The topological features of the SG and the associated representations of the J
B
field, Figs. 7.29 and 7.30, are analogous to those reported for prismane [115] and
outlined above for cubane. A similar structure characterizes the set of vortex- and
saddle-SLs which emerge from a pair of remote (0, 0) branching points, at which
Fig. 7.28 Perspective view of the stagnation graph of the current density vector field in
pentaprismane C 10 H 10 . The uniform external magnetic field B ¼ 3 B z is perpendicular to the
pentagonal faces of the C-cage ( 3 is the unit vector in the direction of the C 5 z axis through the
centre). Green (red) points denote diatropic (paratropic) vortices, or foci; saddle points are blue
204
P. Lazzeretti
B
field, Figs. 7.29 and 7.30, are analogous to those reported for prismane [115] and
outlined above for cubane. A similar structure characterizes the set of vortex- and
saddle-SLs which emerge from a pair of remote (0, 0) branching points, at which
Fig. 7.28 Perspective view of the stagnation graph of the current density vector field in
pentaprismane C 10 H 10 . The uniform external magnetic field B ¼ 3 B z is perpendicular to the
pentagonal faces of the C-cage ( 3 is the unit vector in the direction of the C 5 z axis through the
centre). Green (red) points denote diatropic (paratropic) vortices, or foci; saddle points are blue
204
P. Lazzeretti