12177-67-2Relevant articles and documents
Observation and spectroscopy of high-lying states of the CaOH radical: Evidence for a bent, covalent state
Pereira,Levy, Donald H.
, p. 9733 - 9739 (1996)
The CaOH radical has been produced in a supersonic molecular beam by the reaction of water vapor with laser desorbed calcium. Three new electronic states, the D 2∑+, E 2∑+, and F states have been observed by laser induced fluorescence and resonance enhanced multiphoton ionization spectroscopy. The D and E states are linear, but the F state is bent, the first bent and strongly covalent state of CaOH to be observed. Vibrational constants for the D state have been determined and a partially rotationally resolved spectrum has provided the rotational constant and Ca-OH bond length in this state. The D and E states are more strongly bound than the ground state, perhaps indicating some covalent contribution to the bonding. Additional vibrational constants of the ground electronic state including the CaO-H vibrational frequency have been determined from the emission spectra.
Coxon, John A.,Mingguang, Li,Presunka, Paul I.
, p. 33 - 45 (1991)
Hilborn, Robert C.,Qingshi, Zhu,Harris, David O.
, p. 73 - 91 (1983)
Laser excited fluorescence study of reactions of excited Ca and Sr with water and alcohols: Product selectivity and energy disposal
Oberlander,Parson
, p. 5806 - 5816 (2007/10/03)
Reactions of the metastable 3PJ0 states of Ca and Sr in atomic beams with H2O, D2O, and CH3OH yielding ground electronic state products have been observed by laser excited fluorescence of MOH, MOD, and MOCH3. The water reactions favor metal hydroxide Droductsjvhile methanol reactions favor methoxides. For SrOH product, spectral simulation of the B 2Σ+ -X 2S+ transition based on coupled harmonic-oscillator Franck-Condon factors was used to determine crude vibrational energy distributions in the bending and metal-stretching modes, and simulation of a higher resolution scan of excitation of the ground vibrational level gave some information about the rotational energy distribution in that level. While excitation of metal stretching and rotation were considerable and not too far from the predictions of a prior model, bending was significantly colder. Limited spectroscopic constants and severe spectral congestion have precluded other successful simulations.
