Antisymmetric stretching frequencies

Diketones, syn-trans-open chains 1730-1710 Antisymmetrical stretching frequency of both... 

The V (OCO) ion has a structured electronic photodissociation spectrum, which allows us to measure its vibrational spectrum using vibrationally mediated photodissociation (VMP). This technique requires that the absorption spectrum (or, in our case, the photodissociation spectrum) of vibrationally excited molecules differ from that of vibrationally unexcited molecules. The photodissociation spectrum of V (OCO) has an extended progression in the V OCO stretch, indicating that the ground and excited electronic states have different equilibrium V "—OCO bond lengths. Thus, the OCO antisymmetric stretch frequency Vj should be different in the two states, and the... 

The antisymmetric stretching frequency (XL) in the transition state corresponds to a motion along the reaction coordinate and therefore does... 

The antisymmetric stretching frequency (Vg 490 cm" ) has been observed in the infrared absorption spectrum of gaseous MgBr by Randall et al. (7). The symmetric stretching (v.) and bending (u ) frequencies are calculated from force constants by " 5 —1... 

Bond length correlations with either force constants or with the symmetric or antisymmetric stretching frequency have recently been reviewed [91]. A survey of 27 uranyl compounds gives a satisfactory correlation between the symmetric stretching frequency and the bond lengths determined by diffraction methods with the form ... 

The spectra of the tetraoxalates produced from aqueous solution is characterized by absorption bands typical of bidentate oxalate groups 226). Preparations from alcoholic solution, in addition, show a band of moderate intensity with a maximum at 1597 cm which is assigned to the antisymmetric stretching frequency of the uncoordinated COO group 289). 

From a study of the IR spectra of a number of allyl compounds of Pd(II) and Ni(II), the most noticeable features observed were the presence of a medium intensity C=C antisymmetric stretching frequency near 1458 cm" S a position expected for a conjugated double-bond system, as well as a symmetric C=C stretching vibration at 1021, this band being forbidden in ethylene complexes. 

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