%0 Journal Article
%A Gareyev, Roustam
%A Streitwieser, Andrew
%D 1996
%T Lithium and Cesium Ion-Pair Acidities of Some Terminal
Acetylenes and Aggregation in Tetrahydrofuran1
%U https://acs.figshare.com/articles/journal_contribution/Lithium_and_Cesium_Ion-Pair_Acidities_of_Some_Terminal_Acetylenes_and_Aggregation_in_Tetrahydrofuran_sup_1_sup_/3700848
%R 10.1021/jo951243q.s001
%2 https://acs.figshare.com/ndownloader/files/5791290
%K concentration
%K aggregation number
%K EA
%K triphenylpropyne
%K EB
%K 1.2. Cesium acidities
%K TPP
%K THF
%K aggregated
%K ethynyladamantane
%K equilibrium lithium acidities
%X The equilibrium lithium acidities in THF have been determined for
4-ethynylbiphenyl, EB (pK
21.5−22.3), 3,3,3-triphenylpropyne, TPP (pK 22.3−22.7),
and 1-ethynyladamantane, EA (pK 23.7).
Ion pairs of (4-ethynylbiphenylyl)lithium are aggregated in
the concentration range from 10-4
to
10-3 M, with an average aggregation number of
2.5. (3,3,3-Triphenylpropynyl)lithium ion pairs
are partially aggregated at concentrations from
10-5 to 10-3 M; the
average aggregation number is
1.2. Cesium acidities in THF have been determined for
3,3,3-triphenylpropyne (pK 29.1−29.9)
and 1-ethynyladamantane (pK 31.56). The average
aggregation number of (3,3,3-triphenylpropynyl)cesium ion pairs is 6.2 at concentrations of
10-4−10-3
M.
%I ACS Publications