Table S1
Specification of chemical samples
Chemical name
1-Butyl-3-Methyl-
CAS No.
85100-77-2
Provenance
Mass fraction purity
Sigma-Aldrich, USA
> 0.97
> 0.99
Imidazolium Bromide
Methyl acetate
79-20-9
Merck, Germany
Ethyl acetate
141-78-6
SD Fine Chem Ltd, ,India
0.995
Butyl acetate
123-86-4
Sisco Research Lab Pvt. Ltd.,
0.99
India
1
Table S2
Values of apparent molar volumes V and apparent molar adiabatic compressibility K  of alkyl acetates in aqueous solutions of [bmim][Br] at
different temperatures and atmospheric pressure
V  10 6/ m3mol-1
a
m / mol·kg-1
T=288.15 K
T=293.15 K
T=298.15K
K   10 6/ m3mol-1GPa-1
T=303.15K
T=308.15K
T=288.15K
T=293.15K
T=298.15K
T=303.15K
T=308.15 K
Methyl acetate + water
0.0912
76.09
77.17
78.12
78.88
79.51
-45.96
-45.03
-44.19
-43.43
-42.87
0.1795
76.05
77.15
78.08
78.91
79.59
-46.22
-45.29
-44.44
-43.68
-43.11
0.2929
76.05
77.16
78.11
78.92
79.66
-46.34
-45.40
-44.54
-43.78
-43.21
0.3492
76.05
77.16
78.11
78.93
79.71
-46.37
-45.42
-44.57
-43.81
-43.23
0.4451
76.09
77.16
78.10
78.96
79.74
-46.41
-45.46
-44.61
-43.84
-43.27
0.5460
76.10
77.17
78.13
78.98
79.79
-46.44
-45.49
-44.63
-43.87
-43.29
0.6928
76.13
77.23
78.09
78.99
79.87
-46.48
-45.52
-44.66
-43.89
-43.31
0.7952
76.19
77.25
78.11
79.02
79.96
-46.50
-45.54
-44.68
-43.90
-43.32
0.9128
76.24
77.23
78.14
79.09
80.05
-46.52
-45.56
-44.69
-43.92
-43.33
Methyl acetate + 0.1019 molkg-1 [bmim][Br]
0.0547
75.97
76.89
77.90
79.10
79.62
-44.88
-43.95
-43.20
-42.55
-42.08
0.1054
75.99
76.91
77.94
79.13
79.68
-45.28
-44.35
-43.59
-42.93
-42.46
0.1975
76.02
77.02
78.01
79.22
79.80
-45.50
-44.55
-43.79
-43.13
-42.65
0.2892
76.08
77.11
78.09
79.31
79.88
-45.58
-44.63
-43.87
-43.20
-42.73
2
0.3774
76.12
77.22
78.15
79.38
80.00
-45.62
-44.68
-43.91
-43.24
-42.76
0.5165
76.18
77.38
78.27
79.51
80.12
-45.67
-44.72
-43.95
-43.27
-42.80
0.5833
76.21
77.43
78.32
79.55
80.21
-45.69
-44.73
-43.96
-43.29
-42.81
0.6944
76.23
77.52
78.40
79.68
80.35
-45.71
-44.75
-43.98
-43.30
-42.82
0.8109
76.30
77.62
78.48
79.78
80.49
-45.73
-44.76
-43.99
-43.31
-42.82
0.9019
76.32
77.69
78.58
79.85
80.60
-45.75
-44.77
-44.00
-43.31
-42.83
Methyl acetate + 0.3042 molkg-1 [bmim][Br]
0.0786
76.10
76.98
77.96
78.84
79.74
-45.66
-44.72
-43.88
-43.22
-42.56
0.1277
76.15
77.00
77.96
78.81
79.75
-45.89
-44.95
-44.10
-43.44
-42.77
0.2127
76.20
77.04
78.00
78.85
79.79
-46.04
-45.10
-44.25
-43.59
-42.91
0.2928
76.25
77.11
78.01
78.87
79.82
-46.11
-45.17
-44.31
-43.65
-42.97
0.3807
76.31
77.14
78.05
78.89
79.86
-46.15
-45.21
-44.35
-43.69
-43.01
0.4836
76.38
77.20
78.06
78.94
79.92
-46.19
-45.24
-44.38
-43.72
-43.04
0.6173
76.44
77.26
78.08
78.99
80.00
-46.22
-45.27
-44.42
-43.74
-43.06
0.7161
76.52
77.34
78.14
79.02
80.01
-46.24
-45.29
-44.43
-43.76
-43.08
0.7560
76.56
77.34
78.14
79.01
80.04
-46.25
-45.30
-44.44
-43.77
-43.08
0.8959
76.64
77.39
78.20
79.09
80.14
-46.27
-45.32
-44.45
-43.78
-43.09
Ethyl acetate + water
0.0876
96.78
97.67
98.88
99.62
100.48
-45.93
-45.00
-44.16
-43.40
-42.84
0.1597
96.79
97.71
98.90
99.65
100.53
-46.17
-45.24
-44.39
-43.63
-43.06
0.2659
96.78
97.73
98.92
99.69
100.60
-46.29
-45.35
-44.50
-43.74
-43.17
3
0.3963
96.77
97.76
98.89
99.76
100.69
-46.35
-45.41
-44.55
-43.79
-43.22
0.4685
96.78
97.77
98.89
99.80
100.73
-46.37
-45.42
-44.57
-43.80
-43.23
0.5572
96.79
97.79
98.89
99.82
100.78
-46.39
-45.44
-44.58
-43.82
-43.24
0.6954
96.81
97.81
98.89
99.87
100.85
-46.41
-45.46
-44.59
-43.83
-43.25
0.7958
96.80
97.83
98.92
99.91
100.91
-46.42
-45.46
-44.60
-43.83
-43.25
0.9000
96.82
97.86
98.93
99.91
100.96
-46.42
-45.47
-44.60
-43.83
-43.25
Ethyl Acetate + 0.1019 molkg-1 [bmim][Br]
0.0518
95.76
96.87
97.67
98.14
98.88
-44.83
-43.90
-43.14
-42.51
-42.03
0.1138
95.88
96.98
97.84
98.32
99.05
-45.31
-44.37
-43.61
-42.96
-42.48
0.2155
96.11
97.18
97.99
98.62
99.35
-45.50
-44.56
-43.80
-43.14
-42.66
0.3294
96.36
97.45
98.29
98.94
99.67
-45.58
-44.63
-43.86
-43.21
-42.73
0.4057
96.54
97.65
98.48
99.17
99.90
-45.60
-44.65
-43.89
-43.23
-42.75
0.4932
96.69
97.86
98.66
99.41
100.17
-45.62
-44.67
-43.90
-43.24
-42.77
0.5822
96.88
98.05
98.89
99.63
100.41
-45.63
-44.68
-43.91
-43.25
-42.77
0.6902
97.09
98.28
99.14
99.92
100.76
-45.64
-44.68
-43.91
-43.25
-42.77
0.7862
97.33
98.47
99.39
100.19
101.03
-45.64
-44.68
-43.91
-43.25
-42.76
0.9028
97.53
98.72
99.63
100.51
101.34
-45.63
-44.67
-43.90
-43.24
-42.75
Ethyl Acetate + 0.3042 molkg-1 [bmim][Br]
0.0461
96.89
97.89
98.88
99.88
101.04
-45.23
-44.31
-43.47
-42.82
-42.16
0.1030
96.93
97.87
98.91
99.96
101.08
-45.79
-44.85
-44.00
-43.35
-42.68
0.2031
96.94
97.90
98.94
99.95
101.16
-46.01
-45.07
-44.22
-43.55
-42.88
4
0.3055
96.94
97.88
98.93
99.98
101.21
-46.09
-45.14
-44.29
-43.62
-42.95
0.4178
96.95
97.90
98.93
99.97
101.24
-46.13
-45.18
-44.32
-43.66
-42.98
0.5210
96.99
97.94
99.00
100.07
101.25
-46.15
-45.20
-44.34
-43.67
-42.99
0.5895
97.03
97.98
99.00
100.03
101.25
-46.16
-45.21
-44.35
-43.68
-43.00
0.6871
97.03
97.99
99.01
100.06
101.34
-46.17
-45.22
-44.36
-43.69
-43.00
0.7705
97.05
97.99
99.02
100.13
101.37
-46.18
-45.23
-44.36
-43.69
-43.00
0.8930
97.08
98.01
99.06
100.19
101.44
-46.19
-45.23
-44.37
-43.69
-43.00
Butyl acetate + water
0.0868
132.41
133.44
134.61
135.44
136.63
-45.92
-44.99
-44.15
-43.39
-42.83
0.1730
132.34
133.35
134.49
135.30
136.46
-46.18
-45.25
-44.40
-43.64
-43.07
0.2749
132.21
133.19
134.31
135.18
136.26
-46.28
-45.34
-44.49
-43.73
-43.16
0.3980
132.04
133.01
134.12
135.01
136.01
-46.33
-45.38
-44.53
-43.77
-43.20
0.4754
131.97
132.91
133.96
134.90
135.85
-46.34
-45.40
-44.55
-43.79
-43.21
0.5689
131.83
132.73
133.79
134.78
135.66
-46.36
-45.42
-44.56
-43.80
-43.23
0.6605
131.73
132.61
133.65
134.65
135.49
-46.37
-45.43
-44.57
-43.81
-43.24
0.7991
131.56
132.42
133.44
134.42
135.20
-46.38
-45.44
-44.58
-43.82
-43.25
0.9020
131.43
132.24
133.31
134.28
134.98
-46.39
-45.45
-44.59
-43.83
-43.26
Butyl Acetate + 0.1019 molkg-1 [bmim][Br]
0.0529
132.52
133.56
134.52
135.53
136.49
-44.84
-43.92
-43.17
-42.52
-41.95
0.1056
132.44
133.46
134.43
135.43
136.38
-45.26
-44.33
-43.57
-42.92
-42.34
0.1988
132.30
133.37
134.30
135.27
136.16
-45.46
-44.52
-43.76
-43.10
-42.53
5
0.2929
132.13
133.20
134.20
135.11
135.98
-45.53
-44.59
-43.83
-43.17
-42.59
0.4066
131.97
133.03
133.99
134.92
135.77
-45.57
-44.63
-43.86
-43.20
-42.63
0.4996
131.85
132.89
133.88
134.74
135.61
-45.59
-44.65
-43.88
-43.22
-42.64
0.5649
131.76
132.81
134.00
134.65
135.50
-45.60
-44.66
-43.88
-43.23
-42.65
0.6832
131.55
132.60
133.61
134.46
135.31
-45.62
-44.67
-43.90
-43.24
-42.66
0.7664
131.43
132.44
133.54
134.35
135.21
-45.63
-44.68
-43.91
-43.25
-42.67
0.8996
131.26
132.22
133.39
134.19
135.00
-45.64
-44.69
-43.92
-43.26
-42.68
Butyl Acetate + 0.3042 molkg-1 [bmim][Br]
a
0.0608
132.40
133.42
135.14
135.78
136.84
-45.47
-44.54
-43.70
-43.05
-42.39
0.1130
132.29
133.32
134.91
135.69
136.68
-45.82
-44.88
-44.03
-43.38
-42.71
0.1907
132.20
133.20
135.14
135.53
136.51
-45.98
-45.04
-44.18
-43.53
-42.86
0.3115
132.04
133.07
134.81
135.23
136.30
-46.07
-45.13
-44.26
-43.61
-42.94
0.3909
132.06
132.93
134.62
135.12
136.15
-46.10
-45.15
-44.29
-43.63
-42.96
0.4949
131.88
132.79
134.41
134.86
135.91
-46.12
-45.18
-44.31
-43.66
-42.98
0.5852
131.79
132.70
134.31
134.73
135.82
-46.13
-45.19
-44.32
-43.67
-42.99
0.6758
131.69
132.60
133.94
134.52
135.57
-46.15
-45.20
-44.33
-43.68
-43.00
0.8069
131.57
132.46
133.73
134.28
135.38
-46.16
-45.21
-44.34
-43.69
-43.01
0.8989
131.52
132.32
133.50
134.05
135.26
-46.16
-45.22
-44.35
-43.70
-43.02
m is the molality of alkyl acetate
6
Table S3
Values of Limiting apparent molar volumes, V0 , experimental slopes, SV, limiting apparent molar adiabatic compressibility K 0 and
experimental slope S K , of alkyl acetates in aqueous solutions of [bmim][Br] at different temperatures.
a
m/ molkg -1
T/K
V0  10 6/ m3 mol-1
SV  106/ m3∙kg mol-3/2
K 0  10 6/ m3 mol-1GPa-1
S K  106/ kgm3mol-2 GPa-1
Methyl acetate
0.0000
0.1019
0.3042
288.15
76.01(0.023)
0.21(0.042)
-46.11(0.066)
-0.53(0.120)
293.15
77.13(0.015)
0.12(0.027)
-45.17(0.064)
-0.50(0.116)
298.15
78.10(0.013)
0.03(0.023)
-44.33(0.063)
-0.48(0.115)
303.15
78.86(0.010)
0.22(0.018)
-43.57(0.062)
-0.46(0.114)
308.15
79.47 (0.013)
0.62(0.024)
-43.01(0.622)
-0.43(0.114)
288.15
75.95( 0.007)
0.42(0.014)
-45.21(0.102)
-0.74 (0.192)
293.15
76.83(0.013)
0.42(0.014)
-44.28(0.101)
-0.69(0.190)
298.15
77.85(0.003)
0.79(0.006)
-43.52(0.099)
-0.67(0.186)
303.15
79.04(0.005)
0.90(0.010)
-42.87(0.098)
-0.63(0.185)
308.15
79.56(0.008)
1.14(0.015)
-42.40(0.098)
-0.62(0.184)
28815
76.06(0.006)
0.64(0.012)
-45.83(0.067)
-0.59(0.127)
293.15
76.94(0.008)
0.52(0.016)
-44.90(0.066)
-0.57(0.124)
298.15
77.93(0.009)
0.28(0.016)
-44.05(0.064)
-0.55(0.122)
303.15
78.78(0.010)
0.33(0.018)
-43.39(0.064)
-0.53(0.121)
7
308.15
79.69(0.009)
0.48(0.018)
-42.73(0.063)
-0.50(0.120)
Ethyl acetate
0.0000
0.1019
0.3042
288.15
96.77(0.006)
0.04(0.011)
-46.08(0.066)
-0.47(0.121)
293.15
97.67(0.006)
0.21(0.011)
-45.15(0.065)
-0.44(0.119)
298.15
98.89(0.010
0.04(0.018)
-44.30(0.064)
-0.42(0.117)
303.15
99.60(0.012)
0.38(0.022)
-43.55(0.064)
-0.40(0.116)
308.15
100.45(0.007)
0.58(0.013)
-42.99(0.063)
-0.38(0.116)
288.15
95.66(0.011)
2.10(0.021)
-45.20(0.115)
-0.65(0.216)
293.15
96.73(0.013)
2.22 (0.024)
-44.27(0.113)
-0.61(0.212)
298.15
97.54(0.015)
2.32 (0.029)
-43.51(0.113)
-0.60(0.213)
303.15
98.02(0.011)
2.77(0.021)
-42.86(0.111)
-0.58(0.208)
308.15
98.72(0.008)
2.92(0.015)
-42.39(0.111)
-0.57(0.210)
288.15
96.89(0.009)
0.21(0.017)
-45.66(0.129)
-0.77(0.243)
293.15
97.86(0.011)
0.17(0.020)
-44.73(0.126)
-0.75(0.239)
298.15
98.88(0.010)
0.19(0.020)
-43.88(0.124)
-0.72(0.235)
303.15
99.88(0.020)
0.31(0.038)
-43.23(0.123)
-0.69(0.232)
308.15
101.05(0.016)
0.42(0.030)
-42.57(0.122)
-0.66(0.230)
Butyl acetate
0.0000
288.15
132.54(0.009)
-1.22(0.017)
-46.07(0.066)
-0.44(0.120)
293.15
133.60(0.013)
-1.48(0.023)
-45.14(0.064)
-0.43(0.117)
8
0.1019
0.3042
a
298.15
134.76(0.016)
-1.64(0.028)
-44.29(0.063)
-0.41(0.116)
303.15
135.57(0.010)
-1.41(0.018)
-43.54(0.062)
-0.40(0.137)
308.15
136.82(0.006)
-2.02(0.010)
-42.97(0.061)
-0.40(0.111)
288.15
132.59(0.010)
-1.50(0.020)
-45.18(0.103)
-0.67(0.198)
293.15
133.66(0.015)
-1.57(1.575)
-44.25(0.101)
-0.64(0.194)
298.15
134.58(0.042)
-1.33(0.080)
-43.49(0.100)
-0.62(0.192)
303.15
135.59(0.018)
-1.62(0.034)
-42.84(0.099)
-0.61(0.189)
308.15
136.53(0.026)
-1.76(0.050)
-42.26(0.098)
-0.60(0.187)
288.15
132.41(0.022)
-1.04(0.042)
-45.75(0.089)
-0.58(0.168)
293.15
133.46(0.016)
-1.27(0.030)
-44.82(0.087)
-0.57(0.164)
298.15
135.34(0.073)
-1.96(0.138)
-43.97(0.084)
-0.54(0.159)
303.15
135.90(0.015)
-2.05 (0.028)
-43.31(0.083)
-0.55(0.157)
308.15
136.89(0.025)
-1.87(0.047)
-42.65(0.083)
-0.55(0.157)
m is the molality of [bmim][Br]
9
Table S4
Partial molar volume of transfer, V0 and partial molar isentropic compressibility of
transfer, K0,S of alkyl acetates in aqueous solutions of [bmim][Br] at different temperatures.
a
m/ molkg -1
T/K
V0  106 / (m3mol-1)
K0,S  106 / (m3mol-1GPa-1)
Methyl acetate
0.1019
0.3042
288.15
-0.06
0.899
293.15
-0.30
0.894
298.15
-0.25
0.806
303.15
0.18
0.704
308.15
0.09
0.612
288.15
0.05
0.272
293.15
-0.19
0.273
298.15
-0.17
0.277
303.15
-0.08
0.178
308.15
0.22
0.278
Ethyl acetate
0.1019
0.3042
288.15
-1.12
0.879
293.15
-0.93
0.878
298.15
-1.35
0.797
303.15
-1.58
0.686
308.15
-1.72
0.601
288.15
0.11
0.423
293.15
0.19
0.423
298.15
-0.01
0.422
303.15
0.28
0.322
308.15
0.60
0.421
Butyl acetate
0.1019
288.15
0.05
0.894
293.15
0.07
0.891
298.15
-0.18
0.802
303.15
0.02
0.700
308.15
-0.29
0.705
10
0.3042
a
288.15
-0.12
0.320
293.15
-0.14
0.320
298.15
0.58
0.328
303.15
0.34
0.227
308.15
0.07
0.321
m is the molality of [bmim][Br]
11
Table S5
Limiting apparent molar expansivity  E0 , coefficient of thermal expansion  , and
temperature derivative of limiting apparent molar expansivity(  2V0 / T 2 ) at T = 298.15 K.
a
m/ molkg -1
  103 / (K-1)
 E0  106 / (m3.mol-1.K-1)
( 2V0 / T 2 ) / (m3∙mol-1)
Methyl acetate
0.0000
0.1731
0.290
-0.0070
0.1019
-0.0218
0.306
-0.0032
0.3042
-0.0024
0.285
-0.0005
Ethyl acetate
0.0000
0.1854
0.286
-0.0035
0.1019
0.1485
0.284
-0.0061
0.3042
0.2069
0.294
0.0022
Butyl acetate
a
0.0000
0.2106
0.271
0.0002
0.1019
0.1957
0.281
-0.0010
0.3042
0.2281
0.277
-0.0082
m is the molality of [bmim][Br]
12