Abstract: The infrared multiphoton (IRMP) induced photolysis of several oxetanes is examined at low pressures (ca. 100 mtorr) while experimental variables such as laser frequency, laser energy, bath gas, and bath gas pressure are altered. The products of the IRMP induced photolysis of 2-acyl-3-ethoxy-2-methyloxetane, 0x1, are primarily biacetyl and ethyl vinyl ether. When the photolysis is run with the collimated beam of a COz laser (1-3 J ...