphazene Spiro Ansa Bridged Dangling Dilithiated diols |
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