Figure 1
The molecular structures of representative compounds, with displacement ellipsoids drawn at the 30% probability level, selected to show the atom-labelling schemes and the different molecular conformations: (a) and (b) the two independent molecules of the unsubstituted compound (I); (c) molecule 1 of the 3-fluorophenyl compound (III); (d) the major orientation of molecule 2 of the 3-fluorophenyl compound (III); (e) the molecule of the 2-chlorophenyl compound (V); (f) the independent molecular components of the 4-bromophenyl compound (X). |