Infinite dilution activity coefficient measurements of organic solutes in fluorinated ionic liquids by gas-liquid chromatography and the inert gas stripping method

5.1.6. 1-Butyl-3-methylimidazolium hexafluoroantimonate, [BMIM] [SbF6]

Table 5-18: Activity coefficients at infinite dilution of organic solutes in

1-butyl-3-methylimidazolium hexafluoroantimonate with n3 = 3.312 mmol (26.90 %) at T =
(313.15, 323.15 and 333.15) K.

	Experimental at		/K			Solute
n3/mmol	T=313.15	T=323.15	T=333.15		n-pentane.
3.312	19.611	17.552	16.962		n-hexane
3.312	28.627	26.428	25.994		n-heptane
3.312	37.066	34.182	31.424		n-octane
3.312	40.437	39.454	39.176		n-nonane
3.312	47.704	44.947	44.137		Pent-1-ene
3.312	9.956	10.168	9.938		Hex-1-ene
3.312	14.006	13.017	13.356		Hept-1-ene
3.312	19.291	17.762	15.857		Oct-1-ene
3.312	25.680	24.604	24.205		Non-1-ene
3.312	32.427	30.780	30.800		Pent-1-yne
3.312	2.817	2.885	2.933		Hex-1-yne
3.312	4.256	4.108	4.102		Hept-1-yne
3.312	5.741	5.816	5.739		Oct-1-yne
3.312	8.678	8.820	8.558		Non-1-yne
3.312	11.426	10.934	10.894		Cyclopentane
3.312	11.379	10.560	10.193		Cyclohexane
3.312	16.409	11.044	14.132		Cycloheptane
3.312	19.954	15.745	17.295		Cyclooctane
3.312	22.852	17.172	20.433		Methanol
3.312	1.701	1.639	1.565		Ethanol
3.312	2.334	2.144	2.005		Propan-1-ol
3.312	3.128	2.819	2.513		Benzene
3.312	1.229	1.276	1.314		Toluene
3.312	1.866	1.876	1.916		Ethylbenzene
3.312	3.113	3.085	3.176		Acetone
3.312	0.403	0.445	0.463		Butan-2-one
3.312	0.648	0.681	0.702

Table 5-19: Activity coefficients at infinite dilution of organic solutes in

1-butyl-3-methylimidazolium hexafluoroantimonate with n3 = 4.578 mmol (31.98 %) at T =
(313.15, 323.15 and 333.15) K.

Experimental at /K

Solute	n3/mmol	T=313.15	T=323.15		T=333.15	n-pentane.
4.578	21.459	18.268	18.088		n-hexane
4.578	27.893	28.232	26.626		n-heptane
4.578	38.734	35.798	34.386		n-octane
4.578	44.603	42.656	42.714		n-nonane
4.578	48.766	49.123	47.263		Pent-1-ene
4.578	10.474	10.232	10.442		Hex-1-ene
4.578	13.134	14.103	13.754		Hept-1-ene
4.578	21.109	19.698	16.623		Oct-1-ene
4.578	25.700	25.696	24.915		Non-1-ene
4.578	32.573	33.420	32.620		Pent-1-yne
4.578	2.883	2.885	3.027		Hex-1-yne
4.578	4.054	4.232	4.318		Hept-1-yne
4.578	6.109	6.084	6.231		Oct-1-yne
4.578	9.402	9.080	8.992		Non-1-yne
4.578	11.634	11.846	11.646		Cyclopentane
4.578	11.881	10.860	10.657		Cyclohexane
4.578	15.391	18.626	14.558		Cycloheptane
4.578	18.666	21.075	18.175		Cyclooctane
4.578	23.418	27.128	21.467		Methanol
4.578	1.880	1.711	1.565		Ethanol
4.578	2.456	2.296	2.065		Propan-1-ol
4.578	3.222	2.961	2.747		Benzene
4.578	1.311	1.374	1.370		Toluene
4.578	1.784	1.944	1.972		Ethylbenzene
4.578	2.917	3.225	3.450		Acetone
4.578	0.437	0.459	0.487		Butan-2-one
4.578	0.632	0.681	0.718

Table 5-20: Average activity coefficients at infinite dilution of organic solutes in

1-butyl-3-methylimidazolium hexafluoroantimonate at T = (313.15, 323.15 and 333.15) K.					Experimental
at /K				Solute
T=313.15		T=323.15	T=333.15	n-pentane.
20.535		17.910	17.525	n-hexane
28.260		27.330	26.310	n-heptane
37.900		34.990	32.905	n-octane
42.520		41.055	40.945	n-nonane
48.235		47.035	45.700	Pent-1-ene
10.215		10.200	10.190	Hex-1-ene
13.570		13.560	13.555	Hept-1-ene
20.200		18.730	16.240	Oct-1-ene
25.690		25.150	24.560	Non-1-ene
32.500		32.100	31.710	Pent-1-yne
2.850		2.885	2.980	Hex-1-yne
4.155		4.170	4.210	Hept-1-yne
5.925		5.950	5.985	Oct-1-yne
9.040		8.950	8.775	Non-1-yne
11.530		11.390	11.270	Cyclopentane
11.630		10.710	10.425	Cyclohexane
15.900		14.835	14.345	Cycloheptane
19.310		18.410	17.735	Cyclooctane
23.135		22.150	20.950	Methanol
1.790		1.675	1.565	Ethanol
2.395		2.220	2.035	Propan-1-ol
3.175		2.890	2.630	Benzene
1.270		1.325	1.342	Toluene
1.825		1.910	1.944	Ethylbenzene
3.015		3.155	3.313	Acetone
0.420		0.452	0.475	Butan-2-one
0.640		0.681	0.710

Table 5-21: Excess molar enthalpies at infinite dilution of organic solutes in the ionic

liquid 1-butyl-3-methylimidazolium hexafluoroantimonate calculated using the Gibbs-
Helmholtz equation.

Solute	Linear regression using Eq.(2-21)

n-pentane.	0.793	0.467	0.851		6.59	n-hexane
0.357	2.198	0.999	2.97		n-heptane
0.707	1.371	0.994	5.88		n-octane
0.189	3.141	0.803	1.57		n-nonane
0.270	3.013	0.999	2.25		Pent-1-ene
0.012	2.285	0.987	0.10		Hex-1-ene
0.006	2.590	0.964	0.05		Hept-1-ene
1.091	-0.474	0.969	9.07		Oct-1-ene
0.225	2.527	0.999	1.87		Non-1-ene
0.123	3.088	1.000	1.02		Pent-1-yne
-0.223	1.758	0.936	-1.85		Hex-1-yne
-0.066	1.634	0.936	-0.55		Hept-1-yne
-0.050	1.940	0.991	-0.42		Oct-1-yne
0.149	1.727	0.966	1.24		Non-1-yne
0.114	2.080	0.998	0.95		Cyclopentane
0.547	0.694	0.921	4.55		Cyclohexane
0.515	1.114	0.961	4.28		Cycloheptane
0.425	1.598	0.995	3.53		Cyclooctane
0.496	1.556	0.995	4.12		Methanol
0.672	-1.567	1.000	5.59		Ethanol
0.814	-1.731	0.998	6.77		Propan-1-ol
0.942	-1.858	1.000	7.83		Benzene
-0.276	1.126	0.912	-2.30		Toluene
-0.316	1.617	0.939	-2.63		Ethylbenzene
-0.471	2.611	0.999	-3.92		Acetone
-0.615	1.105	0.998	-5.11		Butan-2-one
-0.519	1.218	0.987	-4.32

3.9

3.7

In( ⁰'13)

3.5

3.3

3.1

2.9

2.7

2.95 3 3.05 3.1 3.15 3.2 3.25

1000K/T

Figure 5-33: Plots of versus for alkanes in [BMIM] [SbF6] together with a linear

correlation of the data using the Gibbs-Helmholtz equation; () n-pentane, () n-hexane,
(?) n-heptane, (x) n-octane, (+) n-nonane.

2.95 3 3.05 3.1 3.15 3.2 3.25

1000K/T

1n( L13)

2.8

2.6

2.4

2.2

3.6

3.4

3.2

2

3

Figure 5-34: Plots of versus for alk-1-enes in [BMIM] [SbF6] together with a linear

correlation of the data using the Gibbs-Helmholtz equation; () pent-1-ene, () hex-1-ene,
(?) hept-1-ene, (x) oct-1-ene and (+) non-1-ene

	3 2.5
2

2.95 3 3.05 3.1 3.15 3.2 3.25

1000K/T

Figure 5-35: Plots of versus for alk-1-ynes in [BMIM] [SbF6] together with a linear

correlation of the data using the Gibbs-Helmholtz equation; () pent-1-yne, () hex-1-yne,
(?) hept-1-yne, (x) oct-1-yne and (?) non-1-yne.

2.95 3 3.05 3.1 3.15 3.2 3.25

1000K/T

3.4

3.2

3

¹¹¹( EF13)

2.8

2.6

2.4

2.2

2

Figure 5-36: Plots of versus for cycloalkanes in [BMIM] [SbF6] together with a linear

correlation of the data using the Gibbs-Helmholtz equation; () cyclopentane, () cyclohexane,
(?) cycloheptane and (x) cyclooctane.

¹¹¹( EF13)

0.95

0.75

0.55

0.35

1.15

2.95 3 3.05 3.1 3.15 3.2 3.25

1000K/T

Figure 5-37: Plots of versus for alkanols in [BMIM] [SbF6] together with a linear

correlation of the data using the Gibbs-Helmholtz equation; () methanol, () ethanol and
(?) propan-1-ol.

1.4

1.2

1

0.8

0.6

0.4

0.2

0

2.95 3 3.05 3.1 3.15 3.2 3.25

1000K/T

In( 0'13)

Figure 5-38: Plots of versus for alkylbenzenes in [BMIM] [SbF6] together with a

linear correlation of the data using the Gibbs-Helmholtz equation; () benzene, () toluene and
(?) ethylbenzene.

2.95 3 3.05 3.1 3.15 3.2 3.25

1000K/T

-0.2

-0.4

in( L^1:13)

-0.6

-0.8

-1

Figure 5-39: Plots of versus for ketones in [BMIM] [SbF6] together with a linear

correlation of the data using the Gibbs-Helmholtz equation; () acetone and () butan-2-one.

0 1 2 3 4 5 6 7 8 9 10

Nc

in (L13)

-1

-2

4

2

3

0

5

1

Figure 5-40: Plots of versus the number of carbon atoms at 313.15 K for () n-alkanes,

(?) alk-1-enes, (?) alk-1-ynes, and () cycloalkanes, (o) alkanols, (?) alkylbenzenes and (?)
ketones in [BMIM] [SbF6].