2008/01/14 by Masaaki Yoshifuji, Anthony J. Arduengo, Shigekazu Ito · 1 citation
Chemistry · #Synthesis and characterization of novel inorganic/organometallic compounds #Organometallic Complex Synthesis and Catalysis #Organophosphorus compounds synthesis #Steric effects #Electron paramagnetic resonance #Singlet state #Paramagnetism #Chemistry #Ground state #Crystallography #Computational chemistry #Stereochemistry #Nuclear magnetic resonance #Condensed matter physics #Physics #Atomic physics #Excited state
paper · doi:10.1080/10426500701734588
openalex publication_date 2008/01/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
Various kinds of stable 1,3-diphosphacyclobutane-2,4-diyls, sterically protected by bulky Mes* (2,4,6-tri-t-butylphenyl) groups, were prepared from Mes*-phosphaethyne. The structures and physical and chemical characters were studied. They are discussed in terms of ground-state singlet biradicals and have been confirmed by spectroscopic analyses, X-ray crystallography and theoretical calculations. EPR studies were also carried out to validate the paramagnetic species related to the 1,3-diphosphacyclobutane-2,4-diyls. The reactions of the biradical species are described including oxidation and sulfurization.