Knowledge Bank

$\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}$ J.C.Owrutsky, N.H.Rosenbaum, L.M.Tack and R.J.Saykally, JCP 83, 5338(1985). $\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}$ D.J.Liu and T.Oka, JCP 84, 1312(1986). Address of Authors: Department of Chemistry and Astronomy and Astrophysics. The University of Chicago, Chicago, Illinois 60637

$"Following the spectroscopic results on $OH-,1,2$ the fundamental $v=1+0$ vibration-rotation band of $OD-$ has been observed using the tunable infrared radiation from a difference frequency laser system and the velocity modulation technique for detection. $OD-$ was produced in an AC discharge with a mixture of $D2:O2$ in a 1:3 ratio. The spectrum has led to the following molecular constants: $\nu 0=2625.332(3)cm-1,B0=9.98459(21),B1=9.68615(19),Do=5.549(15)\times 10-4,D1=5.470(12)\times 10-4$. A remarkable similarity between molecular constants of $OD-$ and OD has been noticed and utilized to obtain the following equilibrium constants: $\omega e=2723.4(10)cm-1,\omega exe=49.65(50),\omega eye=0.38(15),B0=10.13599(30),\propto e=0.3043(5),\gamma e=0.292(20)\times 10-2,De=5.588(18)\times 10-4,\beta e=0.079(19)\times 10-4$. These vibration-rotation constants were used to determine the equilibrium bond length $re=0.96425(8)\backslash AA$ and the quadratic, cubic and quartic force constants: $F2=7.82mdyne/\backslash AA,F3=-57.omdyne/\backslash AA2F4=364mdyne/\backslash AA3$. The similarity between $OD-$ and OD will be discussed in light of the obtained results.