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Bis , hydrate

The aqueous solution is then concentrated to dryness at an outside temperature of 40° to 45°C and at low pressure. The residue, obtained by drying in a vacuum at 40° to 45°C is triturated in a mortar with ethyl ether and, after filtration, is extracted with 3,400 ml boiling absolute ethanol. The ethanol extract is separated from the undissolved part by filtration, cooled and the product which crystallizes by cooling is filtered and dried at 40°C in a vacuum. In that manner the disodium (4,4 -disulfoxy-diphenyl)-(2-pyridyl)-methane bi-hydrate is obtained, which takes the form of a white solid, according to U.S. Patent 3,528,986. [Pg.1233]

Das hygroskopische Natriumboranat kann in geschlossenen GefaBen mehrere Jahre aufbewahrt werden. Das Bis-hydrat (F 36,2-37°) geht beim Erhitzen iiber den Schmelz-punkt in die wasserfreie Verbindung iiber. [Pg.16]

Resorcin2 Eine Losung von 2,3 g (14,2 mMol) Phloroglucin-Bis-hydrat in 100 ml Wasser wird unter Riihren innerhalb 30 Min. zu einer Losung von 3,1 g (82 mMol) Natriumboranat in 20 ml Wasser getropft. Manriihrt 1,5 Stdn., versetzt mit verd. Salzsaure, dampft i. Vak. ein und extrahiert den Riickstand kontinuierlich mit Benzol Ausbeute 1,4 g (90% d.Th.) F 100-107° aus Benzol F 109-110°. [Pg.409]

Eine Losung aus Tetrabutylammoniumchlorid und Kaliumfluorid-Bis-hydrat kann eben-falls verwendet werden. So erhalt man z.B. aus l,3-Diphenyl-3-oxo-propen mit Nitro-methan 1,3-Diphenyl-4-nitro-l-oxo-butan zu 95%4... [Pg.200]

Arulsamy, N. et al., J. Amer. Chem Soc., 2001, 123(44), 10860 Reaction of acetone with nitric oxide in presence of alkali alkoxides gives various diazene A-oxide- A -hydroxylate salts (RN(0)=N0Met, also called diazenediolates), such as the disodium methanebis- or trisodium methanetris- compounds according to nitric oxide pressure. Potassium alkoxides behaved similarly, but lithium only formed a bis- compound. These compounds are explosive. The sodium bis- hydrate shattered a DSC apparatus. [Pg.1864]

Diethyl-selenothiophosphinsaure-Se-ethylesterl06 5,18 g (20 mmol) Natrium-diethyl-selenothiophosphinat-Bis-hydrat werden mit 4,4 g (40 mmol) Ethylbromid und 25 ml 1,4-Dioxan untcr Riihren 2 Stdn. zum RiickfluB erhitzt. Nach Abfiltrieren des Natriumbromids wird das iiberschiissige Ethylbromid und das Losungsmittel i. Vak. abgedampft und der Riickstand destilliert Ausbeute 4,11 g (90%) Sdp. 7170,06 Torr (8 Pa). [Pg.285]

Dimcthylamino-tributylphosphoniono- El, 576 (4-Methoxy-phenyl)-tributylphosphoniono- El, 576 Natrium-dibutyl- E2, 263 Natrium-diethyl- -Bis-hydrat... [Pg.988]

A1 d e h y d Obiges Rohprodukt wird mit 5 0,4 g (0,40 mol) Oxalsaure-Bis-hydrat in 150 ml Wasser 2 Stdn. unter Riickflufi erhitzt. Die leicht triibe Losung wird mit einem geeigneten Losungsmittel (Dichlormethan, Diethylether, Pentan) extrahiert, Ausbeuten 60-90%-... [Pg.474]

Zur Herstellung einer Katalysator-Losung gibt man Hexachloroplatin(IV)-saure und Zinn(II)-chlorid-Bis-hydrat in das betreffende Losungsmittel (z.B. Methanol, Isopropanol, Eisessig). [Pg.64]

Im Bis-hydrat des Lithiumacetats wirkt die Acctat-Gruppe als monodentater Ligand5 ... [Pg.470]

Eisen(H)-formiat als Bis-hydrat ist das Produkt der Umsetzung von Eisen mit Ameisensaure in Gegenwart von Wasser23. [Pg.473]

The dehydration of a thiamine hydrochloride (vitamin Bi) hydrate, commonly referred to as the monohydrate, was investigated by solid state NMR and X-ray diffraction. The hydrate was classified as a nonstoichiometric solvate since the water content depends on the water vapor pressure of the surrounding atmos-... [Pg.275]

Hydro-chlorate d hydrog6ne bi-carbone ( ther hydro-chlorique). 8. Hypo-nitrite d hydrog ne bicarbone hydrate (ether nitrique). 9. Benzoate d hyd. bi-carb. hydrate (ether benzoique). 10. Oxalate d hyd. bi-carb. hydrate ( ther oxalique). II. Bi-carbonate d hyd. bicarb, hydrate (sucre de Cannes). 12. Bi-carbonate d hydr. bi-carb. bi-hydrate (sucre de raisins). 13. Hydrate d hydr. bi-carb. bi-basique ( ther sulfurique). 14. Hydrate d hydr. bi-carb. (alcool). [Pg.344]

The nature of the intermediates and products formed on oxidation of L-ascorbic acid and its 6-benzoate and 6-palmitate by iodine have been investigated by i C-nmr in both D2O and d6-DMSO. In D2O, there was evidence for the formation of the 3,6-hemiketal-hydrate 63 in equilibrium with the bis-hydrate 64 of dehydroascorbic acid. A similar bis-hydrate was formed from the 6-(9-benzoyl deriv.itive in D2O, and this formed a bis-anhydrodimer on standing. In d -DMSO, the 6-O-acyl derivatives formed the 2,3-dione (dehydroascorbate), which formed the bis-hydrate on adding water. 2 Thg hydrogen-ion dependence in the oxidation of L-ascorbic acid by hexacyanoferrate(III) in aqueous ethanol has been investigated the rate law was derived and the... [Pg.177]

Lanthanide p-diketonates are amongst the best smdied rare-earth luminescent complexes [58]. They are brightly luminescent and volatile so that incorporation into various electroluminescent materials is simple. Moreover their photophysical properties are easily tuned by a judicious choice of ancillary ligands. Indeed, conventional synthesis usually yields bis(hydrated) lanthanide tris(P-diketonates), but the two solvent molecules can be substituted by either a fourth diketonate anion or a donor ligand with adequate functionalisation as to provide convenient light harvesting and subsequent energy transfer onto the metal ion. It is noteworthy that not only visible but also near-infrared luminescence [59,60] is efficiently sensitised in lanthanide p-diketonates. In the case of Eu , some ternary complexes have quantum yields up to 85% [8] and the main asset of their luminescent properties is an emission essentially concentrated in the hypersensitive Dq transition... [Pg.144]


See other pages where Bis , hydrate is mentioned: [Pg.212]    [Pg.213]    [Pg.348]    [Pg.488]    [Pg.213]    [Pg.732]    [Pg.732]    [Pg.734]    [Pg.734]    [Pg.263]    [Pg.283]    [Pg.283]    [Pg.1088]    [Pg.102]    [Pg.435]    [Pg.325]    [Pg.342]    [Pg.543]    [Pg.802]    [Pg.319]    [Pg.525]    [Pg.657]    [Pg.720]    [Pg.265]    [Pg.185]   
See also in sourсe #XX -- [ Pg.11 , Pg.19 ]

See also in sourсe #XX -- [ Pg.11 , Pg.19 ]

See also in sourсe #XX -- [ Pg.274 ]




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