C4H4N2 Index of chemical compounds with the same molecular formula From Wikipedia, the free encyclopedia The molecular formula C4H4N2 may refer to: Diazines Pyrazine Pyridazine Pyrimidine Succinonitrile, or butanedinitrile This set index page lists chemical structure articles associated with the same molecular formula.If an internal link led you here, you may wish to change the link to point directly to the intended article. More information Related molecular formulas ... Related molecular formulas C4H6N2 C3H2N2 C4H4N2 C5H6N2 C4H2N2 C4H3N C4H5N3 Close Related Articles