Detail of "15522-71-1"

MSDS Download
CAS Number:
15522-71-1
Name:
4-Hepten-3-one, 5-hydroxy-2,2,6,6-tetramethyl-, europium(3+) salt, (4E)-
Molecular Structure:
Formula:
C₃₃H₅₇EuO₆
Molecular Weight:
701.77
Synonyms:
Europium,tris(2,2,6,6-tetramethyl-3,5-heptanedionato)- (7CI,8CI);Europium, tris(2,2,6,6-tetramethyl-3,5-heptanedionato-O,O')-,(OC-6-11)-;Europium, tris(2,2,6,6-tetramethyl-3,5-heptanedionato-kO,kO')-, (OC-6-11)- (9CI);3,5-Heptanedione,2,2,6,6-tetramethyl-, europium complex;(Dipivalomethanato)europium(III);Europium tris(2,2,6,6-tetramethyl-3,5-heptanedionate);Europium(III)2,2,6,6-tetramethylheptane-3,5-dione;NSC 147451;Tris(2,2,6,6-tetramethyl-3,5-heptanedionato)europium;Tris(dipivalomethanato)europium;Tris(dipivaloylmethanato)europium;
EINECS:
239-565-5
Melting Point:
187-191 °C
Risk Codes:
36/37/38
Safety:
26-36/37/39 Details

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TRIS(2,2,6,6-TETRAMETHYL-3,5-HEPTANEDIONATO)EUROPIUM(III)

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NMR studies on conformation and molecular motion of poly(methyl methacrylate) in solution: NMR studies on conformation and molecular motion of poly(methyl methacrylate) in solution. Inoue, Yoshio; Konno, Tetsuo (Dep. Polym. Chem., Tokyo Inst. Technol., Tokyo, Japan). Makromol. Chem., 179(5), 1311-24 (English) 1978. CODEN: MACEAK. ISSN: 0025-116X. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) The NMR shift reagent, tris(dipivalomethanato)europium(III) [15522-71-1], is applied to the 1H NMR measurement of isotactic [25188-98-1] and syndiotactic poly(Me methacrylate) [25188-97-0] at 25-80° in benzene (C6D6), chloroform (CDCl3), and CCl4. The variations, as a function of temp., of the 13C spin-lattice relaxation times are detd. for individual C of the polymers in benzene and chloroform solns. The conformation of the polymer mols. depends on the stereochem. configuration and the nature of the solvent. The mol. motion depends both the conformation and the configuration.

Carbon-13 NMR spectroscopy of poly(b-substituted b-propiolactone)s: Carbon-13 NMR spectroscopy of poly(b-substituted b-propiolactone)s. Tacticity recognition in 1,5-substituted polymer system and stereospecific contact of shift reagent. Iida, Makoto; Hayase, Shuji; Araki, Takeo (Fac. Sci., Osaka Univ., Toyonaka, Japan). Macromolecules, 11(3), 490-3 (English) 1978. CODEN: MAMOBX. ISSN: 0024-9297. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) 13C NMR was effective for observing the dyad tacticity in b-alkyl-b-propiolactone polymers. Addn. of a shift reagent, tris(dipivaloylmethanato)europium [15522-71-1], was helpful for the polymers whose tacticity sepn. in the 13C NMR was insufficient. The lanthanide-induced shift occurred stereospecifically, resulting in a stronger low-field shift for meso-dyad signals than for racemic dyad signals. The stereospecificity may be caused by small differences in the pseudocontact angle of the Eu ion with the meso- and racemic-dyad units in the polymer chain. In the polyesters the C atoms sensitive to tacticity recognition include the carbonyl C and main-chain CH2 C atoms, whereas the methine C is insensitive.