Inclusion Clathrates

Certain differences in numerical data reported in various publications can be justified to some extent by differences in the analytical methods used. On the other hand, the values given by Lhoste seem to show that the sulphuric acid in nitrocotton could be combined with nitrocellulose molecules less firmly than in an ester group. For instance, it is not out of the question that sulphuric add may be bound with nitrocellulose as an inclusion (clathrate) compound. (Attention was also drawn to this point by Miles [15] in his monograph on cellulose nitrate.)... 

The solid inclusion (clathrate) complex of oxygen with hydroquinone had been prepared twice previously by a published method which involved saturating a solution of hydroquinone in propanol in an autoclave at 70°C with oxygen at 20—150 bar,... 

Adsorption (Chemical Engineering) Catalyst Characterization Catalysis, Homogeneous Inclusion (Clathrate) Compounds Kinetics (Chemistry) Petroleum Refining Pharmaceuticals... 

The skeletal nitrogen atoms in cyclophosphazenes possess a lone pair of electrons and, hence, they have long been viewed as potential donor sites to bind a proton or to form complexes with electron-acceptor molecules. The possibility of formation of anion-cation complexes by release of a halogen ion to a Lewis acid and charge-transfer complexes has also been studied. In addition, some cyclopho-sphazene derivatives form crystalline inclusion clathrates with a variety of guest molecules. Allcock (21, 22) has reviewed these aspects in detail. 

The reactions of N3P3C16 with ethylenediamine and ethanolamine give spirocyclic derivatives (25) and not ansa-compounds. Aliphatic and alicyclic diols also yield spirocyclic derivatives (26, 31). Inclusion clathrates formed by spirocyclic phosphazenes with aryldioxy substituents (2) have been studied by mass spectrometry, broadline NMR, and X-ray techniques (4). Some conclusions on molecular motion in these compounds have been deduced. 

Biomaterials, Synthesis, Eabrication, and Applications Biopolymers Bioreactors Electrophoresis Inclusion (Clathrate) Compounds Liquid Chromatography Mammalian Cell Cul-... 

The number of monomers per turn (n) and the pitch in the axial direction per residue (h) is highly variable in a hollow helical conformation. The value of n is between 2 and 10, whereas h can be near its limit value of 0. The conformation of a P(1 3)-glucan, with n = 5.64 and h = 3.16 A, is shown in Fig. 4.12, b. The helial conformation can be stabilized in various ways. When the helix diameter is large, inclusion (clathrate) compounds can be formed (Fig. 4.13, a cf. 4.4.4.14.3). More extended or stretched chains, with smaller helix diameter. 

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