Y-compound

Epo>y Compounds. Epoxidized soya oil (ESO) is the most widely used epoxy-type additive and is found ia most mixed metal stabilized PVC formulations at 1.0—3.0 phr due to its versatiHty and cost effectiveness. Other usefiil epoxy compounds are epoxidized glycerol monooleate, epoxidized linseed oil, and alkyl esters of epoxidized tall oil fatty acid. 

Ul. Uenaka, R., Nakajima, H., Noguchi, T., Imamura, K Hamagauchi, T Tomita, K Yamada, K., Kuwajima, M Kono, N Tanaka, T and Matsuzawa, Y., Compound heterozygous mutations affecting both hepatic and erythrocyte isozymes of pyruvate kinase. Biochem. Biophys. Res. Commun. 208,991-998 (1995). 

If X X = Y compounds of structure A have a center of chirality and the R-and S-enantiomers should be optically active. Since in Lewis add-base reactions exchange equilibria are often expected to be formed via transition state B, it seems quite difficult to synthesize one pure enantiomeric form ... 

Fig. 2a. Pulmonary and lymph node burdens of inhaled radioactive particles for Class W and Class Y compounds (no radioactive decay) as projected from the TGLD clearance model.

Fig. 8. Summary of pulmonary retention of l44Ce in Beagle dogs after inhalation of labeled chloride, oxide, and aluminosilicate particles (heavy lines) as compared to Class W and Y compounds of l44Ce (light lines). These include radioactive decay.

Table 13—Time integrated, uCe activity in lung, liver, and skeleton after inhalation of class D, W, and Y compounds and after inhalation of chloride, oxide and fused aluminosilicate particles, FAP, by beagles 1...

A similar procedure was also used by Villars to find atomic property expressions which could be used to distinguish the crystal structures of intermetallic compounds 182 sets of tabulated physical properties and calculated atomic properties were considered. These were combined, for binary phases, according to the modulus sums, differences and ratios. The best separations were obtained by using three-dimensional maps, which, for a binary AVB,., x [Pg.309]

The Li(C2H4)(N2)y compounds with y = 1-3 were very unstable and required large excesses of nitrogen to be observed. As discussed above, the authors showed that the... 

Z) is provided in Section II. Section III deals with the rntyor reactions of 3-acyl-l,5-dihydro-4-hydroxy-2-pyrrolones (Y), compounds representing a wide variety of natural substances. Finally, Section IV presents an overview on the chemistry of the actual tetramic acids (X). 

The commercial product of the dinitration melts at about 140°, and consists principally of the a- and /3-compounds. The nitration of naphthalene at very low temperatures,44 —50° to —60°,. gives good yields of the y- compound, and some of this material is undoubtedly present in the ordinary product. 

It might have been expected that the reactions could lead to vanadium ylides instead of the pentaalkyls, but this was obviously not the case. From the literature it is not clear whether or not true vanadium (Y) compounds have been used as starting materials in at least some of the reactions to warrant the appropriate oxidation state. The problems associated with the vanadium pentahalides (except for the fluoride) and other VX6 compounds may well be the reason for the difficulties arising in the syntheses. If these difficulties can be overcome, there should be a chance for a successful preparative procedure according to one of the following pathways ... 

Except for the Dess-Martin periodane, which has been widely employed as a selective oxidant in various synthetic protocols (97MI1, 02CRY2523), organoiodine(Y) compounds have received much less attention than their iodine(III) counterparts for organic synthesis. However, recent publications in this area indicate that this is likely to change. 

A) y-Compounds X 0 Neutral species (D20, CCl4 or CDCl3) Cation (TFA or D2S04) ... 

For that series it was shown that, by variation of X and Y, compounds could be prepared that were disposed at points along the 12-13-14, manifold. Each compound was analysed by NMR spectroscopy with the Si NMR chemical shift giving a good indication of the extent of pentacoordination at silicon and the C NMR spectrum of the aromatic ring being responsive to the degree of 0" Si bond making. 

At Tc, infrared spectra also exhibit various phonon anomalies. Fig. 4.8-24 demonstrates this for a Cu/Ga substituted 123-superconductor (a) and a Tl-based superconductor (b). The Y compound clearly shows spontaneous softening of the mode at T,., whereas in the spectrum of the T1 superconductor the mode at 305 cm bleaches below Tc (110 K), while another mode at lower energy gains oscillator strength. Interestingly, IR-active phonons do not only soften but may also harden as a consequence of phase transition. This led to the conclusion that there are two different gap energies, one around 30 meV ( 5/cbT,.) for electrons in the a, b plane, and one around 10 meV (s 1,7 b7 c) in c-direction. 

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