Mayr's Database of Reactivity Parameters

Nucleophiles

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Name Solvent Reactivity
Parameters
Classification Reference
(title or year)
4-(1-azidovinyl)-1,1'-biphenyl
C14H11N3 *
dichloromethane

N  Param.: 5.17

sN Param.: 0.86
*** Chem. Commun. 2026, 62, 5041-5045
10.1039/d6cc00190d
4-(2-(fluorodiphenylmethyl)pyrrolidin-1-yl)pyridine
C22H21FN2 *
dichloromethane

N  Param.: 14.57

sN Param.: 0.75
*** Eur. J. Org. Chem. 2014, , 1202-1211
10.1002/ejoc.201301730
4-(bis(trimethylsiloxy)amino)pent-4-enoic acid methyl ester
C12H27NO4Si2 *
dichloromethane

N  Param.: 3.84

sN Param.: 0.87
*** J. Org. Chem. 2001, 66, 3196-3200
10.1021/jo0015927
4-(dimethylamino)pyridine (in 91M9AN)
C7H10N2 *
MeOH-MeCN mix

N  Param.: 13.20

sN Param.: 0.67
* Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-(dimethylamino)pyridine (in CH2Cl2)
C7H10N2 *
dichloromethane

N  Param.: 15.80

sN Param.: 0.66
*** Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-(dimethylamino)pyridine (in DMF)
C7H10N2 *
DMF

N  Param.: 14.90

sN Param.: 0.67
* Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-(dimethylamino)pyridine (in DMSO)
C7H10N2 *
DMSO

N  Param.: 14.80

sN Param.: 0.67
* Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-(dimethylamino)pyridine (in H2O)
C7H10N2 *
water

N  Param.: 13.19

sN Param.: 0.56
*** Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-(dimethylamino)pyridine (in MeCN)
C7H10N2 *
MeCN

N  Param.: 15.51

sN Param.: 0.62
*** J. Phys. Chem. A 2012, 116, 8494-8499
10.1021/jp3049247
4-(dimethylamino)pyridine (in THF)
*
THF

N  Param.: 15.90

sN Param.: 0.66
*** Angew. Chem. Int. Ed. 2011, 50, 6915-6919
10.1002/anie.201102435
4-(morpholino)pyridine (in CH2Cl2)
C9H12N2O *
dichloromethane

N  Param.: 14.59

sN Param.: 0.69
*** Eur. J. Org. Chem. 2016, , 4050-4058
10.1002/ejoc.201600572
4-(morpholino)pyridine (in MeCN)
*
MeCN

N  Param.: 14.80

sN Param.: 0.63
*** J. Phys. Chem. A 2012, 116, 8494-8499
10.1021/jp3049247
4-(trifluoromethyl)thiophenolate (in DMSO)
C7H4F3S- *
DMSO

N  Param.: 21.30

sN Param.: 0.86
*** J. Org. Chem. 2021, 86, 5965-5972
10.1021/acs.joc.1c00025
4-(trimethylsilyl)but-1-en-3-ynyl-Co2(CO)5(PPh3)
*
dichloromethane

N  Param.: -0.76

sN Param.: 0.90
* Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
4-(trimethylsilyl)but-1-en-3-ynyl-Co2(CO)6
*
dichloromethane

N  Param.: -1.11

sN Param.: 0.92
*** J. Am. Chem. Soc. 2001, 123, 9500-9512
10.1021/ja010890y
4-acetamido-pyridine (in MeCN)
*
MeCN

N  Param.: 13.24

sN Param.: 0.67
*** J. Phys. Chem. A 2012, 116, 8494-8499
10.1021/jp3049247
4-amino-3,5-dibromo-pyridine (in MeCN)
*
MeCN

N  Param.: 11.11

sN Param.: 0.75
*** J. Phys. Chem. A 2012, 116, 8494-8499
10.1021/jp3049247
4-aminopyridine (in CH2Cl2)
C5H6N2 *
dichloromethane

N  Param.: 15.20

sN Param.: 0.67
* Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-aminopyridine (in H2O)
C5H6N2 *
water

N  Param.: 12.19

sN Param.: 0.66
*** Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-bromothiophenolate (in DMSO)
C6H4BrS- *
DMSO

N  Param.: 22.80

sN Param.: 0.78
*** J. Org. Chem. 2021, 86, 5965-5972
10.1021/acs.joc.1c00025
4-chloroaniline (in MeCN)
C6H6ClN *
MeCN

N  Param.: 12.92

sN Param.: 0.60
*** J. Org. Chem. 2007, 72, 3679-3688
10.1021/jo062586z
4-chloropyridine (in CH2Cl2)
C5H4ClN *
dichloromethane

N  Param.: 11.70

sN Param.: 0.67
* Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-chloropyridine (in H2O)
C5H4ClN *
water

N  Param.: 10.50

sN Param.: 0.73
* Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-cyanophenyl isocyanide
C8H4N2 *
dichloromethane

N  Param.: 3.57

sN Param.: 0.72
** Angew. Chem. Int. Ed. 2007, 46, 3563-3566
10.1002/anie.200605205
4-fluoroperoxybenzoate (in H2O)
C7H4FO3 *
water

N  Param.: 17.99

sN Param.: 0.47
*** Angew. Chem. Int. Ed. 2017, 56, 13279-13282
10.1002/anie.201707086
4-formyl-imidazole anion (in DMSO)
*
DMSO

N  Param.: 16.40

sN Param.: 0.67
*** Chem. Eur. J. 2012, 18, 127-137
10.1002/chem.201102411
4-methoxy-indole
C9H9NO *
MeCN

N  Param.: 5.41

sN Param.: 1.10
* J. Org. Chem. 2006, 71, 9088-9095
10.1021/jo0614339
4-methoxyaniline (in MeCN)
C7H9NO *
MeCN

N  Param.: 13.42

sN Param.: 0.73
*** J. Org. Chem. 2007, 72, 3679-3688
10.1021/jo062586z
4-methoxyaniline (in water)
C7H9NO *
water

N  Param.: 14.28

sN Param.: 0.68
*** ChemPlusChem 2015, 80, 1673-1679
10.1002/cplu.201500246
4-methoxyperoxybenzoate (in H2O)
C8H7O4 *
water

N  Param.: 17.84

sN Param.: 0.46
*** Angew. Chem. Int. Ed. 2017, 56, 13279-13282
10.1002/anie.201707086
4-methoxypyridine (in CH2Cl2)
C6H7NO *
dichloromethane

N  Param.: 13.70

sN Param.: 0.67
* Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-methoxypyridine (in H2O)
C6H7NO *
water

N  Param.: 11.44

sN Param.: 0.68
*** Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-methoxythiophenolate (in DMSO)
C7H7OS- *
DMSO

N  Param.: 24.97

sN Param.: 0.68
*** J. Org. Chem. 2021, 86, 5965-5972
10.1021/acs.joc.1c00025
4-methyl-2,5-heptadiene
C8H14 *
dichloromethane

N  Param.: -0.73

sN Param.: 0.97
* J. Am. Chem. Soc. 2002, 124, 4076-4083
10.1021/ja0121538
4-methyl-5-(trimethylsiloxy)-2,3-dihydrofuran
C8H16O2Si *
dichloromethane

N  Param.: 11.50

sN Param.: 0.91
*** Eur. J. Org. Chem. 2004, , 2791-2796
10.1002/ejoc.200400134
4-methyl-imidazole (in MeCN)
*
MeCN

N  Param.: 11.79

sN Param.: 0.77
*** Org. Biomol. Chem. 2010, 8, 1929-1935
10.1039/c000965b
4-methyl-imidazole anion (in DMSO)
*
DMSO

N  Param.: 21.29

sN Param.: 0.51
*** Chem. Eur. J. 2012, 18, 127-137
10.1002/chem.201102411
4-methyl-N-(2-phenylethynyl)-N-(phenylmethyl)benzenesulfonamide
C22H19NO2S *
dichloromethane

N  Param.: 3.85

sN Param.: 0.84
*** Angew. Chem. Int. Ed. 2014, 53, 4968-4971
10.1002/anie.201402055
4-methyl-penta-1,3-diene
C6H10 *
dichloromethane

N  Param.: 2.60

sN Param.: 1.00
* Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
4-methyl-quinoline alias lepidine (in MeCN)
*
MeCN

N  Param.: 11.60

sN Param.: 0.62
*** J. Org. Chem. 2009, 74, 7157-7164
10.1021/jo901670w
4-methylpiperazin-1-yl dithiocarbamate (in MeCN)
*
MeCN

N  Param.: 23.61

sN Param.: 0.57
*** Org. Biomol. Chem. 2011, 9, 8046-8050
10.1039/c1ob06245j
4-methylpyridine (in CH2Cl2)
C6H7N *
dichloromethane

N  Param.: 13.70

sN Param.: 0.67
* Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-methylpyridine (in H2O)
C6H7N *
water

N  Param.: 11.10

sN Param.: 0.75
*** Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-methylthiophenolate (in DMSO)
C7H7S- *
DMSO

N  Param.: 24.35

sN Param.: 0.69
*** J. Org. Chem. 2021, 86, 5965-5972
10.1021/acs.joc.1c00025
4-nitro-imidazole anion (in DMSO)
*
DMSO

N  Param.: 14.81

sN Param.: 0.71
*** Chem. Eur. J. 2012, 18, 127-137
10.1002/chem.201102411
4-nitro-imidazole anion (in water)
*
water

N  Param.: 11.37

sN Param.: 0.53
*** Chem. Eur. J. 2012, 18, 127-137
10.1002/chem.201102411
4-nitroperoxybenzoate (in H2O)
C7H4NO5 *
water

N  Param.: 17.43

sN Param.: 0.50
*** Angew. Chem. Int. Ed. 2017, 56, 13279-13282
10.1002/anie.201707086
4-nitrothiophenolate (in DMSO)
C6H4NO2S- *
DMSO

N  Param.: 18.92

sN Param.: 0.87
*** J. Org. Chem. 2021, 86, 5965-5972
10.1021/acs.joc.1c00025
4-pyridone anion (in DMSO)
*
DMSO

N  Param.: 18.97

sN Param.: 0.62
*** J. Am. Chem. Soc. 2010, 132, 15380-15389
10.1021/ja106962u
4-pyridone anion (in MeCN)
*
MeCN

N  Param.: 20.22

sN Param.: 0.49
*** J. Am. Chem. Soc. 2010, 132, 15380-15389
10.1021/ja106962u
4-pyridone anion (in water)
*
water

N  Param.: 14.76

sN Param.: 0.48
*** J. Am. Chem. Soc. 2010, 132, 15380-15389
10.1021/ja106962u
4-pyrrolidinopyridine (in CH2Cl2)
C9H12N2 *
dichloromethane

N  Param.: 15.90

sN Param.: 0.67
* Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-pyrrolidinopyridine (in H2O)
C9H12N2 *
water

N  Param.: 12.39

sN Param.: 0.66
*** Chem. Eur. J. 2007, 13, 336-345
10.1002/chem.200600941
4-pyrrolidinopyridine (in MeCN)
C9H12N2 *
MeCN

N  Param.: 14.99

sN Param.: 0.69
*** Chem. Eur. J. 2013, 19, 6435-6442
10.1002/chem.201204452
40% water/60%EtOH (v/v)
*
water-EtOH mix

N  Param.: 6.28

sN Param.: 0.87
*** J. Am. Chem. Soc. 2004, 126, 5174-5181
10.1021/ja031828z
40% water/60%TFE (v/v)
H2O *
water-TFE mix

N  Param.: 3.42

sN Param.: 0.90
*** J. Am. Chem. Soc. 2004, 126, 5174-5181
10.1021/ja031828z
5% water/95% HFIP (w/w)
*
water-HFIP mix

N  Param.: -0.10

sN Param.: 0.97
*** J. Phys. Org. Chem. 2013, 26, 59-63
10.1002/poc.3064
5,6-dimethyl-benzimidazole (in DMSO)
*
DMSO

N  Param.: 11.08

sN Param.: 0.71
*** Org. Biomol. Chem. 2010, 8, 1929-1935
10.1039/c000965b
5-(4-(dimethylamino)benzyl)-2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ide
C15H18NO4 *
MeCN

N  Param.: 7.15

sN Param.: 0.81
*** Chem. Eur. J. 2014, 20, 11069-11077
10.1002/chem.201403161
5-(4-(dimethylamino)benzyl)-2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ide (in DMSO)
C15H18NO4 *
DMSO

N  Param.: 14.48

sN Param.: 0.86
*** Chem. Eur. J. 2014, 20, 11069-11077
10.1002/chem.201403161
5-(4-(methoxy)benzyl)-2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ide
C14H15O5 *
MeCN

N  Param.: 6.21

sN Param.: 0.68
*** Chem. Eur. J. 2014, 20, 11069-11077
10.1002/chem.201403161
5-(4-(methoxy)benzyl)-2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ide (in DMSO)
C14H15O5 *
DMSO

N  Param.: 15.13

sN Param.: 0.75
*** Chem. Eur. J. 2014, 20, 11069-11077
10.1002/chem.201403161
5-(4-cyanobenzyl)-2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ide (in DMSO)
C14H12NO4 *
DMSO

N  Param.: 13.79

sN Param.: 0.86
*** Chem. Eur. J. 2014, 20, 11069-11077
10.1002/chem.201403161
5-(tert-Butyl)-1,3-diisopropyl-4-methylene-4,5-dihydro-1H-1,2,3-triazol-3-ium-5-ide (in THF)
C13H25N3 *
THF

N  Param.: 31.92

sN Param.: 0.52
*** Angew. Chem. Int. Ed. 2023, 62, e202309790
10.1002/anie.202309790
5-(trimethylsiloxy)-2,3-dihydrofuran
C7H14O2Si *
dichloromethane

N  Param.: 12.56

sN Param.: 0.70
***** J. Am. Chem. Soc. 2001, 123, 9500-9512
10.1021/ja010890y
5-(trimethylsiloxy)-2,3-dihydrofuran (in MeCN)
*
MeCN

N  Param.: 12.34

sN Param.: 0.72
*** J. Am. Chem. Soc. 2013, 135, 6579-6587
10.1021/ja401106x
5-(triphenylsiloxy)-2,3-dihydrofuran
C22H20O2Si *
dichloromethane

N  Param.: 11.28

sN Param.: 0.91
*** Eur. J. Org. Chem. 2005, , 1760-1764
10.1002/ejoc.200400706
5-(tris(pentafluorophenyl)siloxy)-2,3-dihydrofuran
C22H5F15O2Si *
dichloromethane

N  Param.: 8.16

sN Param.: 0.67
*** Eur. J. Org. Chem. 2005, , 1760-1764
10.1002/ejoc.200400706
5-amino-indole
C8H8N2 *
MeCN

N  Param.: 7.22

sN Param.: 1.10
* J. Org. Chem. 2006, 71, 9088-9095
10.1021/jo0614339
5-benzyl-2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ide
C13H13O4 *
MeCN

N  Param.: 5.51

sN Param.: 0.70
*** Chem. Eur. J. 2014, 20, 11069-11077
10.1002/chem.201403161
5-benzyl-2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ide (in DMSO)
C13H13O4 *
DMSO

N  Param.: 15.02

sN Param.: 0.75
*** Chem. Eur. J. 2014, 20, 11069-11077
10.1002/chem.201403161
5-bromo-indole
C8H6BrN *
MeCN

N  Param.: 4.38

sN Param.: 1.10
* J. Org. Chem. 2006, 71, 9088-9095
10.1021/jo0614339
5-chloro-2-methylindole
C9H8ClN *
MeCN

N  Param.: 6.08

sN Param.: 1.10
* J. Org. Chem. 2006, 71, 9088-9095
10.1021/jo0614339
5-chloro-indole
C8H6ClN *
MeCN

N  Param.: 4.42

sN Param.: 1.10
* J. Org. Chem. 2006, 71, 9088-9095
10.1021/jo0614339
5-cyano-indole
C9H6N2 *
MeCN

N  Param.: 2.83

sN Param.: 1.10
* J. Org. Chem. 2006, 71, 9088-9095
10.1021/jo0614339
5-hydroxy-indole
C8H7NO *
MeCN

N  Param.: 6.44

sN Param.: 1.10
* J. Org. Chem. 2006, 71, 9088-9095
10.1021/jo0614339
5-methoxy-2-methylindole
C10H11NO *
MeCN

N  Param.: 7.26

sN Param.: 1.10
* J. Org. Chem. 2006, 71, 9088-9095
10.1021/jo0614339
5-methoxy-benzimidazole (in DMSO)
*
DMSO

N  Param.: 11.00

sN Param.: 0.71
* Org. Biomol. Chem. 2010, 8, 1929-1935
10.1039/c000965b
5-methoxy-indole
C9H9NO *
dichloromethane

N  Param.: 6.22

sN Param.: 1.12
*** J. Org. Chem. 2006, 71, 9088-9095
10.1021/jo0614339
5-methyl-2,3-dihydrofuran (in MeCN)
C5H8O *
MeCN

N  Param.: 7.65

sN Param.: 0.86
*** Angew. Chem. Int. Ed. 2026, 65, e24329
10.1002/anie.202524329
5-methyl-benzimidazole (in DMSO)
*
DMSO

N  Param.: 10.69

sN Param.: 0.79
*** Org. Biomol. Chem. 2010, 8, 1929-1935
10.1039/c000965b
5-methyl-indole
C9H9N *
MeCN

N  Param.: 6.00

sN Param.: 1.10
* J. Org. Chem. 2006, 71, 9088-9095
10.1021/jo0614339
50% ethanol/50% MeCN (v/v)
C2H6O *
EtOH-MeCN mix

N  Param.: 6.37

sN Param.: 0.90
*** J. Am. Chem. Soc. 2004, 126, 5174-5181
10.1021/ja031828z
50% methanol/50% MeCN (v/v)
CH4O *
MeOH-MeCN mix

N  Param.: 6.67

sN Param.: 0.90
*** J. Am. Chem. Soc. 2004, 126, 5174-5181
10.1021/ja031828z
50% water/50% HFIP (w/w)
*
water-HFIP mix

N  Param.: 1.50

sN Param.: 1.03
*** J. Phys. Org. Chem. 2013, 26, 59-63
10.1002/poc.3064
50% water/50% MeCN (v/v)
H2O *
water-MeCN mix

N  Param.: 5.05

sN Param.: 0.89
*** J. Am. Chem. Soc. 2004, 126, 5174-5181
10.1021/ja031828z
50% water/50%EtOH (v/v)
*
water-EtOH mix

N  Param.: 5.96

sN Param.: 0.89
*** J. Am. Chem. Soc. 2004, 126, 5174-5181
10.1021/ja031828z
50% water/50%TFE (v/v)
H2O *
water-TFE mix

N  Param.: 3.57

sN Param.: 0.89
*** J. Am. Chem. Soc. 2004, 126, 5174-5181
10.1021/ja031828z
6,6-dimethylfulvene
C8H10 *
MeCN

N  Param.: 3.93

sN Param.: 0.88
*** Eur. J. Org. Chem. 2009, , 1202-1206
10.1002/ejoc.200801099
6-((benzyloxy)methyl)-3,4-dihydro-2H-pyran (in MeCN)
C13H16O2 *
MeCN

N  Param.: 2.81

sN Param.: 0.57
*** Angew. Chem. Int. Ed. 2026, 65, e24329
10.1002/anie.202524329
6-(4-dimethylamino-phenyl)fulvene
C14H15N *
MeCN

N  Param.: 6.72

sN Param.: 0.87
*** Eur. J. Org. Chem. 2009, , 1202-1206
10.1002/ejoc.200801099
6-(julolidin-9-yl)fulvene
C18H19N *
MeCN

N  Param.: 7.79

sN Param.: 1.06
*** Eur. J. Org. Chem. 2009, , 1202-1206
10.1002/ejoc.200801099
6-methoxy-quinoline (in MeCN)
*
MeCN

N  Param.: 10.86

sN Param.: 0.66
*** J. Org. Chem. 2009, 74, 7157-7164
10.1021/jo901670w
6-methyl-3-(phenyl-l3-iodanylidene)dihydro-2H-pyran-2,4(3H)-dione (in CH2Cl2)
*
dichloromethane

N  Param.: 4.67

sN Param.: 0.92
*** J. Am. Chem. Soc. 2016, 138, 10304-10313
10.1021/jacs.6b05768
60% water/40%EtOH (v/v)
*
water-EtOH mix

N  Param.: 5.81

sN Param.: 0.90
*** J. Am. Chem. Soc. 2004, 126, 5174-5181
10.1021/ja031828z
60% water/40%TFE (v/v)
H2O *
water-TFE mix

N  Param.: 3.77

sN Param.: 0.88
*** J. Am. Chem. Soc. 2004, 126, 5174-5181
10.1021/ja031828z
67% ethanol/33% MeCN (v/v)
C2H6O *
EtOH-MeCN mix

N  Param.: 6.74

sN Param.: 0.89
*** J. Am. Chem. Soc. 2004, 126, 5174-5181
10.1021/ja031828z
67% methanol/33% MeCN (v/v)
CH4O *
MeOH-MeCN mix

N  Param.: 7.01

sN Param.: 0.91
*** J. Am. Chem. Soc. 2004, 126, 5174-5181
10.1021/ja031828z
67% water/33% MeCN (v/v)
H2O *
water-MeCN mix

N  Param.: 5.05

sN Param.: 0.90
*** J. Am. Chem. Soc. 2004, 126, 5174-5181
10.1021/ja031828z
7% water/93% HFIP (w/w)
*
water-HFIP mix

N  Param.: 0.34

sN Param.: 0.96
*** J. Phys. Org. Chem. 2013, 26, 59-63
10.1002/poc.3064