title: Conformational study of cyclic and acyclic phosphate esters. CNDO/2 calculations of angle strain and torsional strain.
mesh_terms: D008433:Mathematics; D008968:Molecular Conformation; D009712:Nucleotides, Cyclic; D009943:Organophosphorus Compounds; D014961:X-Ray Diffraction
chemical_list: D009712:Nucleotides, Cyclic; D009943:Organophosphorus Compounds