1,3-Diazine Miazine Pyrimidine C 4 H 4 N 2      Real, long lived, electronically neutral reagent chemical. Gram formula weight (molecular mass) = 80.087 Melting point = 21 °C Boiling point = 123 °C Density = 1.016 g/cm3 Purity = 99 % Solubility in organics = very soluble Molar absorbtivity = 372 at 280 nm Hygroscopic Wikipedia Page: Pyrimidine is defined with respect to the entities below: The entities below are defined with respect to: Pyrimidine 6 Heterocycle (generic) Imine, N-alkyl alkyl (generic) Lobe-HOMO Lewis base (generic) Molecular material (generic) pi-HOMO Lewis base (generic) chemical compound molecule metal molecular science reaction mechanism ionic material acid base geometry reactivity synthesis science knowledge chemistry Lewis