Infrared spectra of HF complexes with CCl{sub 4}, CHCl{sub 3}, and CH{sub 2}Cl{sub 2} in solid argon
- Oak Ridge National Laboratory, TN (United States)
- Univ. of Virginia, Charlottesville, VA (United States)
Hydrogen fluoride complexes with CCl{sub 4}, CHCl{sub 3}, and CH{sub 2}Cl{sub 2} were prepared in argon matrices and characterized by infrared spectroscopy. The spectra of CCl{sub 4} and HF revealed a strong CCl{sub 4}-HF complex absorption at 3876 cm{sup {minus}1} with a considerably weaker band at 3904 cm{sup {minus}1} due to the CCl{sub 4}-FH complex. Only one 1:2 complex, CCl{sub 4}-HF-HF, was observed at higher HF concentrations and matrix annealings. Similarly, the HF interaction with CH{sub 2}Cl{sub 2} produced two 1:1 complexes and one 1:2 complex. However, the major product absorption at 3901 cm{sup {minus}1} was assigned to the anti-hydrogen-bonded complex, Ch{sub 2}Cl{sub 2}-FH, while a less intense doublet due to the CH{sub 2}Cl{sub 2}-HF complex appeared at 3799 and 3793 cm{sup {minus}1}. The IR spectra of CHCl{sub 3} and HF were more complicated due to the presence of a third 1:1 complex. The CHCl{sub 3}-HF complex band at 3860 cm{sup {minus}1} was clearly the strongest product absorption. In addition, the ChCl{sub 3}- H complex produced a 3903-cm{sup {minus}1} absorption, while a triplet probably due to the HF-HCCl{sub 3} complex was observed at 3893, 3883, and 3875 cm{sup {minus}1}. Finally, the acid-base properties of these common solvents were considered. 31 refs., 4 figs., 1 tab.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 281149
- Journal Information:
- Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 17 Vol. 96; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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