preface to fifteenth edition

7.112 SECTION 7
TABLE 7.62
Boron-11 Chemical Shifts (Continued)
Structure , ppm Structure , ppm
Addition complexes
R 2 O·BH 3 18–19
R 3 N·BH 3 25
R 2 NH·BH 3 33
N BH 3
31
R 2 O(or ROH)·BF 3 17–19
R 2 O(or ROH)·BCl 3
7to8
R 2 O(or ROH)·BBr 3 23–24
R 2 O(or ROH)·BI 3 74–82
Boranes
B 2 H 6 1
B 4 H 10
(BH 2 ) 25
(BH) 60
Base
Apex
B 5 H 9 31 70
B 5 H 11 16 50
B 10 H 14 7 54
N BBr 3
24
TABLE 7.63 Nitrogen-15 (or Nitrogen-14) Chemical Shifts
Values given in ppm on the scale, relative to NH 3 liquid.
Substituent group , ppm Substituent group , ppm
Aliphatic amines
Primary 1–59
Secondary 7–81
Tertiary 14–44
Cyclo, primary 29–44
Aryl amines 40–100
Aryl hydrazines 40–100
Piperidines, decahydroquinolines
30–82
Amine cations
Primary 19–59
Secondary 40–74
Tertiary 30–67
Quaternary 43–70
Enamines, tertiary type
Alkyl 29–82
Cycloalkyl 55–104
Aminophosphines 59–100
Amine N-oxides 95–122
Ureas
Aliphatic 63–84
Aryl 105–108
Sulfonamides 79–164
Amides
HCO9NHR
R primary 100–115
R secondary 104–148
R tertiary 96–133
Amides (continued)
HCO9NH9Aryl 138–141
RCO9NHR or RCO9NR 2 103–130
RCO9NH9Aryl 131–136
Aryl9CO9H9Aryl ca 126
Guanidines
Amino 30–60
Imino 166–207
Thioureas 85–111
Thioamides 135–154
Cyanamides
R 2 N9
12 to 38
9CN 175–200
Carbodiimides 95–120
Isocyanates
Alkyl, primary 14–32
Alkyl, secondary and tertiary 54–57
Aryl ca 46
Isothiocyanates 90–107
Azides 52–80
108–122
240–260
Lactams 113–122
Hydrazones
Amino 141–167
Imino 319–327
Cyanates 155–182
Nitrile N-oxides, fulminates 195–225