Vibrational Energy Distributions of Singlet Methylene from Photolyses Ketene, Ketene-d2, Diazomethane, and Diazomethane-d2 at Several Wavelengths. A Chemically Activated Methylcyclobutene Study

Article abstract of DOI:10.1021/j100264a028

The energy distributions of singlet methylene upon reaction with cyclobutane have been determined for methylene from photolysis of ketene and ketene-d₂ at 214 nm, diazomethane at 436, 366, 337, 229 nm, and diazomethane-d₂ at 366 nm.Earlier results for diazomethane photolyses at 436 and 366 nm are extended and reanalyzed in terms of a more recent stepsize determination for collosional deactivation of chemically activated methylcyclobutane.The widths of the singlet methylene energy distributions were found to increase with increasing photon energy and with deuterium substitution.An extensive analysis in terms of a statistical energy partitioning model for photodissociation of ketene and diazomethane is given and discussed.