| OCR Text |
Show 46 at 276-, 257=, and The ORD 222=m, respectivelYQ '. . pH study on CI brings are curves to light a new w,rinkle 0 The CD and sensiive to pH in the short wavelength regiono The 222=m Cotton effect in the CD spectra appeas to decrease progres- sively as the pH is lqwered; moreover the effect ruling out arguments found for to some of acid decomposition,o great many of the compounds a we is reverible thereby pH e·ffects have been have studied and lead inteesting propoals that will be discuss throughl in Sec- tion 60 The 276= and 257=m Cotton effects at pH 7 and pH 1 ally supeimposableo of This leads us virtu- conclude that the bands are I B2u and Blu origin, respectively \' to are Furthermore th CD data requires ' that the 26=m absorption band be compositeo_ A rough resolution has ben attempted in Figure 4030 Figure 4030 Band shape to be expected from a two=componen banq having intensity ratios of 1:2 which corresponds to the ratio of the intensity of the correspondin,g CD ,bands of CIo |
