Autodetachment spectroscopy of vibrationally excited acetaldehyde enolate anion, CH2CHO-
نویسندگان
چکیده
The autodetachment spectrum of acetaldehyde enolate anion, CH,CHO-, is recorded near 14180 cm-’ using a coaxial laserion threshold photodetachment spectrometer. The spectrum represents transitions from u= 1 in the v) C-C-O bending mode of CH,CHOto u=O m the autodetaching dipole-bound state of the anion. The 32 rotationally resolved (0, 1) hot band transitions reported here were fit to Watson’s A-reduced Hamiltonian m conjunction with the previously reported (0, 0) transitions. Rotational constants for vJ u= 1 of the ground electronic state are determined to be A=2.782(2) cm-‘, B= 1.3619(4) cm-‘, and C=O.3147(4) cm-‘. The (0, 1) band origin is 14186.928(S) cm-‘, which places w0 for the Y, mode at 525.82( 1) cm-‘.
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