Germane, Bromo-

In such combining forms as bromo-, cyano-, chloro-, nitro-, the connective 0 is to be used invariably (with the exception of a few well-established words such as acetamide, cyanamide) as, Chlorbenzol, chlorobenzene Chlor-essigsdure, chloroacetic acid. This usage is by no means universal, but those who can not reconcile themselves to such spellings as bromoacetic should at least avoid the German forms bromphenol, acetphenetidine, etc., and use the connecting o before consonants,... 

Similar conditions as for the formation of PCB s might also lead to the formation of small trace amounts of dioxins. A German Hazardous Substances Ordinance (Chemikalien-Verbotsverordnung) prohibits to place products on the market for which very low limits of dioxin traces are exceeded. Regulated dioxins are those which at least are tetrachloro (or bromo) substituted in 2,3,7,8-position [14],... 

Bromine - the atomic number is 35 and the chemical symbol is Br. The name derives from the Greek bromos for stench or bad odor . It was first prepared by the German chemist Carl Ldwig in 1825 but it was first publically announced in 1826 by Balard and so the discovery is therefore credited to the French chemist and pharmacist Antoine-Jerome Balard. 

Other transition metal anions fail in giving the expected compounds . Germanium halides react more easily but are useless for the preparation of optically active compounds. Indeed, optically active bromo-germanes are not known, and chlorogermanes rapidly racemize in ether or tetrahydrofuran. ... 

Difluorobenzenes are isomerized under gas-phase conditions in the presence of metallosilicates, containing the structure of pentasil zeolites with isomorphic substitution of some silicon atoms by aluminum, gallium, or iron.4 A German patent describes the isomerization of l-bromo-2,4-difluorobenzene to l-bromo-3,5-difluorobenzene in pentasil-type zeolites in an autoclave at 320 C and 25 x 105 Pa for 1 h, giving 29% conversion and 73% selectivity.5... 

SYNS BOREA BROMAZIL 5-BROMO-3-sec-BUTYU6-METHYLURACIL 5-BROMO-6-METHYL-3-(l-METHYLPROPYL)-2,4(lH,3H)-PYRIMIDINEDIONE 5-BROMO-6-METHYL-3-(l-METHYLPROPYL)URACIL 3-sek.BUTYL-5-BROM-6-METHYLURACIL (GERMAN) CYNOGAN DU PONT HERBICIDE 976 EEREX GRANULAR WEED KILLER EEREX WATER SOLUBLE CONCENTRATE WEED KILLER HERBICIDE 976 HYVAR HYVAREX HYVARX ... 

SYNS BROM (GERMAN) BROME (FRENCH) BROMINE, solution (DOT) BROMO (ITALIAN) BROOM (DUTCH)... 

SYNS ACIDE BROMACETIQL E (FRENCH) BROMOACETIC ACID BROMO. CETIC ACID, soUd or solution pOT) BROMOETHANOIC ACID BROMOETHANOIC ACID KYSELINA BROMOCTOVA MONOBROMESSIGSAEURE (GERMAN) MONOBROMOACETICACID TONTU... 

BROM-METHAN (GERMAN) see MHR200 BROMNATRIUM (GERALW) see SFG500 BROMO (ITALIAN) see BMPOOO... 

The dissonant charge pattern for 2,5-hexanedione exhibits a positive (-1-) polarity at one of the a-carbons, as indicated in the acceptor synthon above. Thus, the a-carbon in this synthon requires an inversion of polarity Umpolung in German) from the negative (-) polarity normally associated with a ketone a-carbon. An appropriate substrate (SE) for the acceptor synthon is the electrophilic a-bromo ketone. It should be noted that an enolate ion might act as a base, resulting in deprotonation of an a-halo ketone, a reaction that could lead to the formation of an epoxy ketone Darzens condensation). To circumvent this problem, a weakly basic enamine is used instead of the enolate. 

Molecular Structure and Vibrational IR Spectra of Fluoro, Chloro and Bromo-substituted Methanes, Silanes and Germanes An Ab Anitio Approach (J. S. Kwiatkowski J. Leszczynski)... 

Mellan (Td4) treats the subject in a similar manner but covers more compounds and includes bromo and fluoro compounds. Another book 161), published in France in 1948, covers only the chlorinated hydrocarbons but gives quite an extensive list. McGovern 16S) discusses the commercially important groups of chlorinated hydrocarbons and properties affecting their applications. A detailed discussion of the methods and apparatus used by the German manufacturers of chlorinated solvents is reported by Brundit and Taylor 159), Two earlier reviews 165166) with extensive bibliographies may also be helpful. 

QUECKSILBER (German) (7439-97-6) Violent reaction with alkali metals, aluminum, acetylenic compounds, azides, boron phosphodi iodide (vapor explodes), bromine, 3-bromo-propyne, chlorine, chlorine dioxide, ethylene oxide, lithium, metals, methyl silane (when shaken in air), nitromethane, peroxyformic acid, potassium, propargyl hromide, rubidium, sodium, sodium carbide. Forms sensitive explosive products with acetylene, ammonia (anhydrous), chlorine, picric acid. Increases the explosive sensitivity of methyl azide. Mixtures with hot sulfuric acid can be explosive. Incompatible with calcium, sodium acetylide, nitric acid. Reacts with copper, silver, and many other metals (except iron), forming amalgams. 

Ge(CgH6)3Br Germane, triphenyl-bromo-, 6 74, 76, 77 Ge(C6H5)aH Germane, triphenyl-, 6 76, 77... 

In his German patent [42] on Barbier reactions with allylic halides, Knorr, in 1932, included reactions with crotyl bromide (l-bromo>2-butene)... 

Next, as illustrated in eqn (14.3), under strict Schlenk conditions, a reaction with dibromodithiophene 15 and -BuLi (1.6 M) at 78 °C followed by the addition of the germane derivative GeBr( -octyl)2 generated dithienogermole 16 in 75% yield. After the replacement of bromo groups to Ge, the monomer for Stille coupling was obtained. 

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