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. 2012 Aug 31;8:1406–1442. doi: 10.3762/bjoc.8.163

Table 1.

MCA values for N-centered Lewis bases, ordered by increasing MCA values.

system MCA [kJ/mol] system MCA [kJ/mol]

NH3 (2) +436.5 NH2Me (3) +488.7
NMePh2 (4) +514.4 pyridine (1) +518.7
Nc-Pr3 (5) +521.2 Inline graphic
(6)
+521.4
NHMe2 (7) +523.1 NMec-Pr2 (8) +523.7
NMe2Ph (9) +527.7 Inline graphic
(10)
+529.4
Inline graphic
(11)
+531.1 Inline graphic
(12)
+531.7a
NMe2c-Pr (13) +532.0 Inline graphic
(14)
+532.8
Inline graphic
(15)
+535.9 N(iPr)3 (16) +536.0
Inline graphic
(17)
+538.2 Inline graphic
(18)
+539.8
Inline graphic
(19)
+541.5 NMe3 (20) +543.5
Nt-Bu3 (21) +545.5 NMe2Et (22) +548.6
NMet-Bu2 (23) +549.4 Inline graphic
(24)
+550.0
NMe2c-Bu (25) +551.2 NMe2(iPr) (26) +551.7
NMe2n-Pr (27) +552.1 Inline graphic
(28)
+552.5
NMe2t-Bu (29) +552.6 NMe2n-Bu (30) +553.8
NMe2c-Pen (31) +554.3 NMe2n-Pen (32) +554.5
NMe2c-Oct (33) +554.6 Inline graphic
(34)
+555.2
NMeEt2 (35) +555.3 NMe2n-Hex (36) +555.4
NMe2n-Hep (37) +555.7 Nc-Hex3 (38) +556.9
NMe(iPr)2 (39) +557.3 NMe2c-Hep (40) +560.3
NMec-Bu2 (41) +560.4 NMe2c-Hex (42) +561.1
NMen-Pr2 (43) +561.7 Inline graphic
(44)
+562.2
NEt3 (45) +562.3 NMen-Bu2 (46) +564.1
Nn-Pr3 (47) +567.5 Nc-Pen3 (48) +568.3
NMec-Pen2 (49) +570.6 Nc-Bu3 (50) +570.9
NMec-Hex2 (51) +572.0 Inline graphic
(52)
+576.0
Inline graphic
(53)
+580.6 Inline graphic
(54)
+581.2b
NPh3 (55) +583.5 Inline graphic
(56)
+590.1b
Inline graphic
(57)
+602.7 Inline graphic
(58)
+609.0
Inline graphic
(59)
+609.1 Inline graphic
(60)
+609.6c
Inline graphic
(61)
+611.0 Inline graphic
(62)
+613.3
Inline graphic
(63)
+616.0 Inline graphic
(64)
+620.8
Inline graphic
(65)
+624.1b,d

aN3; bpyridine nitrogen; cN(sp²); dsee [7].