IR nu(OH) band and dimerization of phosphorus acids in the gas phase and solid state

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IR nu(OH) band and dimerization of phosphorus acids in the gas phase and solid state. / Asfin, RE ; Denisov, GS; Poplevchenkov, DN; Tokhadze, KG; Velikanova, TV.

In: Polish Journal of Chemistry, Vol. 76, No. 9, 09.2002, p. 1223-1231.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{e7f814960fc741f489544583f40f88fe,

title = "IR nu(OH) band and dimerization of phosphorus acids in the gas phase and solid state",

abstract = "The infrared absorption spectra of phosphorus acids RZPOOH (R=H, CH3, CH2Cl, CH2I, C6H5, C3F7, CH3O, C4H9O) have been recorded in the gas phase and in the solid state in the range 4000-1000 cm(-1). The equilibrium between monomers and dimers of R2POOH was studied in the gas phase between 400-650 K. The broad absorption band of the v(OH) stretching vibration of the cyclic dimer in the region 3600-900 cm(-1) is registered in the gas phase spectra at 400-600 K and in thin films spectra at 90-300 K. In all cases the band has the characteristic ABC structure, typical for spectra of complexes with strong hydrogen bond in the crystal phase and solution. The intensity and the first and second spectral moments of this band were determined. It was found that, on passing from thin films at low temperature to the gas phase at high temperature, the redistribution of intensity from the low frequency wing to the high frequency wing takes place. Despite significant differences of dimerization enthalpies (20-60 kcal/mole), the spectra of all acids have similar structure and close values of spectral moments; although the values of intensities are different.",

keywords = "phosphorus acids, dimerization, gas phase and solid state, IR spectra, PHOSPHATE HYDROGEN-BONDS, CRYSTAL-STRUCTURE, PROTON POLARIZABILITY, INFRARED-SPECTRA, VIBRATION, DIMERS",

author = "RE Asfin and GS Denisov and DN Poplevchenkov and KG Tokhadze and TV Velikanova",

year = "2002",

month = sep,

language = "Английский",

volume = "76",

pages = "1223--1231",

journal = "Polish Journal of Chemistry",

issn = "0137-5083",

publisher = "Polish Chemical Society",

number = "9",

note = "null ; Conference date: 10-06-2001 Through 16-06-2001",

}

RIS

TY - JOUR

T1 - IR nu(OH) band and dimerization of phosphorus acids in the gas phase and solid state

AU - Asfin, RE

AU - Denisov, GS

AU - Poplevchenkov, DN

AU - Tokhadze, KG

AU - Velikanova, TV

PY - 2002/9

Y1 - 2002/9

N2 - The infrared absorption spectra of phosphorus acids RZPOOH (R=H, CH3, CH2Cl, CH2I, C6H5, C3F7, CH3O, C4H9O) have been recorded in the gas phase and in the solid state in the range 4000-1000 cm(-1). The equilibrium between monomers and dimers of R2POOH was studied in the gas phase between 400-650 K. The broad absorption band of the v(OH) stretching vibration of the cyclic dimer in the region 3600-900 cm(-1) is registered in the gas phase spectra at 400-600 K and in thin films spectra at 90-300 K. In all cases the band has the characteristic ABC structure, typical for spectra of complexes with strong hydrogen bond in the crystal phase and solution. The intensity and the first and second spectral moments of this band were determined. It was found that, on passing from thin films at low temperature to the gas phase at high temperature, the redistribution of intensity from the low frequency wing to the high frequency wing takes place. Despite significant differences of dimerization enthalpies (20-60 kcal/mole), the spectra of all acids have similar structure and close values of spectral moments; although the values of intensities are different.

AB - The infrared absorption spectra of phosphorus acids RZPOOH (R=H, CH3, CH2Cl, CH2I, C6H5, C3F7, CH3O, C4H9O) have been recorded in the gas phase and in the solid state in the range 4000-1000 cm(-1). The equilibrium between monomers and dimers of R2POOH was studied in the gas phase between 400-650 K. The broad absorption band of the v(OH) stretching vibration of the cyclic dimer in the region 3600-900 cm(-1) is registered in the gas phase spectra at 400-600 K and in thin films spectra at 90-300 K. In all cases the band has the characteristic ABC structure, typical for spectra of complexes with strong hydrogen bond in the crystal phase and solution. The intensity and the first and second spectral moments of this band were determined. It was found that, on passing from thin films at low temperature to the gas phase at high temperature, the redistribution of intensity from the low frequency wing to the high frequency wing takes place. Despite significant differences of dimerization enthalpies (20-60 kcal/mole), the spectra of all acids have similar structure and close values of spectral moments; although the values of intensities are different.

KW - phosphorus acids

KW - dimerization

KW - gas phase and solid state

KW - IR spectra

KW - PHOSPHATE HYDROGEN-BONDS

KW - CRYSTAL-STRUCTURE

KW - PROTON POLARIZABILITY

KW - INFRARED-SPECTRA

KW - VIBRATION

KW - DIMERS

M3 - статья

VL - 76

SP - 1223

EP - 1231

JO - Polish Journal of Chemistry

JF - Polish Journal of Chemistry

SN - 0137-5083

IS - 9

Y2 - 10 June 2001 through 16 June 2001

ER -

ID: 74142872