Methylene hydrocarbons

In addition to its water solubility poly(vinyl pyrrolidone) is soluble in a very wide range of materials, including aliphatic halogenated hydrocarbons (methylene dichloride, chloroform), many monohydric and polyhdric alcohols (methanol, ethanol, ethylene glycol), some ketones (acetyl acetone) and lactones (a-butyrolactone), lower aliphatic acids (glacial acetic acid) and the nitro-paraffins. The polymer is also compatible with a wide range of other synthetic polymers, with gums and with plasticisers. 

Methylene Chloride tdichtaromethane). CAS 75-09-2. As with the other members of the methyl series of chlorinated hydrocarbons, methylene chloride can he produced hy direct chlorination of methane. The usual procedure involves a modification of the simple methane process. The product from Ihe first chlorination passes through aqueous zinc chloride, contacting methanol at about 100 C. Thus. HCl from chlorination is used to displace the alcohol group, producing additional methyl chloride. This is further chlorinated to methylene chloride. Methylene chloride reacts violently in the presence of alkali or alkaline earth metals and will hydrolyze to formaldehyde in the presence of an aqueous base. Alkvlalion reactions occur at both functions, thus di-suhstiiulioiis result. For example. 

Solvents Polish remover contains acetone paint remover, paint thinner, and correction fluids contain toluene (an aromatic hydrocarbon), methylene chloride, and methanol fuel gas contains butane lighter fluid contains butane and isopropane fire extinguishers contain bromochlorodifluo-romethane. 

Water, ethyl acetate, hydrocarbons, methylene chloride... 

Think, for a moment, about the principal role played by the central carbon of a functional group in forming C-C bonds. Then ask how many C-C bonds that particular carbon is capable of forming until it gets rid of all heteroatoms directly substituted on it as well as unsaturations. This number could be anything from a maximum of four, for stable species of carbon, to a minimum of zero in the case of nonactivated hydrocarbon methylenes and methane. Then give this number a name, say Functionality Number, abbreviated as FN. 

Amenable sulfur compounds are reacted with fluorine to produce HF and the chemiluminescence is subsequently measured. Saturated hydrocarbons, methylene chloride, acetonitrile, methanol and carbon tetrachloride give little or no response ... 

Causes of acute chemical hepatitis include exposure to industrial solvents such as halogenated hydrocarbons (methylene chloride, trichloroethylene, and trichloroethane) carbon tetrachloride (only rarely encountered in modem industry) and dimethylformamide, dinitropropane, and di-methylacetamide. The jet and rocket fuel components hydrazine and monomethylhydrazine are also potent hepatotoxins. 

These two new alkaloids can be regarded as ammonia added to the hydrocarbon, (methylene) or (etherin) [C=6]. They may also be regarded as methylic... 

Hydrocarbons, aromatic Hydrocarbons, methyl Hydrocarbons, aliphatic Hydrocarbons, aliphatic Hydrocarbons, methylene... 

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