... (7.98kPa), 111.8 °C (5.32kPa), 95 °C (2.67kPa), 78.7 °C (1.33kPa), 63.4 °C ... C.Maleic anhydride (cis-butenedioic anhydride, toxilic anhydride, dihydro-2,5-dioxofuran) is an organic compound with the formula C2H2 ... plants now use n-butane as a feedstock:2 CH3CH2CH2CH3 + 7 O2 → 2 C2H2(CO)2O + 8 H2O[edit] ... ligand for low-valent metal complexes, examples being Pt(PPh3)2(MA) and Fe(CO)4(MA).MA dimerizes ...