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Antimony beta-diketonates and alkoxide/beta-diketonates: remarkable formation of a 3,4-dihydro-2H-pyran ring by coupling of 1,1,1,5,5,5-hexafluoro-2,4-pentanedione ligands


Reference:

Horley, G. A., Mahon, M. F., Mazhar, M., Molloy, K. C., Haycock, P. W. and Myers, C. P., 2002. Antimony beta-diketonates and alkoxide/beta-diketonates: remarkable formation of a 3,4-dihydro-2H-pyran ring by coupling of 1,1,1,5,5,5-hexafluoro-2,4-pentanedione ligands. Journal of the Chemical Society: Dalton Transactions

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Abstract

Homoleptic antimony(III) beta-diketonates Sb(thd), (Hthd = 2,2,6,6-tetramethyl-3,5-heptanedione) and Sb(fod), (Hfod = 2,2-dimethyl-6,6,7,7,8,8,8-heptafluoro-3,5-heptanedioneI have been synthesised from Sb(OEt)(3) and three equivalents of the appropriate ligand. Both compounds have been characterised crystallographically and are monomeric with pseudo seven-coordination at antimony, where each ligand chelates the metal in an anisobidentate manner. Attempts to prepare Sb(hfac), (Hhfac = 1,1,1,5,5,5-hexafluoro-2,4-pentanedione) by the same route generated a compound of formula [(EtO)Sb(hfac)(2)](2) but in which the two beta-diketonate ligands have combined to produce a functionalised 3,4-dihydro-2H-pyran ring; the dimer arises from a bridging ethoxy group. Heteroleptic (EtO)Sb(thd)(2) has also been synthesised and crystallographically characterised as a monomeric structure in which the ethoxy group is terminal. In addition, Sb(OEt)(2)(fod) and Sb(OEt)(4)(thd) have been prepared for comparison.

Details

Item Type Articles
CreatorsHorley, G. A., Mahon, M. F., Mazhar, M., Molloy, K. C., Haycock, P. W. and Myers, C. P.
DOI10.1039/b208110e
DepartmentsFaculty of Science > Chemistry
RefereedYes
StatusPublished
ID Code5135
Additional InformationID number: ISI:000179551300017

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