Synthesis and structural properties of Anhydrous Rare Earth Cinnamates, [RE(cinn)3]

Deacon, Prof. Glen B., Forsyth, Craig M., Junk, Peter C., Hilder, Matthias, Leary, Stuart G., Bromant, Claudia, Pantenburg, Ingo, Meyer, Gerd, Skelton, Brian and White, Allan H. 2007, Synthesis and structural properties of Anhydrous Rare Earth Cinnamates, [RE(cinn)3], Journal of inorganic and general chemistry, vol. 634, no. 1, pp. 91-97, doi: 10.1002/zaac.200700359.

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Title Synthesis and structural properties of Anhydrous Rare Earth Cinnamates, [RE(cinn)3]
Author(s) Deacon, Prof. Glen B.
Forsyth, Craig M.
Junk, Peter C.
Hilder, MatthiasORCID iD for Hilder, Matthias
Leary, Stuart G.
Bromant, Claudia
Pantenburg, Ingo
Meyer, Gerd
Skelton, Brian
White, Allan H.
Journal name Journal of inorganic and general chemistry
Volume number 634
Issue number 1
Start page 91
End page 97
Total pages 7
Publisher Wiley
Place of publication London, Eng.
Publication date 2007
ISSN 1521-3749
Keyword(s) cinnamates
rare earth elements
crystal structures
Summary Anhydrous rare earth tris(cinnamates) [RE(cinn)3] (RE = La–Lu, Y and Sc and cinnH = trans-cinnamic acid) were prepared by metathesis in water and by direct reaction of the metal with cinnamic acid in a 1,2,4,5-tetramethylbenzene flux at ca. 200 °C. X-ray crystal structure determinations and X-ray powder data show that, in the solid state, the larger lanthanoids (La–Dy) form an isomorphous polymeric series consisting of homoleptic nine-coordinate metal centres bonded to three chelating and bridging tridentate cinnamates. The late REIII cinnamate (RE = Dy, Ho–Lu, Y) complexes also form linear one-dimensional polymeric chains with all RE metal atoms being seven-coordinate. The cinnamates are either bound tridentate bridging in a μ-η2:η1 fashion, or μ-η1:η1syn-syn bidentate bridging. A structural break occurs at dysprosium which has been characterised in both crystallographic forms, and gives solely the late RE form when precipitated at 80 °C. ScIII cinnamate was also isolated as an analytically pure precipitate which was, again, found to be anhydrous in nature. A structural change was identified by powder XRD between the late REIII cinnamates and ScIII cinnamate.
Language eng
DOI 10.1002/zaac.200700359
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
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