The λ5-iodanes such as the Dess-Martin periodinane have square pyramidal geometries with 4 heteroatoms in basal positions and one apical phenyl group.
Madison Square Garden | Times Square | Tiananmen Square protests of 1989 | Trafalgar Square | geometry | Square | Leicester Square | Tiananmen Square | Red Square | A Nightingale Sang in Berkeley Square (song) | A Nightingale Sang in Berkeley Square | molecular biology | Square Enix | Soho Square | Rittenhouse Square | Union Square | Molecular Biology | Harvard Square | Geometry | Tompkins Square Park | Thompson Square | Root mean square | Washington Square Park | Syntagma Square | Square (company) | Russell Square | Molecular biology | Merrion Square | Independence Square | Hanover Square, London |