XI 120.0 d 208 249 17.3 2.08, 083 XI1 107.0 195 224 13.8 2.09, 071 XI11 129.8 100 270 18.2 2.08, 182 XIV 118.4 187 247 16.4 2.08, 088 XV 106.2 151 222 13.8 2: 09, 091 XVI 116.1 214 247 18.6 2.12, 087 XVII 103.0 178 221 17.8 2.15, 100 see Table I1 for structures. Frequency of absorption maxima in cm.?. Wizinger (ref. 6) reported the absorption maximum at 11390 cm.-l (ie, 878 mp) in acetic acid. Essentially no difference was detected in our ...