Abstract

Laboratory (lab) angular and time-of-flight (TOF) recoil velocity spectra of SnCl product formed by crossing a thermal Sn beam with a Cl 2 nozzle beam have been measured in a molecular beam apparatus equipped with an electron bombardment ionizer—quadrupole mass filter detector unit. Product center of mass (c.m.) recoil angle and energy distributions have been fit to the data by convoluting the c.m. → lab transformation over measured beam speed distributions and the instrumental TOF resolution. The inferred distributions for the Sn + Cl 2 reaction are strikingly similar to those reported for the Li + Cl 2 reaction. In addition, SnBr product was observed from crossed beams of Sn and Br2 which establishes a lower limit for D 0 0 (SnBr) of 131 kJ/mole.

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