Trans vibrational spectroscopy

Bain C D 1995 Sum-frequency vibrational spectroscopy of the solid-liquid interface J. Chem. See. Faraday Trans. 91 1281-96... 

P. Skinner, M. W. Howard, I. A. Oxton, S. F. A. Ketde, D. B. Powell, and N. Sheppard./ Chem. Soc., Faraday Trans. 2,1203, 1981. Vibrational spectroscopy (infrared) studies of an organometallic compound containing the ethylidyne ligand. 

Vibrational spectroscopy indicates that the hyponitrite ion has the trans- (C2/1) configuration (1) in the above salts. 

Complexes with type II structures are compiled in Table II along with their S—S distances and S—S vibrational frequencies. There are several examples of complexes of structure type Ila (planar trans end-on bridging coordination). Vibrational spectroscopy 174) indicates that this structure occurs in [(CN)5Co(S2)Co(CN)5] (7). Trans arrangement of the metal atoms has been proved by X-ray structure determination for [(NH3)5Ru(S2)Ru(NH3)5]Cl4 2H20 15, 44). 

Monooxo and cis- and trans-6ioxo complexes of ruthenium(VI) and osmium(VI) are known, with the trans-6ioxo species being most common. In general, these complexes are all diamagnetic and are characterized by vibrational spectroscopy and/or X-ray crystallography. One intense metal-0x0 stretch is usually observed for monooxo and trans-dioxo complexes while two metal-oxo stretches, j/s(M(0)2) and J/as(M(0)2), are found for the cw-dioxo species in the IR spectra. The structural and vibrational data are listed in Table 4. 

The trans influence can be measured by many techniques, including bond lengths from X-ray structures, bond stretching force constants from vibrational spectroscopy, or from 197Au Mossbauer or NQR parameters. 

The vibrational spectroscopy time scale (10-300 x 10 sec) is appropriate for the direct sampling of the fastest motion expected to occur in phospholipid acyl chains, namely trans-gauche isomerization. To date, most Raman ai)d FT-IR studies of phospholipid phase behavior and lipid/protein interaction have focused mainly on qualitative measures of acyl chain organization. For example, the... 

The conformation and gas-phase structure of difluorosulphenylimine, F2S(0)NCN, has been studied by vibrational spectroscopy [91] and electron diffraction [92]. Depending on the orientation of the cyano group relative to the S=0 bond, cis- and trans-conformers can occur in this compound. Both gas-phase studies conclude that the composition is 10% cis and 90% trans isomer. 

Some peptide antibiotics act as trans-membrane ion channels. Vibrational spectroscopy shows that ionophores, such as gramicidin A, valinomycin, nystatin, and amphotericins, interact with phospholipid bilayers (Susi et al., 1979). 

Barnes, A. J., Kuzniarski, J. N, S., and Mielke, Z., Strongly hydrogen-bonded molecular complexes studied by matrix-isolation vibrational spectroscopy. Part 2. Amine-hydrogen chloride complexes, J. Chem. Soc., Faraday Trans. 2 80,465-476 (1984). 

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