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• W2134182305 abstract "[83844-83-1] C64H145BN4O40W12 (MW 3827.87)Tungstoboricferric acid, tetrakis(tetrabutylammonium) salt [214259-61-7] C64H148BFeN4O40W11 (MW 3702.89)Tungstoboricmanganic acid, tetrakis(tetrabutylammonium) salt [546084-10-0] C64H148BMnN4O40W11 (MW 3701.98)(catalysts for oxidation of cycloalkanes with hydrogen peroxide and for epoxidation with hydrogen peroxide)Alternate Names: [N(C4H9)4]4H[BW12O40]·nH2OTungstate(5-), tetracosa-μ-dodecaoxo[μ12-[tetrahydroxyborato(5-)-κO:κO:κO:κO′:κO′:κO′:κO′′:κO′′:κO′′:κO′′′:κO′′′:κO′′′]]dodeca-, tetrakis(N,N,N-tributyl-1-butanaminium) hydrogen;1-butanaminium, N,N,N-tributyl-, hydrogen tetracosa-μ-dodecaoxo[μ12-[tetrahydroxyborato(5-)-κO:κO:κO:κO′:κO′:κO′:κO′′:κO′′:κO′′:κO′′′:κO′′′:κO′′′]]dodecatungstate (4:1:1);tetrakis(tetrabutylammonium) hydrogen dodecatungstoborate(5-);tetrakis(tetrabutylammonium) hydrogen 12-tungstoborate(5-).[N(C4H9)4]4H2[BW11Fe(H2O)O39]·nH2Otungstate(6-), (aquaferrate)tetracosa-μ-oxoundecaoxo[μ12-[tetrahydroxyborato(5-)κO:κO:κO:κO′:κO′:κO′:κO′′:κO′′:κO′′:κO′′′:κO′′′:κO′′′]]undeca-, tetrakis(N,N,N-tributyl-1-butanaminium) dihydrogen;1-butanaminium, N,N,N-tributyl-, hydrogen (aquaferrate)tetracosa-μ-oxoundecaoxo[μ12-[tetrahydroxyborato(5-)-κO:κO:κO:κO′:κO′:κO′:κO′′:κO′′:κO′′:κO′′′:κO′′′:κO′′′]]undecatungstate(6-) (4:2:1);tetrakis(tetrabutylammonium) dihydrogen undecatungstoborateferrate(6-).[N(C4H9)4]4H2[BW11Mn(H2O)O39]·nH2OTungstate(6-), (aquamangnate)tetracosa-μ-oxoundecaoxo[μ12-[tetrahydroxyborato(5-)-κO:κO:κO:κO′:κO′:κO′:κO′′:κO′′:κO′′:κO′′′:κO′′′:κO′′′]]undeca-, tetrakis(N,N,N-tributyl-1-butanaminium) dihydrogen;1-butanaminium, N,N,N-tributyl-, hydrogen (aquamaganate)tetracosa-μ-oxoundecaoxo[μ12-[tetrahydroxyborato(5-)-κO:κO:κO:κO′:κO′:κO′:κO′′:κO′′:κO′′:κO′′′:κO′′′:κO′′′]]undecatungstate(6-) (4:2:1);tetrakis (tetrabutylammonium) dihydrogen undecatungstoboratemanganate(6-).Physical Data: white solid, loss of hydration water up to 100 °C, starts decomposing at 160 °C, totally decomposed to a mixture of oxides at 550 °C. λmax (CH3CN) = 267 nm; 11B NMR: −7.6 ppm (solid state MAS, relative to Na2B4O10·H2O), −18.0 ppm (CH3CN, relative to H3BO3); cyclic voltammetry in acetonitrile: Ep = −1.04 V, −1.53 V vs. Ag/AgCl.1Iron(III)-substituted anion: yellow solid, loss of hydration water up to near 200 °C, starts decomposing at 200 °C, totally decomposed to a mixture of oxides at 650 °C. λmax (CH3CN) = 258 nm.Manganese(III)-substituted anion: orange solid, loss of hydration water up to near 200 °C, starts decomposing at 200 °C, totally decomposed to a mixture of oxides at 650 °C. λmax (CH3CN) = 260, 473, 511(shoulder) nm.All compounds have a typical infrared spectra, with three very strong bands around 950, 900 and 820 cm−1 attributed to W=O and W-O-W stretching vibrations.2-4Solubility: all compounds are soluble in acetonitrile, dichloromethane, 1,2-dichloroethane, dimethylsulfoxide, and N,N-dimethylformamide.Form supplied: not commercially available.Purity: one narrow signal in 11B solid state NMR spectra allows distinction of [BW12O40]5− from other boron-containing anions.8, 9 Other suggested techniques: cyclic voltammetry1 and X-ray powder diffraction, as the compounds are isomorphous, crystallizing with the cubic structure found for related tungstophosphates.10Preparation: precipitation from aqueous solution by addition of [N(C4H9)4]Br to aq [BW12O40]5−, prepared in situ,2, 5 or K5[BW12O40]·nH2O,2 followed by purification and recrystallization.2Iron(III)-substituted anion: preparation of the anion [BW11Fe(H2O)O39]6− in aqueous solution from Na2WO4, H3BO3, and Fe(NO3)33, 4, 6 followed by phase transfer to 1,2-C2H4Cl2 with [N(C4H9)4]Br, and workup of the organic solution.3Manganese(III)-substituted anion: preparation of the anion [BW11Mn(H2O)O39]6− in aqueous solution from KMnO4, Mn(CH3CO2)2, Na2WO4 and H3BO37 followed by phase transfer to 1,2-C2H4Cl2 with [N(C4H9)4]Br, and workup of the organic solution.4Handling, storage and precaution: storage in desiccator, light-protected. No particular safety precautions." @default.
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• W2134182305 date "2005-10-15" @default.
• W2134182305 modified "2023-09-26" @default.
• W2134182305 title "Tungstoboric Acid, Tetrakis(tetrabutylammonium) Salt" @default.
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• W2134182305 doi "https://doi.org/10.1002/047084289x.rn00614" @default.
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