• Article  

      Chemistry of 4-dicyanomethylene-1,2,6-thiadiazines 

      Koutentis, Panayiotis Andreas; Rees, C. W. (2000)
      The chlorine atoms in 3,5-dichloro-4-dicyanomethylene-1,2,6-thiadiazine 1 are readily displaced by thiophenols in the presence of Hünig's base, the first at -78 °C and the second at 20 °C to give the orange mono- and ...
    • Article  

      Geometrically strained carbenes: Interdependence among geometry, spin multiplicity and reactivity 

      Takahashi, Y.; Nicolaïdes, Andrew N.; Tomioka, H. (2001)
      The singlet and triplet states of cyclobutenylidene 1 and benzocyclobutenylidene 2 have been studied computationally (using ab initio and DFT methods) in order to assess the effect of angle strain on the S-T gap of vinyl- ...
    • Article  

      Reaction of tetracyanoethylene with SCl1 

      Koutentis, Panayiotis Andreas; Rces, C. W. (2000)
      The chloride ion catalysed addition of SCl2 to TCNE gives the 4-dicyanomethylene-l,2,6-thiadiazine 2 (60%) with two minor products (5%) of extensive molecular rearrangement, the pyrimidine 4 and the pyrroloimidazothiadiazine ...