I -Octadecene

Obwohl tra/w-Octadecen-(2)-saure zu Octadecanol3 (41% d.Th.) reduziert wird, werden in Alken-(2)-sauren i. a. nur die Carboxy-Gruppen angegriffen (s. S. 155). 

An interesting phenomenon of macromolecular isomorphism was detected in copolymers of a-butene with a-M-hexene, a-M-octene, a-n-decene, a-w-dodecene, and a- -octadecene (<5). In these copolymers isomorphous replacement occurs between the butene units and the methylene sequences of the side groups in both the known modifications I and II of poly-a-butene. 

TABLE 9.3 Selective Hydrogenation of 1-Nitrocyclooctene (I) and l-Nitro-l-octadecene(II) over Pd-Ca i... 

Oligomer formation in the bulk fluid phase is instantaneous relative to oligomer adsorption and reaction to form coke. The oligomer distribution (up to tetramers) is approximated (i.e., lumped) by the trimer, 1-octadecene (O). 

E/O co-polymerization reports with bis(cyclopentadienyl) complexes include ethylene/1-butene, ethylene/l-pentene,254 ethylene/4-methyl-l-pentene,516,522,523 ethylene/1-hexene,229,230,254,446,447,478,481,484,509,512-515, 517-519,522,524-530 ethyiene/1.octene(254,504,505,515,522,531-535 ethyiene/i decene,254,520 ethylene/1-dodecene,254,536 ethylene/1-tetradecene,254,532 ethylene/1-hexadecene,511,512,518,525 ethylene/1-octadecene.532,536... 

Two approaches to the formation of large rings by metathesis have been attempted. The first approach is demonstrated by the synthesis of 9-octadecen-18-olide by Tsuji by the closure of an a,(i>-diene... 

D-Weinsaure-dibutylester wird mit Blei(IV)-acetat in Benzol mit 77-87%iger Ausbeute zu Glyoxylsaure-butylester gespalten53. Aus l,2-Dihydroxy-cis-10-nonadecen erhalt man mit 67%iger Ausbeute cis-9-Octadecen-als i. 

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