Tricarbonyl (#eta#~6 arene) chromium(0) complex derived from 8-phenylmenthol chiral auxiliary

摘要

(-)-8-Phenylmenthol was prepared and converted to the corresponding tricarbonyl (#eta#~6-arene) chromium(0) complex. Derivitization as the acrylate ester (1) and subsequent X-ray analysis revealed a 1: 1 mix of s-cis and s-trans acrylate in the unit cell, and geometric proximity to support a through-space #pi# stacking interaction in the case of the s-trans isomer. The dihedral angle between the best planes through the chromium-bond aryl ring and the acrylate group is 19.9 deg for the s-trans isomer and 34.4 deg for the s-cis isomer. Crystal data for (1): C_(22)H_(26)O_5Cr, monoclinic, P2_1 (No. 4), a = 10.269(1), b = 10.482(1), c = 19.787(2), #beta# = 95.85(1), Z = 4, and D_(calc) = 1.32 g cm~(-3).