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Unknown Propenylbenzene 1 -Methyl-2-ethylbenzene Propenylbenzene Comment z = -2 z = -2 z = -2 z = o z = o z = -4 z = -4 m / e 96, Z = -2 z = o z = -4 z = -4 z = -2 z = -4 z = f 2 z = -2 , z = -4 z = -4 z = -4 z = -2 z = -2 z = -2 m / e 110, Z = -2 z = o m / e 104 z = o z = o z = o z = o m / e 118 m / e 120 z = -2 m / e 120 m / e 120 z = -4 m / e 118 m,/e 120 m / e 118

or branch point was the only difference between the pre dieted and the correct structure. In one case (No. 6) the molecular formula was incorrect and hence there was no chance of a correct structure prediction. However, in this case the results were still useful, because the main structure (a substituted benzene ring) was correctly predicted even though the substituted groups were incorrect. In the final case (No. 5) the computational results were so contradictory as to make very little sense. Hence, no structure prediction was attempted in this case. It should be noted that even trometry. The peak identified as m-6P50 is bis[m-(m-phenoxyphenoxy)phenyl]ether. SUMMARYThe short capillary column is a highly versatile column applicable to a wide variety of assignments. It is particularly (27) W.

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