1,4-Diazine Pyrazine C 4 H 4 N 2      Real, long lived, electronically neutral reagent chemical. Gram formula weight (molecular mass) = 80.087 Melting point = 55 °C Boiling point = 115 °C Density = 1.031 g/cm3 Purity = 99 % Solubility in organics = very soluble Molar absorbtivity = 851 at 310 nm Wikipedia Page: Pyrazine is defined with respect to the entities below: The entities below are defined with respect to: Pyrazine 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