Q307839

C3H4O is a chemical formula that represents each of several actual and hypothetical compounds that differ in structure, but each consist of three atoms of carbon, four of hydrogen, and one of oxygen. The following compounds are among them: {| class="wikitable" |+ !Name !CAS # !Notes !Structure |- |Oxetene, 2H-Oxete | |Synthesized; unstable. Can be made by using light to cyclize acrolein. |frameless |- |2-Oxabicyclo[1.1.0]butane | | |frameless |- |Acrolein, 2-propenal | |Forms from pollutants, burning, metabolism. Cis and trans forms; cis form predominant. |frameless |- |Propa-1,2-dien-1-ol | |Synthesized. Tautomerizes "quantitatively" to acrolein above −50 °C. |frameless |- |Propargyl alcohol or 2-propyn-1-ol | |"Mild, geranium odor" Used in synthesis, as corrosion inhibitor, soil fumigant. |frameless |- |Methoxy ethyne, methoxyacetylene | | |frameless |- |Prop-1-yn-1-ol, 1-propynol | | |frameless |- |Methylketene or 1-propen-1-one | |Synthesized. Intermediate in acrolein pyrolysis. Of astronomical interest. |frameless |- |Methylene oxirane, allene oxide | |Synthesized; predicted (1968) to isomerize "readily" to cyclopropanone. |frameless |- |Cyclopropanone | |Synthesized; unstable due to polymerization and ring-opening. Derivatives used in synthesis, biology. Tautomer of 1-cyclopen-1-ol |frameless |- |Cycloprop-1-en-1-ol, cyclopropene alcohol | |Tautomer of cyclopropanone; Not synthesized |frameless |- |2-Cyclopropenol or 1-hydroxy-2-cyclopropene | |Not synthesized |frameless |- |1,2-Epoxypropene or 2-methyloxirene | |Synthesized; unstable. Product of ionized diazoacetone; isomerizes "rapidly" to methylketene, acrolein, methoxyethyne, and/or 1-propynol. |frameless |}

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