Nonconjugated ethylenic acids

Some plants contain fatty acids only found in a few species. These are termed unusual fatty acids and are often located in seed oils. However, when found, these bizarre structures frequently represent major components of the individual seed being studied. The unusual fatty acids can be conveniently divided into five groups nonconjugated ethylenic, conjugated ethylenic, acetylenic, substituted, and branched-chain. The structures and distribution of some of these acids are shown in Tables II-IV. For a more complete description the reader is referred to Galliard (1974), Hitchcock (1975), Hitchcock and Nichols (1971), Hopkins (1972), and Smith (1970). 

The acceptor-Lewis acid complex reaets with conjugated donor molecules (e.g., styrene) under quite mild conditions to produce highly alternating structures. However, much stronger conditions are required for nonconjugated donor molecules (ethylene, propylene, vinyl acetate, etc.), where it is necessary to use alkyl aluminum sesquichloride as the Lewis acid at a temperature of 195 K. It has been postulated that a ternary molecular complex is formed... 

New types of metal-containing polymers can be effectively produced 1 construction of polymer supports in the form of gels which, in use, are capable of swelling, insoluble in the reaction medium, but permeable to the molecules, substrate and solvent (23-25). they are based on ethylene-prcpylene rubbers and also ternary copolymers of ethylene, propylene and nonconjugated diene, siloxane rubbers with the radically grafted vinylpyridine, acrylic acid (AAc), methylmethacrylate (MMA), etc. Fu2 her cross-linking of the rubber base allows the syntheses of three-dimensional networks to avoid the dispersion of these particles in the reaction media. MX is bound within these networks. Such polymers were termed mosaic their structure is shown in Fig. 2. It is evident... 

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