Decalin


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Decalin

 

(also decahydronaphthalene and perhydronaphthalene), C10H18, an alicyclic hydrocarbon; a colorless liquid with a strong odor. It exists in cis- and trans- stereoisomers, which differ in the mutual position of the rings. The more stable trans form has a boiling point of 185.5°C, a melting point of -31.5°C, and a density of 0.87 g/cm3 (20°C). The cis form has a boiling point of 194.6°C, a melting point of -43.2°C, and a density of 0.897 g/cm3 (20°C).

In industry decalin is obtained as a mixture of isomers (usually 60 percent cis and 40 percent trans) by catalytic hydrogenation of naphthalene. It is insoluble in water; has limited solubility in acetic acid, ethanol, and methanol; and is miscible in all proportions with ether and chloroform. Decalin is a good solvent for many organic substances and polymers.

References in periodicals archive ?
The mixture of 80 wt.% decalin and 20wt.% LLDPE was spun into fibers in distilled water (air gap: 10 mm) at room temperature through a spinneret die.
Decalin and tetralin," Industrial and Engineering Chemistry Research, vol.
Structurally, eudesmanolides exhibit a decalin system fused to a [gamma]-lactone ring.
Representative biologically active natural products containing the 2,4-pyrrolidinedione system include tenuazonic acid (Scheme 1) [6, 7], reutericyclin (Scheme 2) with a wide range of pharmacological activities [8-10], the HIV integrace inhibitor equisetin and the tetramic acid-homologues possessing the unsaturated decalin ring system [11], the antibiotic "Magnesidine" (Scheme 3) containing the 5-ethylidene and 3-alkanoyl substitutes with Mg(II) [12, 13], harzianic acid, showing Iron (III)-binding affinity [14, 15], penicillenols (Scheme 4) [16, 17], epicoccamides [18], streptolydigin which inhibits RNA polymerase [19, 20], and the melophlin family of compounds which have shown antimicrobial activity [21].
Perfluorocarbon liquid (PFCL) Decalin (DORC) was used where required for assistance in complete PVR management.
For both bimetallic catalyst series decalin conversion increases as Ir loading and temperature level increase Cu-Ni The decolorization of Orange II was [84] studied under visible light using bimetallic Cu-Ni/Ti[O.sub.2] nanoparticles.
The experiments with nine solvents (benzene, toluene, ethylbenzene, o-xylene, cyclohexane, naphthalene, biphenyl, [alpha]-pinene, and decalin), each with log P values between 2 and 5, confirmed that their concentration in the membrane of up to 0.5 [micro]mol x [mg.sup.-1] phospholipid resulted in an increase in the surface area of the membrane [21].
(1991) were adopted, without the use of decalin and sodium sulfite, utilizing the enzyme thermostable alpha-amylase (Termamyl) in the determinations of the NDF contents in samples of corn silage.
For this reason, this polyethylene is often swollen and dissolved in suitable solvents, like decalin and paraffin, to disentangle the networks.
Measurements of the intrinsic viscosity of polypropylene were made at a temperature of 140[degrees]C measure using decalin, (decahydronaphthalene) as the solvent.
The colloid system that she and her team studies is composed of polymethylmethacrylate (PMMA) particles, which are sterically stabilized and suspended in a decalin and tetralin solvent mixture, then balanced with a bigger polymer, polystyrene (PS), that causes attraction through a depletion interaction.