Figure 4-10 Examples of nonanesthetics (i.e., nonimmobilizers). Although these compounds have oil-gas partition coefficients (43.5 for 1,2-dichlorohexafluorocyclobutane; 25 for 2,3-dichlorooctafluorobutane; 10.8 for 1-chloro-1,2,2,2-tetrafluoroethyl chlorodifluoromethyl ether) similar to those of conventional anesthetics (see Table 4-2 ), they completely lack anesthetic properties as determined by minimum alveolar concentration (MAC) measurements.^{[100] [102]}