Fig. 7
Correspondence between carbon positions in a naphthalene ring. a Correspondence between carbon positions involved with a merge bond in two benzene rings. b Correspondence between carbon positions of a naphthalene ring and two benzene rings in the case of \(T^{sub}(v_{1},v_{2})=_{\underline {C}}T^{sub} (v_{2},v_{1})\). The upper benzene ring v 1 is the parent of the lower benzene ring v 2. \(\overline {x}\) denotes (x mod 6)+1. Blue, red, and green numbers are positions of \(C^{T}_{v_{1}}\), \(C^{T}_{v_{2}}\), and \(C^{T}_{(v_{1},v_{2})}\), respectively. The dashed red line denotes the symmetric axis of Ï• ref