Aromatic propellenes. Part 3. NMR, X-ray crystallography and semi-empirical calculations on the conformational isomerism of 1,2,4,5-tetrakis (pyrazol-1′-yl)-3,6-bis(3″,5″-dimethylpyrazol-1′-yl) benzene

1. Foces-Foces, C.
2. Fernández-Castaño, C.
3. Claramunt, R.M.
4. Escolástico, C.
5. Elguero, J.