Tetrabrom

Polymorphic transition may occur very rapidly (e.contact with the second form, accelerate the process. [Pg.198]

Analog erhalt man aus l,l,l,3-Tetrabrom-5-phenyl-pentan in 60%iger Ausbeute 1,1,3-Tribrom-5-phenyl-pentan (Kp0,[ 122°). In starker polaren Losungsmitteln (DMF oder HMPT) entstehen Alkene l. [Pg.527]

Die Reduktion von l-Fluor-l,l,2,2-tetrabrom-athan in verdiinnter Salzsaure (geteilte Zelle Blei-Kathode und Platin-Anode) liefert unter vollstandiger Debromierung ncben Fluoracetylen das Acetylen selbst (zusammen 67-75% d.Th.), als Zwischenstufe entsteht 1 -Fluor-1,2-trans-brom-athen, das direkt elektrolysiert ausschlieBlich Acetylen liefert2 ... [Pg.626]

Bis-vicinale Tetrabrom-Verbindungen konnen selektiv unter Mono-debromierung zum vicinalen Dibrom-olefin reduziert werden z. B.5 ... [Pg.626]

Decabrom, Tetrabrom, and Firemaster 680. All of these compounds are amenable to analysis by selected ion monitor glc/ms/comp. However, substantially lower detection limits for TRIS were attained using glc/ecd. Thin-layer chromatography was used for the analysis of Decabrom in some air samples collected during a preliminary study. [Pg.227]

Ethanol zur C-Nitrierung (s. Tab. 37, S. 337 f.), wahrenddessen mit 3-Mcthyl-3-nitro-6-oxo-tetrabrom-l,4-cyclohexadien in Diethylether unter N-Dealkylierung eine N-Nitrie-rung zum N-Methyl-N-nitro-anilin in guten Ausbeuten ablauft3 ... [Pg.338]

Die selektive Nitrierung von Oxidations-anfalligen Hydroxy-arenen, z. B. 1-Hydroxy-naphthalinen, wird bevorzugt mit 3-Methyl- bzw. 3-Ethyl-3-nitro-6-oxo-tetrabrom-1,4-cyclohexadien in Diethylether bei 20° durchgefuhrt1,2 ... [Pg.339]

Bis-ftrimethylsilyloxy]-tris-[tiifluonnethyl]- E2, 877 Brom-cyan-triphenyi- XII/1, 129 Brom-hydroxy-triphcnyl- Xll/1, 127 (l-Brommethyl-pentyl)-tetrabrom- E2, 331 tert.-Butyl-tetrachlor- XII/1, 343 Butyl-tetrafluor- E2, 854... [Pg.1043]

Cyclohexyl-tetrabrom- XII/1, 340 Cyclohcxyl-tetrajod- XII/1. 340 Di-l-adamantyl-trifluor- E2. 863 Dialkylamino-difluor-dihalogen- E2. 842 Dialkyl-trichlor- E2, 866 Diamino-difluor-organo- E2, 859 Diaryl-trichlor- E2, 866 Dibrom-triethyl-... [Pg.1044]

Aluminiumchlorid-Komplex XII/1, 218 Ethyl-tetrabrom- XII/1, 340 Ethyl-tetrachlor- E2, 156,340 Ethyl-tetrafluor- E2, 836, 854, 860, 906 Ethyl-tetrajod- XII/1, 340 Ethylthio-pheny l-tri fl uor-... [Pg.1045]

Phenoxy-tetraphenyl- E2, 886, 887, 893 Phenyl-phenylthio-trifluor- E2, 859 Phenyl-tetrabrom- E2, 309... [Pg.1045]

Potassium Tetrabrom-platinite, K2PtBr4.2HaO, which may be obtained 1 by reduction of the hexabrom-platinate, K2PtBr6, with potassium oxalate solution at 100° C., or by addition of sodium bromide to potassium tetraehlor-platinite.2... [Pg.298]

As obtained in this way, platinic bromide is a dark powder, slightly soluble in water to a reddish brown solution which contains dihy-droxy-tetrabrom-platinic acid, H2PtBr4(OH)2. It is fairly soluble in a mixture of alcohol and water, and very soluble both in alcohol and in ether. On warming, however, these latter solutions become reduced, yielding a deposit of platinum black. Its solution in aqueous hydrogen bromide contains brom-platinic acid. [Pg.298]

It seems very probable that supersilyl sodium reacts with the mentioned bis(supersilyl)tetrabrom-disilane by bromine/sodium exchange. The sodium containing disilane so formed should have a conformation with the overcrowded supersilyl groups in /ra i-positions (Scheme 16). [Pg.385]

Alkyl-4,5,6,7-tetrabrom-l,3-dihydro- -2-oxide IV/la, 299 2-(o>Amino-alkyl)- E6b/1, 484 (Lactam-Red. C,N-Spalt.)... [Pg.43]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...