Dichloromethane physical properties

Physical properties of the solvent are used to describe polarity scales. These include both bulk properties, such as dielectric constant (relative permittivity), refractive index, latent heat of fusion, and vaporization, and molecular properties, such as dipole moment. A second set of polarity assessments has used measures of the chemical interactions between solvents and convenient reference solutes (see table 3.2). Polarity is a subjective phenomenon. (To a synthetic organic chemist, dichloromethane may be a polar solvent, whereas to an inorganic chemist, who is used to water, liquid ammonia, and concentrated sulfuric acid, dichloromethane has low polarity.)... 

Alkanes have similar chemical properties, hut their physical properties vary with molecular weight and the shape of the molecule. The low polarity of all the bonds in alkanes means that the only intermolecular forces between molecules of alkanes are the weak dipole-dipole forces (see 2.5.1), which are easily overcome. As a result, compared with other functional groups, alkanes have low melting and boihng points, and low solubility in polar solvents, e.g. water, but high solubility in nonpolar solvents, e.g. hexane and dichloromethane. Most cycloalkanes also have low polarity. 

The compound Os3(CO)j j(C5H5N) is very soluble in acetonitrile, dichl-oromethane, acetone, and methanol, and its solutions are stable to air. It is sparingly soluble in hydrocarbons. Its purity can be checked by IR spectroscopy (dichloromethane solution) v(CO)cm 1 2106(w), 2052(s), 2035(vs), 2008 (s), 1976 (m). Other physical properties have been reported.2 The vacuum pyrolysis of this compound provides a high-yield route to the carbido-dianion [Os10C(CO)24]2-.5... 

Some of the observed physical properties of hydrocarbons result from the nonpolar character of the compounds. In general, hydrocarbons do not mix with polar solvents such as water or ethyl alcohol. On the other hand, hydrocarbons mix with relatively nonpolar solvents such as ligroin (a mixture of alkanes), carbon tetrachloride, or dichloromethane. Since the density of most hydrocarbons is less than that of water, they will float. Crude oil and crude oil products (home heating oil and gasoline) are mixtures of hydrocarbons these substances, when spilled on water, spread quickly along the surface because they are insoluble in water. 

The carbon-halogen bond is slightly polar. Overall, however, an alkyl halide is not much more polar than an alkane, so the physical properties of an alkyl halide are not very different from those of an alkane of similar molecular weight. For example, the boiling point of 1-chlorobutane (MW = 92.5 g/mol) is 78°C, whereas that of hexane (MW = 86 g/mol) is 69°C. In general, alkyl halides are insoluble in water. Because of the presence of the more massive halogen atom, the alkyl halide may be more dense than water. For example, when dichloromethane, a common laboratory solvent, and water are mixed, two layers are formed, with dichloromethane as the lower layer. 

Pentacarbonyl(methoxymethylcarbene)chroniiuin(0) is a dull-yellow, crystalline solid mp 34°. It slowly decomposes in the solid state at room temperature in air, but may be stored at 5° for a few days before appreciable decomposition is observed. It is soluble in aliphatic hydrocarbons such as n-pentane, n-hexane, n-heptane, and other common laboratory solvents such as benzene, 1,4-dioxane, tetrahydrofuran, chloroform, dichloromethane, and methanol, and is slightly soluble in ethanol. The infrared spectrum (cyclohexane solution) has v(CO) bands at 2065, 1985, 1965, and 1950 cm-1. The H nmr spectrum in chloroform-d shows the methoxy proton resonance at t6.15 and the methyl proton resonance at t7.70. Other physical properties are reported in the literature.6,7... 

Tertiary phosphine analogs have been prepared from [Rh(NO)2Cl]x.1301 Nitrosyltris(phosphorus trifluoride)rhodium has been prepared from both rhodium(—I) and rhodium(I) complexes (equations 294-296).1297 Their physical properties are listed in Table 90. The triphenylphosphine complex is quite reactive (Scheme 42). Both electronic1312 and 31P NMR spectrometry show the equilibrium constant for the reaction (297) to be of the order of 10-4moldm3 in dichloromethane, benzene1312,1313 or THF,1313 so the reactivity of the complex cannot arise from the facile loss of a... 

It was discovered that the addition of 0.05 parts PEO to the 10 parts base, 1 part curing agent, 1 part PHMS mixture allowed for the best compromise of functionalization, incorporation of PEO, cure times, and physical properties. Additionally, due to the extreme differences in polarity between PEO and PDMS, it was found that addition of 0.5 parts dichloromethane was necessary to facilitate incorporation of PEO into the mixture. 

A V-bis [2-(dimethylamino)ethyl] -N1 V -dimethyl-l, 2-ethanediamine] iodopalla-dium(II) iodide is a yellow, diamagnetic solid that melts with decomposition at 160°. It is not very hygroscopic but should be stored in a moisture-free atmosphere. It is soluble in water, chloroform, acetone, and dichloromethane but insoluble in most other common laboratory solvents. The H nmr spectrum in D20 exhibits a single resonance at 2.68 ppm for the methyl protons (DSS reference). The electronic spectrum for an aqueous solution is characterized by an absorption maximum at 414 nm (e = 625 L mole 1 cm"1). Other physical properties are reported in the literature.5... 

Property data from the literature (1-55,97-108) are given in Table 5-1. Critical volume for dichloromethane is estimated (5). The remaining critical constants have been determined experimentally (1-7). Additional property data such as acentric factor, enthalpy of formation, lower explosion limit in air and solubility in water are also available. The DIPPR (Design Institute for Physical Property Research) project (5) and recent data compilations by Yaws and co-workers (44-55) were consulted extensively in preparing the tabulation. 

PHYSICAL PROPERTIES colorless crystals or white powder chlorine-like odor very sparingly soluble in water sparingly soluble in organic solvents, including acetone, 2-propanol, and dichloromethane MP (218-219°C, 424-426°F) BP (decomposes) DN (unknown) SG (unknown) VD (NA) VP (6.16 x 10 mmHg at 95°F). 

Di-/r-chloro-bis(r -l,5-cyclooctadiene)diriiodium(I) is a yellow-orange, air-stable solid. It can be used directly as obtained for preparative purposes or as a precursor for homogeneous catalysts. It can be recrystallized from dichloromethane-diethyl ether to give orange prisms. The compound is soluble in dichloromethane somewhat less soluble in acetone and insoluble in pentane and diethyl ether. Characteristic strong bands occur in the infrared spectrum at 819,964, and 998 cm (Nujol mull). The cyclooctadiene vinylic protons resonate in the NMR spectrum at t 5.7 and the allylic protons at T 7.4-8.3 (chloroform-d solution). Other physical properties are given by Chatt. ... 

Chemical and Physical Properties The major physical and mechanical properties of poly(caprolactone) are summarized briefly in Table 1.5. Its physical and mechanical properties depend mainly on its molecular weight and crystallinity. In general, aromatic and some polar solvents such as benzene, toluene, cyclohexanone, dichloromethane and 2-nitropropane are good solvents for PCL. Water, alcohols, petroleum ether, diethylether are poor solvents for PCL. PCL can be slightly soluble in acetonitrile, acetone, 2-butanone, ethyl acetate and dimethylformamide. 

High pressure fluid phase equilibrium data of poly (L-lactide) in carbon dioxide and dichloromethane Data extract from Landolt-Bornstein VIII/6D3 Polymers, Polymer Solutions, Physical Properties and their Relations I (Thermodynamic Properties Equilibria of Ternary Polymer Solutions) ... 

PHA polymers are thermoplastics that are soluble in halogenated solvents such as chloroform and dichloromethane. Depending on their chemical composition (homo- or copolymer, the hydroxy fatty acids contained), they differ in their physical properties, eg, ductility and elasticity. PHA can be processed on conventional processing equipment. The processability as well as some mechanical properties like impact strength and flexibility can improve when a monomer/comonomer with longer aliphatic chain is used in polymerisation. One of the commercially available types of PHA is polyhy-droxybutyrate (PHB). PHB is similar to polypropylene in some characteristics like melting temperature, tensile strength, moismre resistance, and odour barrier properties (Pouton and Akhtar, 1996). 

The sulfide (1 1 mmol) was added to a solution of 30% H2O2 (2.4 equiv, 1 g) and p-TsOH (0.07 mmol, 0.012 g), and the mixture was stirred at room temperature for stipulated time (45-206 min). After completion of the reaction (as monitored by TLC), the product was extracted with dichloromethane (3x10 mL) and the combined organic layers were washed with brine (15 mL) and dried over anhydrous sodium sulphate. The crude product, obtained on removal of the solvent under reduced pressure, was purified by short-column chromatography on silica gel with EtOAc/n-hexane (1/2) as eluent. All the products were characterized by IR, NMR, and NMR, and comparison of the spectral data as well as physical properties with those reported for authentic samples (literature cited in this article). 

The orange-red solid is moisture sensitive and should be handled in a glove bag and stored in a Teflon -stoppered flask under nitrogen. For long-term storage, the flask should be kept in a desiccator containing calcium chloride. The solid gives dark red solutions when soluble 1,1,1-trichloroethane (soluble), 1,2-dichloro-ethane (soluble), toluene (low solubility), dichloromethane (insoluble), and o-dichlorobenzene (insoluble). The physical properties have been reviewed. ... 

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