Investigation of the Magnetic Moments of S2, Se2, Te2, Se6, and Se5by the Sternndash;Gerlach Magnetic Deflection Method

摘要

An apparatus consisting of a Knudsen effusion cell, collimator, inhomogeneoushyphen;field magnet, and quadrupole mass spectrometer has been applied to investigation of the fraction of S2, Se2, Te2, Se6, and Se5molecules that show a magnetic moment. The expected high concentration of paramagnetic S2molecules was found, but the concentration of paramagnetic Se2and Te2molecules at 1000deg;K was less than the 10percnt; detection limit. The concentration of paramagnetic Se6and Se5at 500deg;K was unmeasurably low. The results indicate that Se6and Se5are not diradicals and that the splittings between the0gplus;ground state and the1gparamagnetic state of Se2and Te2exceed 2000 K. The Se2data support the conclusion that the dissociation energy of Se2is 78.63 kcal/mole.