LASER-STIMULATED CHEMICAL REACTION OF I2 plus C2H2.

Article abstract of DOI:10.1021/ja00521a040

The laser-initiated chemical reaction of I//2 plus C//2H//2 has been studied by exciting the B-X system of the I//2 molecule at 4880, 5145, and 6040 A, using the output from an Ar** plus laser and a CW dye laser pumped by an Ar** plus laser. At 5145 and 4880 A, the reaction products were mostly C//2H//2I//2 and a trace amount of C//2H//2I//4, which was greater at 4880 A than at 5145 A and satisfactorily correlated with the excited iodine atoms produced at these wavelengths; C//2H//2I//2 was the only product at 6040 A. A mechanism for the reaction of the laser-excited I//2 with the C//2H//2 has been proposed and, on the basis of thermal experiments, has been indicated to be nonthermal.