Rotational analysis of the 7000 Aring; (Athinsp;3Fgr;rarr;Xthinsp;3Dgr;) electronic emission system of diatomic vanadium mononitride (VN)

摘要

The (0,0) band of the electronic emission system of the diatomic molecule VN at sim;7000 Aring; has been generated and rotationally analyzed. The system is3Fgr;rrarr;3Dgr;rand is the vanadium analog of the niobium nitride system centered sim;6029 Aring;. The constants for the upper and lower (almost certainly the ground) states have been determined, including estimates of the spinndash;orbit coupling constants, despite the absence of satellite bands. The subband origins are somewhat asymmetrically located, probably due to the interaction of the3Dgr;2and the higher lying (by sim;3000 cmminus;1)1Dgr;2state. There is no evidence of localized perturbations in any of the subbands. VN has the shortest bond length (r0=1.566 Aring; ) observed for any diatomic molecule containing a transition metal (apart from some hydrides). The (1,1) sequence bands have also been observed but have not been rotationally analyzed at this time.