236
CHARLES
Vol. s3
D. HURDA N D RAYMOND D. KIMBROUGH, JR.
+
or about twice that when = 0". In the H-CIIIobserved J 1 , 4 would depend steeply on the relative CIII-H case, two situations may be distinguished : populations of the conformers V-VII. when a formal double bond joins the carbons, 4 can H H\C,*,H H\C,,,CH3 assume only the values 0" and 180', and J i i i , i i r then possesses values of about 10 and 17 c.P.s., H)c=c(H'cITl H H)C=C
