Gas‐phase proton affinities of HF (95.5±1.4 kcal/mol), HCl (135±1 kcal/mol), and HBr (141±1 kcal/mol) have been measured along with the HX+–HX binding energies for the HCl and HBr systems (20±2 and 23±2 kcal/mol, respectively) by photoionization of van der Waals molecules produced in a supersonic expansion. A detailed discussion of the potentialities and limitations of the method is presented.

1.
M. T.
Bowers
,
D. H.
Aue
,
H. M.
Webb
, and
R. T.
McIver
, Jr.
,
J. Am. Chem. Soc.
93
,
4314
(
1971
).
2.
D. H.
Aue
,
H. M.
Webb
, and
M. T.
Bowers
,
J. Am. Chem. Soc.
98
,
311
(
1976
).
3.
J. F.
Wolf
,
R. H.
Staley
,
I.
Koppel
,
M.
Taagepera
,
R. T.
McIver
, Jr.
,
J. L.
Beauchamp
, and
R. W.
Taft
,
J. Am. Chem. Soc.
99
,
5417
(
1977
).
4.
P.
Kebarle
,
R.
Yamdagni
,
K.
Hiraoka
, and
T. B.
McMahon
,
Int. J. Mass Spectrom. Ion Phys.
19
,
71
(
1976
).
5.
K.
Tanaka
,
G. I.
Mackay
, and
D. K.
Bohme
,
Can. J. Chem.
56
,
193
(
1978
).
6.
K. G.
Hartman
and
S. G.
Lias
,
Int. J. Mass Spectrom. Ion Phys.
28
,
213
(
1978
).
7.
R.
Yamdagni
and
P.
Kebarle
,
J. Am. Chem. Soc.
98
,
1320
(
1976
).
8.
S. G.
Lias
,
Chem. Phys. Lett.
54
,
147
(
1978
).
9.
F. P.
Lossing
and
G. P.
Semeluk
,
Can. J. Chem.
48
,
955
(
1970
).
10.
F. A. Houle and J. L. Beauchamp, 175th American Chemical Society National Meeting, Anaheim, California, March 13–17, 1978, Phys. 159.
11.
Y. K.
Lau
,
P. P. S.
Saluja
,
P.
Kebarle
, and
R. W.
Alder
,
J. Am. Chem. Soc.
100
,
7328
(
1978
).
12.
K. M. A.
Refaey
and
W. A.
Chupka
,
J. Chem. Phys.
48
,
5205
(
1968
).
13.
C. Y.
Ng
,
D. J.
Trevor
,
P. W.
Tiedemann
,
S. T.
Ceyer
,
P. L.
Kronebusch
,
B. H.
Mahan
, and
Y. T.
Lee
,
J. Chem. Phys.
67
,
4235
(
1977
).
14.
S. T.
Ceyer
,
P. W.
Tiedemann
,
B. H.
Mahan
, and
Y. T.
Lee
,
J. Chem. Phys.
70
,
14
(
1979
).
15.
M. S.
Foster
and
J. L.
Beauchamp
,
Inorg. Chem.
14
,
1229
(
1975
).
16.
C. W.
Polley
and
B.
Munson
,
Int. J. Mass Spectrom. Ion Phys.
26
,
49
(
1978
).
17.
C. Y. Ng, Ph.D. Thesis (University of California, Berkeley, 1976).
18.
C. Y.
Ng
,
B. H.
Mahan
, and
Y. T.
Lee
,
J. Chem. Phys.
65
,
1956
(
1976
).
19.
C. Y.
Ng
,
P. W.
Tiedemann
,
B. H.
Mahan
, and
Y. T.
Lee
,
J. Chem. Phys.
66
,
3985
(
1977
).
20.
J.
Berkowitz
,
W. A.
Chupka
,
P. M.
Guyon
,
J. H.
Holloway
, and
R.
Spohr
,
J. Chem. Phys.
54
,
5165
(
1971
).
21.
G. C. Pimentel and A. L. McClellan, The Hydrogen Bond (W. H. Freeman, San Francisco, 1960), p. 212.
22.
H. M.
Rosenstock
,
K.
Draxl
,
B. W.
Steiner
, and
J. T.
Herron
,
J. Phys. Chem. Ref. Data
6
, Suppl.
1
(
1977
).
23.
P.
Kollman
,
A.
Johansson
, and
S.
Rothenberg
,
Chem. Phys. Lett.
24
,
199
(
1974
).
24.
J. H. D.
Eland
and
J.
Berkowitz
,
J. Chem. Phys.
67
,
5034
(
1977
).
25.
JANAF Thermochemical Tables, Natl. Stand. Ref. Data Ser. 37, Natl. Bur. Stand. June 1971.
26.
P. M.
Guyon
and
J.
Berkowitz
,
J. Chem. Phys.
54
,
1814
(
1971
).
27.
G. G.
Jones
and
J. W.
Taylor
,
J. Chem. Phys.
68
,
1768
(
1978
).
28.
S. L. Anderson, T. Hirooka, P. W. Tiedemann, and Y. T. Lee, unpublished results.
This content is only available via PDF.
You do not currently have access to this content.