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Figure 7
van't Hoff plot (ln K versus 1/T) for the two orientations in the crystal of N-(4-methylbenzylidene)-4-methylanilines (3). The data of 300, 250, 200, 150 and 90 K are denoted by filled circles and the data of 90 K2 (flash-cooled) by an open circle. K is the ratio of the populations of the major orientation (orientation A) to that of the minor one (orientation B). |