dc.creator Zhou, C. en_US dc.creator Balfour, W. J. en_US dc.creator Cao, J. en_US dc.creator Qian, C. X. W. en_US dc.date.accessioned 2006-06-15T19:05:25Z dc.date.available 2006-06-15T19:05:25Z dc.date.issued 1998 en_US dc.identifier 1998-RI-08 en_US dc.identifier.uri http://hdl.handle.net/1811/18968 dc.description $^{a}$ F. Illas, J. Rubio, J. canellas and J.M. Ri***, J. Chem. Phys., 93, 2603(1990) $^{b}$ P.B. Ar*** and J.L. Beauchamp, Acc. Chem. Res., 22, 315(1989) en_US dc.description Author Institution: Department of Chemistry, University of Victoria en_US dc.description.abstract Electronic transitions have been observed with LIF techniques in a supersonic molecular beam of He doped with $H_{2}$ and $D_{2}$ and laser-ablated Rh vapor. Bands of RhH have been found near 464.73 and 438.38 nm, which are assigned as (0,0) and (1,0) vibrational bands of a ${^{3}}\Delta_{3} - X^{3} \Delta_{3}$ electronic transition. There is a sudden disapperance of the rotational structure in the (1,0) band of RhH above $J^{\prime}=7$ and the spectra associated with higher vibrational levels in the excited states are missing. These observations are attributed to predissociation. Its onset agrees with an ab intio calculation of $22 664-23 955 cm^{-1a}$ and the estimate of $20 650 \pm 1 750 cm^{-1}$ from $thermochemistry.^{b}$ The RhH(0,0) band also shows irregular A-doubling. The corresponding (0,0) and (1,0) transitions in RhD appear at 463.40 and 443.02 nm. Analyses of the spectra indicate that the ground state of RhH is an inverted ${^{3}}\Delta$ state, which is believed to derive from the electronic configuration $\ldots \delta^3 \pi^{1} \sigma^{1}$ and provide the following RhH molecular constants($cm^{-1}: B^{\prime \prime}_{0}= 6.546[r^{\prime \prime}_{0}= 0.1610 nm], B^{\prime}_{0}=6.175, B^{\prime}_{1}= 5.823, \omega^{\prime \prime}_{e}= 1927, \omega^{\prime \prime}_{e}x^{\prime \prime}_{e}= 35.7, \omega^{\prime}_{e}=1645, \omega^{\prime}_{e}x^{\prime}_{e}= 174$. The observed ground state symmetry and internuclear distance agree with ab initio $predictions.^{a}$ Six additional bands have been found for RhD: near $445.15 nm(\Omega^{\prime} =3 - \Omega^{\prime \prime}=3), 428.05 nm(\Omega^{\prime} =3 - \Omega^{\prime \prime}=3)427.83 nm(\Omega^{\prime} =3 - \Omega^{\prime \prime}=3), 424.40 nm(\Omega^{\prime} =2 - \Omega^{\prime \prime}=3), 422.58 nm(\Omega^{\prime} =3 - \Omega^{\prime \prime}=3),$ and $409.24 nm(\Omega^{\prime} =4 - \Omega^{\prime \prime}=3)$. en_US dc.format.extent 153991 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title ELECTRONIC SPECTRA OF RhH AND RhD en_US dc.type article en_US
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