Synthesis and Structures of Rare Earth 3-(4′-Methylbenzoyl)-propanoate Complexes-New Corrosion Inhibitors

Caspar N. De Bruin-Dickason, Glen B. Deacon, Craig M. Forsyth, Schirin Hanf, Oliver B. Heilmann, Bruce R.W. Hinton, Peter C. Junk, Anthony E. Somers, Yu Qing Tan, David R. Turner

Research output: Contribution to journalArticleResearchpeer-review

Abstract

A series of rare earth 3-(4′-methylbenzoyl)propanoate (mbp-) complexes [RE(mbp)3(H2O)] (RE≤rare earth≤Y, La, Ce, Nd, Ho, Er) have been prepared by either metathesis reactions between the corresponding rare earth chloride and Na(mbp) or protolysis of rare earth acetates by the free acid. Single-crystal X-ray diffraction studies of [RE(mbp)3(H2O)] (RE≤Ce, Nd) and [Ce(mbp)3(dmso)] reveal a 1D carboxylate-bridged polymeric structure in the solid state, featuring 9-coordinate rare earth ions. X-ray powder diffraction patterns of the bulk materials indicates that all of the [RE(mbp)3(H2O)] complexes except RE≤La are isomorphous. Hence, there is no structural change from the complex with RE≤Ce to that with RE≤Er despite the lanthanoid contraction. The 1H NMR spectra of the RE≤Ho or Er complexes in (CD3)2SO show large paramagnetic shifts and broadening of the CH2 resonances, indicating the retention of substantial carboxylate coordination in solution.

Original languageEnglish
Pages (from-to)478-484
Number of pages7
JournalAustralian Journal of Chemistry
Volume70
Issue number5
DOIs
Publication statusPublished - 2017

Cite this

De Bruin-Dickason, Caspar N. ; Deacon, Glen B. ; Forsyth, Craig M. ; Hanf, Schirin ; Heilmann, Oliver B. ; Hinton, Bruce R.W. ; Junk, Peter C. ; Somers, Anthony E. ; Tan, Yu Qing ; Turner, David R. / Synthesis and Structures of Rare Earth 3-(4′-Methylbenzoyl)-propanoate Complexes-New Corrosion Inhibitors. In: Australian Journal of Chemistry. 2017 ; Vol. 70, No. 5. pp. 478-484.
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abstract = "A series of rare earth 3-(4′-methylbenzoyl)propanoate (mbp-) complexes [RE(mbp)3(H2O)] (RE≤rare earth≤Y, La, Ce, Nd, Ho, Er) have been prepared by either metathesis reactions between the corresponding rare earth chloride and Na(mbp) or protolysis of rare earth acetates by the free acid. Single-crystal X-ray diffraction studies of [RE(mbp)3(H2O)] (RE≤Ce, Nd) and [Ce(mbp)3(dmso)] reveal a 1D carboxylate-bridged polymeric structure in the solid state, featuring 9-coordinate rare earth ions. X-ray powder diffraction patterns of the bulk materials indicates that all of the [RE(mbp)3(H2O)] complexes except RE≤La are isomorphous. Hence, there is no structural change from the complex with RE≤Ce to that with RE≤Er despite the lanthanoid contraction. The 1H NMR spectra of the RE≤Ho or Er complexes in (CD3)2SO show large paramagnetic shifts and broadening of the CH2 resonances, indicating the retention of substantial carboxylate coordination in solution.",
author = "{De Bruin-Dickason}, {Caspar N.} and Deacon, {Glen B.} and Forsyth, {Craig M.} and Schirin Hanf and Heilmann, {Oliver B.} and Hinton, {Bruce R.W.} and Junk, {Peter C.} and Somers, {Anthony E.} and Tan, {Yu Qing} and Turner, {David R.}",
year = "2017",
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language = "English",
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pages = "478--484",
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De Bruin-Dickason, CN, Deacon, GB, Forsyth, CM, Hanf, S, Heilmann, OB, Hinton, BRW, Junk, PC, Somers, AE, Tan, YQ & Turner, DR 2017, 'Synthesis and Structures of Rare Earth 3-(4′-Methylbenzoyl)-propanoate Complexes-New Corrosion Inhibitors' Australian Journal of Chemistry, vol. 70, no. 5, pp. 478-484. https://doi.org/10.1071/CH16547

Synthesis and Structures of Rare Earth 3-(4′-Methylbenzoyl)-propanoate Complexes-New Corrosion Inhibitors. / De Bruin-Dickason, Caspar N.; Deacon, Glen B.; Forsyth, Craig M.; Hanf, Schirin; Heilmann, Oliver B.; Hinton, Bruce R.W.; Junk, Peter C.; Somers, Anthony E.; Tan, Yu Qing; Turner, David R.

In: Australian Journal of Chemistry, Vol. 70, No. 5, 2017, p. 478-484.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Synthesis and Structures of Rare Earth 3-(4′-Methylbenzoyl)-propanoate Complexes-New Corrosion Inhibitors

AU - De Bruin-Dickason, Caspar N.

AU - Deacon, Glen B.

AU - Forsyth, Craig M.

AU - Hanf, Schirin

AU - Heilmann, Oliver B.

AU - Hinton, Bruce R.W.

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AU - Tan, Yu Qing

AU - Turner, David R.

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N2 - A series of rare earth 3-(4′-methylbenzoyl)propanoate (mbp-) complexes [RE(mbp)3(H2O)] (RE≤rare earth≤Y, La, Ce, Nd, Ho, Er) have been prepared by either metathesis reactions between the corresponding rare earth chloride and Na(mbp) or protolysis of rare earth acetates by the free acid. Single-crystal X-ray diffraction studies of [RE(mbp)3(H2O)] (RE≤Ce, Nd) and [Ce(mbp)3(dmso)] reveal a 1D carboxylate-bridged polymeric structure in the solid state, featuring 9-coordinate rare earth ions. X-ray powder diffraction patterns of the bulk materials indicates that all of the [RE(mbp)3(H2O)] complexes except RE≤La are isomorphous. Hence, there is no structural change from the complex with RE≤Ce to that with RE≤Er despite the lanthanoid contraction. The 1H NMR spectra of the RE≤Ho or Er complexes in (CD3)2SO show large paramagnetic shifts and broadening of the CH2 resonances, indicating the retention of substantial carboxylate coordination in solution.

AB - A series of rare earth 3-(4′-methylbenzoyl)propanoate (mbp-) complexes [RE(mbp)3(H2O)] (RE≤rare earth≤Y, La, Ce, Nd, Ho, Er) have been prepared by either metathesis reactions between the corresponding rare earth chloride and Na(mbp) or protolysis of rare earth acetates by the free acid. Single-crystal X-ray diffraction studies of [RE(mbp)3(H2O)] (RE≤Ce, Nd) and [Ce(mbp)3(dmso)] reveal a 1D carboxylate-bridged polymeric structure in the solid state, featuring 9-coordinate rare earth ions. X-ray powder diffraction patterns of the bulk materials indicates that all of the [RE(mbp)3(H2O)] complexes except RE≤La are isomorphous. Hence, there is no structural change from the complex with RE≤Ce to that with RE≤Er despite the lanthanoid contraction. The 1H NMR spectra of the RE≤Ho or Er complexes in (CD3)2SO show large paramagnetic shifts and broadening of the CH2 resonances, indicating the retention of substantial carboxylate coordination in solution.

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