The protonation equilibrium of 5-substituted 2-furaldehydes is investigated spectrophotometrically in aqueous sulfuric acid at $25^{\circ}C$ and the basicity constants(p$K_{BH+}$) of the substrates is calculated by means of the excess acidity method. The basicity constant of 5-metyl-2-furaldehyde having electron donating group is larger than that of 5- nitro-2-furaldehyde having electron withdrawing group. Difference between the basicity constants(p$K_{BH+}$) of these two compounds was about 3.25 pK unit. The m value which is the degree of solvation of the protonated substrate is similar to that of acetophenone having same protonation site. The dependence of p$K_{BH+}$ on m value shows good linear cor-relation.
@article{ JCGMDC_2002_v46n4_323}
,title={Basicity Constants (pKBH+) of 5-Substituted 2-Furaldehydes}
,volume={4}
, url={http://dx.doi.org/10.5012/jkcs.2002.46.4.323}, DOI={10.5012/jkcs.2002.46.4.323}
, number= {4}
, journal={Journal of the Korean Chemical Society}
, publisher={Korean Chemical Society}
, author={Jong-Pal, Lee
and
Gwi-Taek, Im
and
Yong-Hui, Lee
and
In-Seon, Gu
and
Jun-Ha, Ryu}
, year={2002}
, month={Aug}
TY - JOUR
T2 - Journal of the Korean Chemical Society
AU - Jong-Pal, Lee
AU - Gwi-Taek, Im
AU - Yong-Hui, Lee
AU - In-Seon, Gu
AU - Jun-Ha, Ryu
SN - 1017-2548
TI - Basicity Constants (pKBH+) of 5-Substituted 2-Furaldehydes
VL - 46
PB - Korean Chemical Society
DO - 10.5012/jkcs.2002.46.4.323
PY - 2002
UR - http://dx.doi.org/10.5012/jkcs.2002.46.4.323
ER -
Jong-Pal, L.
,
Gwi-Taek, I.
,
Yong-Hui, L.
,
In-Seon, G.
,
&
Jun-Ha, R.
( 2002).
Basicity Constants (pKBH+) of 5-Substituted 2-Furaldehydes.
Journal of the Korean Chemical Society,
46
(4)
Korean Chemical Society.
doi:10.5012/jkcs.2002.46.4.323
Jong-Pal, L
et al.
2002,
Basicity Constants (pKBH+) of 5-Substituted 2-Furaldehydes,
Journal of the Korean Chemical Society,
vol. 4,
no. 4,
Retrieved from http://dx.doi.org/10.5012/jkcs.2002.46.4.323
[1]
L Jong-Pal
,
I Gwi-Taek
,
L Yong-Hui
,
G In-Seon
,
and
R Jun-Ha
,
“Basicity Constants (pKBH+) of 5-Substituted 2-Furaldehydes”,
Journal of the Korean Chemical Society,
vol. 4,
no. 4,
Aug
2002.
Jong-Pal, Lee
Gwi-Taek, Im
Yong-Hui, Lee
et al.
“Basicity Constants (pKBH+) of 5-Substituted 2-Furaldehydes”
Journal of the Korean Chemical Society,
4.
4
2002:
Jong-Pal, L
,
Gwi-Taek, I
,
Yong-Hui, L
,
In-Seon, G
,
Jun-Ha, R
Basicity Constants (pKBH+) of 5-Substituted 2-Furaldehydes.
Journal of the Korean Chemical Society
[Internet].
2002.
Aug ;
4
(4)
Available from http://dx.doi.org/10.5012/jkcs.2002.46.4.323
Jong-Pal, Lee
,
Gwi-Taek, Im
,
Yong-Hui, Lee
,
In-Seon, Gu
,
and
Jun-Ha, Ryu
,
“Basicity Constants (pKBH+) of 5-Substituted 2-Furaldehydes.”
Journal of the Korean Chemical Society
4
no.4
()
Aug,
2002):
http://dx.doi.org/10.5012/jkcs.2002.46.4.323