Magnesium tetrakis

Magnesium carbonate pentahydrate Magnesium hydrogen carbonate Magnesium hydroxide carbonate Magnesium hydroxy carbonate Magnesium, tetrakis [carbonato(2-)] dihydroxypenta-... 

Magnesium tetrakis(triphenyIphosphine)palladium (0) jiminocarbonyl chlorides Oxidative coupling of Grignard compds. 2 RMgHal R-... 

A method for generating a perfluoroarylmagnesium compound is the cleavage of a pentafluorophenyl-metal bond by a nucleophile such as ethyltnagnesium bromide As an example, tetrakis(pentafluorophenyl)tin on reaction with ethyl-magnesium bromide gives a series of products, one of which may result from pentafluorophenylmagnesium bromide [27] (equation 7)... 

Chemical Name Tetrakis(hydroxymagnesium)decahydroxydialuminate dihydrate Common Name Magnesium aluminate hydrate monalium hydrate Structural Formula [Mg(DH)]4 [(HD)4AI(DH)(HO)AI(OH)4]-2H2D Chemical Abstracts Registry No. 1317-26-6... 

The peripheral selenodiazole rings of porphyrazine (169) can be opened upon treatment with H2S with the proposed formation of the octaaminoporphyrazine (184), which was not isolated and instead converted into the tetrakis(pyrazino)porphyrazine (185) (Scheme 34) (171). Other heterocycles have been fused on the periphery of porphyrazines, such as l,3-dithiol-2-thione in order to extend the aromatic core (172). Macrocyclization of 4,5-dicyano-l,3-dithiole-2-thione (186) under Linstead conditions in the presence of magnesium butoxide produced the symmetrically substituted tetrakis(l,3-dithiol-2-thiono)porphyrazine (187) (Scheme 35). Due to the low solubility of porphyrazine 181, a consequence of the planar aromatic molecular structure, a full characterization of this compound could not be accomplished. 

Bis[dicarbonyl(cyclopentadienyl)tributylphosphinemolybdenmn]-tetrakis (tetrahydrofuran)magnesium, 3913... 

A, Dimethyl (s)-2-hexenedioate. A 100-roL, one-necked, round-bottomed flask is capped by a septum, swept with dry nitrogen and flame-dried. The flask is charged with methyl acrylate (50 ml, 0.55 mol. Note 1), then anhydrous lithium tetrafluoroborate (9 g, 0.096 mol, Note 2), and finally tetrakis(acetonitrile)palladium tetrafluoroborate (1.33 g, 0.003 mmol. Note 3). The mixture is stirred briefly until homogeneous. It is warmed under nitrogen in a 40°C-o11 bath for 72 hr (Note 4) and then allowed to cool to room temperature. The mixture is added to saturated aqueous sodium bicarbonate (100 mt) and extracted with ether (3 x 50 mt). The combined ether extracts are dried over anhydrous magnesium sulfate, filtered and concentrated to an oil with a rotary evaporator. The residue is distilled through a lO-cm... 

An additional factor was found to influence the rate of reaction in the experiments involving tetrakis ( -mercaptoethylamine) trinickel (II) ion. The addition of nickel chloride retarded the process. Methanol was used as the solvent to demonstrate that the dependence was actually due to the presence of nickel ion and not an ionic strength effect. Magnesium chloride accelerates the rate slightly, while nickel ion greatly retards the rate of reaction. This effect was studied in greater detail, but solubility requirements necessitated the use of a water-methanol mixed solvent. A solution of 5.5M water in methanol was found to be satisfactory to obtain the necessary solubilities of complex and nickel chloride. 

Bis[dicarbonyl(cyclopentadienyl)tributylphosphinemolybdenum] — tetrakis-(tetrahydrofuran)magnesium... 

Bis(dicarbonylcyclopentadienyliron)—bis(tetrahydrofuran)magnesium, 3829 Bis [dicarbonyl(cyclopentadienyl)tributylphosphinemolybdenum] — tetrakis (tetrahydrofuran)magnesium, 3907 Bis(3,4-dichlorobenzenesulfonyl) peroxide, 3439 Bis(2,4-dichlorobenzoyl) peroxide, 3617a... 

Tetrakis(2-methyltetrazol-5-yl)-hexaaza-l, 5-diene, 3008a 5,10,15,20-Tetrakis(2-nitrophenyl)porphine, 3901 Tetrakis(pentafluorophenyl)titanium, 3836 Tetrakis(pyrazole)manganese(II) sulfate, 3532 Tetrakis(pyridine)bis(tetracarbonylcobalt)magnesium, 3861 Tetrakis(thiourea)manganese(II) perchlorate, 1779... 

The macrocycle tetrakis(selenadiazole)porphyrazine and its Mg(n) and Cu(n) complexes were prepared <1999MI371>. Reaction of the 3,4-dicyano-l, 2,5-sclcnodiazole 81 with magnesium propylate in propanol gave Mg(ll) complex with water and acetic acid 203 (Scheme 29). The Mg(ll) complex 203 was transformed to compounds 232 and 233 as shown. 

Quantitative risk assessments have been performed on a variety of flame-retardants used both in upholstered furniture fabric and foam. The National Research Council performed a quantitative risk assessment on 16 chemicals (or chemical classes) identified by the U.S. Consumer Product Safety Commission (CPSC). The results were published in 2000.88 The 16 flame-retardants included in this NRC study were HBCD, deca-BDE, alumina trihydrate, magnesium hydroxide, zinc borate, calcium and zinc molybdates, antimony trioxide, antimony pentoxide and sodium antimonate, ammonium polyphosphates, phosphonic acid, (3- [hydroxymethyl]amino -3-oxopropyl)-dimethylester, organic phosphonates, tris (monochloropropyl) phosphate, tris (l,3-dichloropropyl-2) phosphate, aromatic phosphate plasticisers, tetrakis (hydroxymethyl) hydronium salts, and chlorinated paraffins. The conclusions of the assessment was that the following flame-retardants can be used on residential furniture with minimal risk, even under worst-case assumptions ... 

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