COLLISIONS OF O(D-1) WITH HCL, CL-2, AND COCL2 - TOTAL QUENCHING, CHANNEL SPECIFIC RATE CONSTANTS, AND YIELDS OF CL(P-2(1 2))/

The method of time-resolved laser magnetic resonance was used to monit or Cl atoms produced by the reactions of O(D-1) with HCl, Cl-2, and CO Cl2 at room temperature. For these reactions, the measured relative qu antum yields of spin-orbit excited atoms are [Cl(P-2(1/2)]/([Cl(P-2(1/ 2))] + [Cl(P-2(3/2))]) = (0.10 +/- 0.04), < 0.05, < 0.10, respectively . The rate constants for total removal of O(D-1) by HCl, Cl-2, and COC l2 have been determined to be (1.5 +/- 0.3), (2.5 +/- 0.5) and (2.6 +/ - 0.5), respectively. The reactive rate constants have been determined to be k(2) = (0.94 +/- 0.2), k(4) = (1.9 +/- 0.3), and k(5a) + 2k(5b) = (2.1 +/- 0.27); here k(2), k(4), k(5a), and k(5b) are rate constant s of O(D-1) + HCl --> OH + Cl (2), O(D-1) + Cl-2 --> ClO + Cl (4), and O(D-1) + COCl2 --> CO + ClO + Cl (5a), CO2 + 2Cl (5b), respectively. The rate constants are in units of 10(-10) cm(3)/molecule . s, quoted errors are 2 sigma. (C) 1997 American Institute of Physics.