Europium tris methanate

Robinson, M.R., O Regan, M.B., and Bazan, GC. (2000) Synthesis, morphology and optoelectronic properties of tris[(W-ethylcarbazolyl)(3, 5 -hexyloxybenzoyl)-methane](phenanthroline)europium. Chemical Communications, 1645-1646. 

Analysis by C-NMR permits quantification of the reaction between phenolic compounds and metfaanal [64,73,232,233,235-237]. In some cases, [tris(l,l,2,2,3,3-heptafluoro-7,7-dimethyl-4,6-octanedione)europium(III)] (Eu(fod)j) is added as shift reagent to shift apart superimposed resonances in the spectra [232]. The C-NMR assignments for phenolic carbons and for carbons in products that are formed during the reaction of the unsubstituted phenol with methanal are summarized in Scheme 39. Similarly, the C-NMR assignments for the starting phenolic compound and several products fiom the reaction between 1,3-benzenediol and methanal are shown in Scheme 40. Nuclear Overhauser enhancement factors must be considered for quantification of any intensity data [232,233]. The nuclear Overhauser enhancement fectors that are used for quantification of the reaction between methanal and phenol or 1,3-benzenediol are given in Scheme 41. 

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