“…Gol'dfarb et al reported their work on allyl arene isomerization during the hydrogenation of allylbenzene with chloro-tris(tri(phenylphosphine)-rhodium(I) (Wilkinson's complex) or chloro-tris[tri-(2-thienyl)phosphine]-rhodium(I) complexes. 570 Under standard hydrogenation conditions, the total amount of cis-and trans-isomers did not exceed 3%. However, when hydrogenation was conducted on allylbenzene that had been treated with sodium borohydride, a significant amount of isomerized material was observed after 30 min (∼20% trans and <3% cis).…”