Samarium perchlorate

Samarium perchlorate (Sm(llt)oxide in perchloric acid) is a particularly suitable calibration material for checking the wavelength scale of a spectrophotometer over the most commonly used range of 200-500 nm, as it has peaks throughout this region (Optiglass 2015). 

As well as an efficient synthesis of novel 4-(2-phenyl-l,2,3-triazol-4-yl)-3,4-di-hydropyrimidin-2(l//)-(thio)ones (108) from 1,3-dicarbonyl compounds (107), the synthesis of 2-phenyl-l,2,3-triazole-4-carbaldehyde (106) and urea (98) or thiourea (99) under ultrasound irradiation and using samarium perchlorate as a catalyst was described by Liu and Wang (2010). Compared with conventional methods, the main advantages of this methodology are milder conditions, shorter reaction times, and higher yields (Scheme 8.35). 

Diorganotin(IV) complexes with 4//-pyrido[l,2-n]pyrimidin-4-ones 109 (96MI4), complexes of 2-methyl- and 2-methyl-8-nitro-9-hydroxy-4//-pyrido[l,2-n]pyrimidin-4-ones with Ag(I), Cu(II), Ni(II), Co(II), and Mn(II) ions (00MI23), 2,4-dimethyl-9-hydroxypyrido[l, 2-n]pyrimidinium perchlorate and its complexes with prasedynium, neodymium, samarium and europium (00MI24) were characterized by UV spectroscopy. 

Ethyl sulfate Flammable liquids Fluorine Formamide Freon 113 Glycerol Oxidizing materials, water Ammonium nitrate, chromic acid, the halogens, hydrogen peroxide, nitric acid Isolate from everything only lead and nickel resist prolonged attack Iodine, pyridine, sulfur trioxide Aluminum, barium, lithium, samarium, NaK alloy, titanium Acetic anhydride, hypochlorites, chromium(VI) oxide, perchlorates, alkali peroxides, sodium hydride... 

Reductive coupling of carbonyls to alkenes Titanium(IV) chloride-Zinc, 310 of carbonyls to pinacols Titanium(III) chloride, 302 Titanium(IV) chloride-Zinc, 310 of other substrates Samarium(II) iodide, 270 Reductive cyclization 2-(Phenylseleno)acrylonitrile, 244 Tributylgermane, 313 Tributyltin hydride, 316 Triphenyltin hydride, 335 Trityl perchlorate, 339 Reductive hydrolysis (see Hydrolysis) Reductive silylation Chlorotrimethylsilane-Zinc, 82... 

Norephedrine, 200 Organoaluminum reagents, 202 Organotitanium reagents, 213 9-(Phenylseleno)-9-borabicyclo-[3.3.1]nonane, 245 Tin(II) chloride, 298 Titanium(IV) chloride, 304 Trityllithium, 338 Trityl perchlorate, 339 Zinc chloride, 349 By other reactions Chloromethyl ethyl ether, 75 Dibutyltin oxide, 95 Samarium(II) iodide, 270 Tributyltin hydride, 316 Hydroxy amides a-Hydroxy amides... 

The lutetium hahdes (except the fluoride), together with the nitrates, perchlorates, and acetates, are soluble in water. The hydroxide oxide, carbonate, oxalate, and phosphate compotmds are insoluble. Lutetium compounds are all colorless in the solid state and in solution. Due to its closed electronic configuration (4f " ), lutetium has no absorption bands and does not emit radiation. For these reasons it does not have any magnetic or optical importance, see also Cerium Dysprosium Erbium Europium Gadolinium Holmium Lanthanum Neodymium Praseodymium Promethium Samarium Terbium Ytterbium. 

The Brazilian workers have also studied complexes formed with the diamides, diacetamide (Airoldi and Gushikem, 1972), di-n-butyramide (Gushikem et al., 1973), N,N-dimethylacetoacetamide (Perrier and Vicentini, 1974), N,N,N, N -tetramethylmalonamide (Vicentini, 1972 Vicentini et al., 1974a), and N,N,N, N -tetramethyladipamide (Vicentini and Isuyama, 1975). The perchlorates of each of these have the formula R(diamide)4(C 104)3 with the exception of N,N,N, N -tetramethyladipamide for which the complexes of samarium to lutetium have only three molecules of the diamide. In all these complexes the Td symmetry of the perchlorate ion is preserved which implies that it is not coordinated. The complexes with other anions show a reduction in the number of coordinated organic ligands. 

The UV-visible absorption spectra of samarium diiodide in THF and of samar-ium(II) perchlorate in acetonitrile are quite similar. Elaborate discussion of these data may be found in Namy et al. (1981) and Dyke et al. (1972). It appears that for samarium, similar spectra are obtained from the dipositive ions in host lattices. 

Kragten, J. and Decnop-Weever, L.G. (1979) Hydroxide complexes of lanthanides. 11. Samarium(III) in perchlorate medium. Talanta, 26, 1105-1109,... 

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