Complexes of [L.sub.1] and [L.sub.2], namely, Na[Co[([L.sub.1]).sub.3]], Na[Cu[([L.sub.1]).sub.3]], Na[Ni[([L.sub.1]).sub.3]], [[Cu([L.sub.2])].sub.2], and Na[Co[([L.sub.2]).sub.3]], were separated into their geometric isomers using an adaptation of the method described by Glodjovic et al.
From previous studies, tris-chelate complexes exhibited two possible geometric isomers, namely, the facial cis-cis and meridional cis-trans isomers.
From this viewpoint, UV-Vis spectra of the geometric isomers for Na[Co[([L.sub.1]).sub.3]], [[Cu([L.sub.2])].sub.2], and Na[Co[([L.sub.2]).sub.3]] were obtained.
halys adults and nymphs are, indeed, attracted to methyl (E,E,Z)-2,4,6-decatrienoate and related geometric isomers. Surprisingly, methyl 2,4,6-decatrienoates also attracted significant numbers of the native green stink bug, Acrosternum hilare (Say) (Aldrich et al.
The geometric isomers of methyl 2,4,6-decatrienoate, including pheromones of at least two species of stink bugs.