2010
DOI: 10.1002/chem.201001683
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Abstract: The ligand 3,3'-bis(diethylaminomethyl)-1,1'-bi-2-naphthol (binolam) contains an arrayed Brønsted acid-Brønsted base (BABB) system, which is responsible for the original shape of its lanthanide compounds. The solution structure of Pr, Nd and Yb compounds is solved by means of paramagnetic NMR spectroscopy and it is demonstrated that they are substantially isostructural, but with a completely new fold compared to the apparently similar heterobimetallic systems based on 1,1'-bis(2-naphthol) (binol) and alkali ca… Show more

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Cited by 18 publications
(157 citation statements)
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References 58 publications
(157 reference statements)
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“…The PCS pattern for the binaphthol unit is practically superimposable to the one recently found for the complex [8,9] which is suggestive of a similar geometry around Yb. In the present case, however, the D 2 symmetry of the complex prevents the correct application of the simplified McConnell-Robertson equation, which holds only for axial complexes, with a proper axis of order 3 or higher.…”
Section: Resultssupporting
confidence: 49%
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“…The PCS pattern for the binaphthol unit is practically superimposable to the one recently found for the complex [8,9] which is suggestive of a similar geometry around Yb. In the present case, however, the D 2 symmetry of the complex prevents the correct application of the simplified McConnell-Robertson equation, which holds only for axial complexes, with a proper axis of order 3 or higher.…”
Section: Resultssupporting
confidence: 49%
“…This feature indeed characterizes both the heterobimetallic complexes, based on binolate as the ligand, [22][23][24] as well as the more recent BINO-LAM complex. [8,9,25] Upon leaving this solution for a while, we observed an evolution of the NIR-CD spectrum: initially we had just a decrease in the intensity of this Cotton effect, then a negative band at 978 nm started to appear; after 6 h we recorded a bisignated doublet, which eventually converted again into a singlet at 976 nm, but this time negative (and approximately of the same magnitude as the positive peak of the fresh solution). The stationary state is obtained about 18-24 h after preparing the complex.…”
Section: Wwwchemeurjorgmentioning
confidence: 91%
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“…[39,40] Both sys- Figure 1. Left) Chemical structureof( R,R,R,R)-YbDOTMA and right) its solution structure as determined by paramagnetic NMR spectroscopy.…”
Section: Theoretical Backgroundmentioning
confidence: 98%