For a two-particle (spin 1/2) system, three fundamental forms of complete sets of commuting observables (CSCO) composed of two-body operators σ1ασ2βare give
A new 2D (two-dimensional) coordination polymer, [Fe(μ4-bta)0.5(phen)(OH)]n (1), has been hydrothermally synthesized with FeCl3·6H2O, Na4bta (H4bta = 1,2,4,5-