Dimethylsulfoxide molecular structure

FIGURE 8.30 Molecular structures of (a) [As(N3)4]-,(b)[Sb(N3)4]-, and (c) [Bi(N3)s(DMSO)] (DMSO = Dimethylsulfoxide). (Molecular structures created from GIF data with hydrogen atoms omitted for clarity.)... 

Figure 22 Molecular structure of host M [cis-3,3 -bis(diphenylhydrox3raiethyl)stilbene]. Host M is able to undergo irrevCTsible isomerization in its inclusion compounds with the following guests acetone, cyclopentanone, y-butyrolactone, dioxane, dimethylsulfoxide, p3niduie, and Al,lV-dimethl3dbnnamide.

These include chloroethylene carbonate (Cl-EC), vinylene carbonate (VC), ethylene sulfite (ES), propylene sulfite (PS), fluoroethylene sulfite (EEC), a-bromo-y-butyrolactone, methyl chloroformate, f-butylene carbonate (f-BC), and 12-crown (12-C-4). In addition to these additives, co-solvents, such as dimethylsulfoxide (DMSO), diethoxymethane (DEM), dimethoxymethane (DMM), and diethoxyethane (DEE) are also effective for stable SEI formation in PC-based solutions. The molecular structures of these additives and co-solvents are summarized in Figure 13. It seems that all these additives give stable SEI layers on graphite surface ... 

It should be noted that the different structures of amylose and amylopectin confer distinctive properties to these polysaccharides (Table II). The linear nature of amylose is responsible for its ability to form complexes with fatty acids, low-molecular-weight alcohols, and iodine these complexes are called clathrates or helical inclusion compounds. This property is the basis for the separation of amylose from amylopectin when starch is solubilized with alkali or with dimethylsulfoxide, amylose can be precipitated by adding 1-butanol and amylopectin remains in solution. 

Alkali lignin, which is prepared by treating the wood with aqueous solutions of sodium hydroxide, in the presence of sodium sulfide (sulfate lignin) is a more appropriate object for structural studies. This polymer is not a polyelectrolyte and has a high molecular mass. In dimethylsulfoxide (DMSO), the macromolecules of sulfate lignin are compact particles, which are characterised by [r ] varying from 7.4 (M = 1.3 x 10 ) to 13.3 cm /g (M = 38.7 X 10 ) and the log [p] versus log M plot with the slope b = 0.15 [45, 46]. 

Structure of dimethylsulfoxide and its orientation by an electric field. Polarized Raman spectroscopy can be employed for investigating the molecular orientation under the field. 

LAG is particularly interesting for mechanochemical synthesis of porous frameworks and inclusion compounds, as the liquid can sometimes become incorporated into the final product as a guest and so direct (template) its structure. One example of mechanochemical formation of a metal-organic host-guest complex is the kneading of copper(II) chloride and dace in the presence of A,A-dimethylsulfoxide (DMSO) or water, which leads to the simultaneous in situ formation of the 1-D coordination polymer host [Cu(dace)Cl2] and molecular inclusion to form inclusion compounds such as [Cu(dace)Cl2] DMSO (Figure 2b). Importantly, the polymeric host itself is not obtainable by neat grinding... 

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