A detergent for cleaning iron monosulfide was formulated with surfactant, diamino-propadiene, citric and EDTA, and its cleaning mechanism was discussed.

Then the paper used the projection operator to structure the normal coordinate component, thus combined 15 normal vibration patterns of propadiene molecule.

Two different symmetric configurations in the electronic structure of propadiene molecule are calculated by adopting PSHONDO SCF full electronic ab initio calculation.