The organophosphorus chemistry became the one of the most rapidly developing and very important subdiscipline in the organic and organometallic chemistry. This development is providing exciting chemical structures, efficient metal ligands and biologically important pharmacophores. In the present review we first collected and discussed the fourmembered antiaromatic organic and inorganic compounds, containing phosphorous atom in their ring, which were considered and prepared during the past half a century.
Keywords: phosphorous ring systems, antiaromatic, dichlorocyclodiphospane, cyclic delocalisation, resonance structures
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