Stereochemical structure of trialkyl phosphates

Raevskii, O. A.; Vereshchagin, A. N.; Donskaya, Yu. A.; Abul'khanov, A. G.; Levin, Ya. A.

doi:10.1007/bf00921714

Cited by 1 publication

(1 citation statement)

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“…In fact, the problem of conformational isomerism in TMP has been addressed many times during several decades. The molecule has been extensively studied in the past using vibrational spectroscopy in solutions [7][8][9][10][11][12][13][14][15][16][17][18][19], in gaseous [18,20] and solid [17][18][19] phases, and isolated in cryogenic matrices [19][20][21][22][23][24]; NMR spectroscopy [14,15,25]; electron diffraction [26]; dipole moments and Kerr constants methods [7,27]; dielectric loss spectroscopy [28]; and theoretically [14,21,[29][30][31]. And this big list of references is far from being complete.…”

Section: Introductionmentioning

confidence: 99%

Conformational properties of trimethyl phosphate monomer

Reva

Simão

Fausto

2005

Chemical Physics Letters

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Conformational isomerism of trimethylphosphate (TMP) has been studied de novo. TMP monomers were isolated in low temperature xenon matrices at different substrate temperatures and characterized using FTIR spectroscopy. At the lowest temperature, three different conformers, with overall molecular symmetries C 3 , C 1 and C s , were shown to co-exist in the matrix. Increase of the sample temperature led to conformational cooling, with the two minor conformers being depopulated successively, following an order of increasing stability. Initially, the less stable C s conformer converted to the C 1 form and, at higher temperatures, the C 1 conformer converted to the global energy minimum, C 3 . Interpretation of the experimental data was supported by extensive calculations of the vibrational spectra and barriers to the conformational interconversion.

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