Moisture-sensitive liquids

TrimethylsiIyloxy-l,3-butadiene [6651-43-Oj M 142.3, b 131"/760mm (mixt of isomers), 49.5"/25mm ( -isomer), d 0.8237, n 1.447. Purified by fractional distn and collecting the fractions with the required H NMR. Store under N2 — it is a flammable and moisture sensitive liquid. [Caseau et al. Bull Soc Chim Fr 16658 7972 Beige Patent 670,769, Chem Abstr 65 5487d 7966.]... 

Caution. Boron trifluoride etherate is a moisture-sensitive liquid. Small amounts of highly toxic HF and flammable chloroethane and diethyl ether are produced during the synthesis. Benzeneacetonitrile is toxic by inhalation and skin absorption. It also an eye irritant. Appropriate precautions must be taken, and an efficient hood must be used. 

Antimony trichloride does not react with dimethylamine to give dimethylaminostibines (compare arsenic trichloride). The more vigorous reagent Me2NLi, however, gives a good yield 1 of tris(dimethylamino)stibine, a colourless, air- and moisture-sensitive liquid (Table 13 equations 29 and 30105). 

Bis[dialkylamino] tellurium dihalides are moisture-sensitive liquids (R = C2HS) or solids. Bis[diethylamino] tellurium difluoride decomposes at 20°. 

Tris[fluoroalkoxy] tellurium fluorides are thermally unstable, moisture-sensitive liquids. 

When a ten-fold molar excess of arsenic trilluoride was dropped onto cis- or trans-boron tris[methoxo(oxo)tetrafluorotellurate(VI)], the mixture refluxed for 30 minutes, and excess arsenic trifluoride removed by distillation, cis- or trans-arsenic tris[methoxo(oxo) tetra-fluorotellurate( VI)] remained as a colorless, moisture-sensitive liquid. The liquids were purified by vacuum-distillation2. 

Dichloroamino tellurium pentafluoride and bromotrimethylsilane formed chloro(tr t-methylsilyl)amino tellurium pentafluoride, as a yellow, moisture-sensitive liquid that decomposes slowly at room temperature to trimethylfluorosilane1. 

The compound (Mc3Si)2N2S is a pale yellow, moisture sensitive liquid. It should be stored under nitrogen, preferably in a flask equipped with Teflon in glass valves (e.g., Rotaflo or J. F. Youngs type) since it slowly dissolves... 

From the remaining residue all volatile products are removed in vacuo at 50°/0.04 mbar followed by extraction with 4 x 100 mL of petroleum (bp 40/60). The petroleum and other volatile materials are stripped off in vacuo (0.04 mbar) at 20-50°. Almost pure (95%) chlorobis-[(dichlorophosphino)methyl]phosphine is left behind. Yield 21-30 g (5.4-7.7%). Chlorobis[(dichlorophosphino)methyl]phosphine is a viscous air-and moisture-sensitive liquid that may be characterized by its NMR spectral data H -NMR 8p = 48.6 ppm 73ipj3c = 52.7 Hz 73.p. 3c = 62.3 Hz... 

The products 3a-3d are obtained as colorless, moisture-sensitive liquids. A radical polymerization inhibitor (e.g., HQME) is added and the products are stored under light exclusion in order to prevent undesired polymerization. 

The water formed was captured in situ using zeolithes to prevent any hydrolytic cleavage of Si-OR"-bonds. The products are viscous, moisture-sensitive liquids, which cannot be distilled without decomposition even in vacuo. Table 1 contains a selection of analytical data. 

Srivastava has synthesized several mixed. .boryl silyl amines from the reaction of aminosilanes with chloroboranes, as shown in reactions (71)— (73). The derivatives are generally moisture-sensitive liquids.540 Noth et al. 

Diethylmethoxyborane is a colorless, extremely moisture-sensitive liquid that can be distilled without decomposition, bp = 88°/760 torr. It forms a constantboiling azeotrope (bp = 54°/760 torr) with an equimolar amount of methanol. The compound must be stored and handled under an inert gas. 

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