Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Melting points, and chemical

Magnetic quantum number. 19 Magnetic susceptibility mass. 460-463 molar, 461 volume, 460 Maim. J. O.. 70 Map of twist angles, 490 Marcus theory, 571 Mass spectrometry. 239 Maximum multiplicity, 26-27 Mechanisms inner sphere, 565-567 outer sphere. 558-561 of redox reactions. 557-572 of substitution reactions. 545-547. 551-553 Medicinal chemistry, 954-960 Meissner effect, 285 Melting points, and chemical forces. 307-310... [Pg.536]

To synthesize coordination compounds of definite type, the following properties of a solvent should be taken into account, additionally to its capacity to dissolve ligands and metal sources physical properties (mainly dielectric constant, dipole moment, boiling and melting points) and chemical ones (solvation activity, including acid-base characteristics, specific interaction) [208,222-229],... [Pg.190]

Katritzky A.R., Jain, R., Lomaka, A., Petrukhin, R., Maran, U. and Karelson, M. (2001) Perspective on the relationship between melting points and chemical structure. Cryst. Growth Des., 1, 261-265. [Pg.1085]

The combined recycling capacity world wide was about 25,000 metric tons of Ni/Cd batteries per year in 1993, but this was significantly underutilized because of inefficient collection systems and low prices for nickel and cadmium. Both pyrometallurgical and hydrometallurgical methods are used to recycle cadmium from a variety of waste materials in plants in North America, Europe, and Japan [24]. Cadmium is relatively easy to separate from other materials because of its low melting point and chemical activity. [Pg.314]

Pure platinum, owing its high melting point and chemical inertia, is used as a crucible for melting optical glass and optical salt crystals for scientific instruments. [Pg.420]

Titanium diboride was originally developed to make lightweight armor for US and Soviet army tanks. It also has many commercial applications such as nozzles, seals, cutting tools, io dies, wear parts due to its corrosion resistance, and also molten-metal crucibles and elec-trodes. It is used in crucibles due to its high melting point and chemical inertness. and Glasses... [Pg.639]

PVDF polymers are partially fluorinated and melt processible. They have a lower melting point and chemical resistance than perfiuorinated fluoropolymers. Polyvinylidene fluoride resins are, in general, homo-and co-polymers of vinylidene fluoride. PVDF resins are specified by ASTM Method D3222, which also provides procedures or references to other ASTM methods for the measurement of resin properties. Commercial PVDF resins offered by major manufacturers have been listed in Tables 6.10 through 6.14. [Pg.123]

Polymerization of three or more monomers results in further disruption of hydrogen bonding with the consequent reduction in melt point and chemical resistance of the polymers obtained. [Pg.485]

The dispute was in fact resolved in 1896 by Claisen [37], who isolated acetyldiben-zoylmethane as two separate solid forms, each with different melting points and chemical properties (interaction with metallic salts). Claisen correctly diagnosed them as the enol and keto forms having the structures 36b and 36a, respectively. More important still was the observation that, if either the keto or the enol form was heated in a solvent such as alcohol, or fused in the absence of solvents, a mixture was obtained from which both the keto and enol forms could be isolated. As result of this discovery, the pseudomerie/ortisomerie theory about the real existence of the isomers was proven to be correct. Ironically, the term tautomerism came into use to describe the process. In some natural way, according to the early reviews [38-46], tautomerism was considered and it is still considered in most of the cases as an equilibrium between forms coexisting in solution, and was defined as one of the most difficult subjects of experimental science. ... [Pg.11]


See other pages where Melting points, and chemical is mentioned: [Pg.201]    [Pg.201]    [Pg.285]    [Pg.410]    [Pg.211]    [Pg.148]    [Pg.65]    [Pg.230]    [Pg.207]    [Pg.2]    [Pg.381]    [Pg.740]    [Pg.409]    [Pg.427]    [Pg.218]   


SEARCH



© 2024 chempedia.info