The first triple-decker sandwich with a bridging benzene ring

Fixing the Chirality and Trapping the Transition State of Helicene with Atomic Metal Glue

“…For completeness, we have also considered dimers of the already metal-complexed helicenes, analogues of the triple [110] and higher-decker [111] sandwich compounds. The complexation energies of the reactions 2 M- [7]helicene + M!M(M- [7]helicene) 2 (M = Cr, Mo, W) are shown in Table 6.…”

Bis(arene)vanadium complexes. A structural study

“…However, the rather poor quality of the data does not allow an accurate comparison of the bonding parameters, so that the effect, if any, of the anionic charge on the structural parameters of (2) cannot be evaluated. The average V--C distances [2.20 (1) (Duff, Jonas, Goddard, Kraus & Kruger, 1983)], containing the same arene. If compared to the other two structurally characterized bis(arene)vanadium(0) complexes, (1) has V--C distances similar to those in [-V(C6H4F2)2] , 2"19 (2)A (Radonovich et al, 1976) and slightly longer than those in W(f6H6)2, 2" 17 A (Fischer et al, 1963).…”

High‐Electron‐Density C6H6 Units: Stable Ten‐π‐Electron Benzene Complexes

“…To build a molecular wire from ten-p-electron benzene molecules, a means to align several benzene molecules along the C 6 axis is required. If a metal-benzene unit is used as a building block such that multidecker compounds result, [14] there is a simple basic criterion that is to be fulfilled (vide supra). The metal centre (M) must be a four-electron donor.…”