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preface to fifteenth edition

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SPECTROSCOPY 7.115<br />

TABLE 7.64<br />

Nitrogen-15 Chemical Shifts in Monosubstituted Pyridine<br />

317.3 i<br />

Substituent C-2 C-3 C-4<br />

9CH 3 0.4 0.3 8.0<br />

9CH 2 CH 3 1.8 6.6<br />

9CH(CH 3 ) 2 5.1 5.9<br />

9C(CH 3 ) 3 2.5 5.8<br />

9CN 0.9 0.8 10.6<br />

9CHO 10 11 29<br />

9CO9CH 3 9 15 11<br />

9CO9OCH 2 CH 3 11.8 5<br />

9OCH 3 49 0 23<br />

9OH 126 2 118<br />

9NO 2 23 1 22<br />

9NH 2 45 10 46<br />

9F 42 18<br />

9Cl 4 4 6<br />

9Br 2 8 7<br />

TABLE 7.65 Nitrogen-15 Chemical Shifts for Standards<br />

Values given in ppm, relative <strong>to</strong> NH 3 liquid at 23C.<br />

Substance , ppm Conditions<br />

Nitromethane (neat) 380.2 For organic solvents and acidic aqueous<br />

solutions<br />

Potassium (or sodium) nitrate (saturated 376.5 For neutral and basic aqueous solutions<br />

aqueous solution)<br />

C(NO 2 ) 4 331 For nitro compounds<br />

(CH 3 ) 2 9CHO (neat) 103.8 For organic solvents and aqueous solutions<br />

(C 2 H 5 ) 4 N Cl 64.4 Saturated aqueous solution<br />

(CH 3 ) 4 N Cl 43.5 Saturated aqueous solution<br />

NH 4 Cl 27.3 Saturated aqueous solution<br />

NH 4 NO 3 20.7 Saturated aqueous solution<br />

NH 3 0.0 Liquid, 25C<br />

15.9 Vapor, 5 atm<br />

TABLE 7.66<br />

Nitrogen-15 <strong>to</strong> Hydrogen-1 Spin Coupling Constants<br />

Structure J, Hz Structure J, Hz<br />

R9NH 2 and R 2 NH 61–67<br />

Aryl9NH 2 78<br />

p-CH 3 O9aryl9NH 2 79<br />

p-O 2 N9aryl9NH 2 90–93<br />

Amine salts (alkyl and aryl) 73–76<br />

Aryl9NHOH 79<br />

Aryl9NHCH 3 87<br />

Aryl9NHCH 2 F 90<br />

Aryl9NHNH 2 90<br />

p-O 2 N9aryl9NHNH 2 99<br />

Aryl9SO 2 9NH 2 81<br />

Aryl9SO 2 9NHR 86<br />

O<br />

H<br />

H syn<br />

(<strong>to</strong> 9CO9)<br />

H anti<br />

88<br />

92–93<br />

C9N

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