The existence of magnetic-field induced electronic “ring currents” in benzene
and other usaturated planar molecules was the object of a forceful dispute, opposing
Musher [131, 132] to Gaidis and West [133]. Musher restated his point in an
extended review article [140]. At any rate, after nearly half a century, and despite
Fig. 7.42 Magnification of the TV about a C–H bond of acetylene
Fig. 7.43 Display of the vector current density (streamlines on the left, modulus contours in the
centre, and related 3-dimensional view on the right) on a plane containing the bonds of the
acetylene molecule. The applied magnetic field is directed out, and perpendicular to, the plot plane.
Atom positions are marked by crosses. The maximum modulus is 3.54 (cut to 0.25) au, and the
step between two consecutive contour levels is 0.025 au
7 Topology of Quantum Mechanical Current Density …
217
and other usaturated planar molecules was the object of a forceful dispute, opposing
Musher [131, 132] to Gaidis and West [133]. Musher restated his point in an
extended review article [140]. At any rate, after nearly half a century, and despite
Fig. 7.42 Magnification of the TV about a C–H bond of acetylene
Fig. 7.43 Display of the vector current density (streamlines on the left, modulus contours in the
centre, and related 3-dimensional view on the right) on a plane containing the bonds of the
acetylene molecule. The applied magnetic field is directed out, and perpendicular to, the plot plane.
Atom positions are marked by crosses. The maximum modulus is 3.54 (cut to 0.25) au, and the
step between two consecutive contour levels is 0.025 au
7 Topology of Quantum Mechanical Current Density …
217