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preface to fifteenth edition

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7.98 SECTION 7<br />

TABLE 7.46<br />

Pro<strong>to</strong>n Spin Coupling Constants (Continued)<br />

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

C"C<br />

F CH 3<br />

2–4<br />

H<br />

C"C<br />

CF<br />

0–6<br />

HC#CF 21<br />

F a<br />

F e<br />

a–a 34<br />

a–e<br />

H e e–e <br />

12<br />

5–8<br />

e–e<br />

H a<br />

TABLE 7.47 Pro<strong>to</strong>n Chemical Shifts of Reference Compounds<br />

Relative <strong>to</strong> tetramethylsilane.<br />

* DMSO, dimethyl sulfoxide.<br />

Compound , ppm Solvent(s)<br />

Sodium acetate 1.90 D 2 O<br />

1,2-Dibromoethane 3.63 CDCl 3<br />

1,1,2,2-Tetrachloroethane 5.95 CDCl 3 ; CCl 4<br />

1,4-Benzoquinone 6.78 CDCl 3 ; CCl 4<br />

1,4-Dichlorobenzene 7.23 CCl 4<br />

1,3,5-Trinitrobenzene 9.21 DMSO-d 6 *<br />

9.55 CHCl 3<br />

TABLE 7.48 Solvent Positions of Residual Pro<strong>to</strong>ns in IncompletelyDeuterated Solvents<br />

Relative <strong>to</strong> tetramethylsilane.<br />

Solvent Group , ppm<br />

Acetic-d 3 acid-d 1<br />

Methyl<br />

Hydroxyl<br />

2.05<br />

11.5*<br />

Ace<strong>to</strong>ne-d 6 Methyl 2.057<br />

Ace<strong>to</strong>nitrile-d 3 Methyl 1.95<br />

Benzene-d 6 Methine 6.78<br />

tert-Butanol-d 1 (CH 3 ) 3 COD Methyl 1.28<br />

Chloroform-d 1 Methine 7.25<br />

Cyclohexane-d 12 Methylene 1.40<br />

Deuterium oxide Hydroxyl 4.7*<br />

Dimethyl-d 6 -formamide-d 1<br />

Methyl<br />

Formyl<br />

2.75; 2.95<br />

8.05<br />

Dimethyl-d 6 sulfoxide<br />

Methyl<br />

Absorbed water<br />

2.51<br />

3.3*<br />

1,4-Dioxane-d 8 Methylene 3.55<br />

Hexamethyl-d 18 -phosphoramide Methyl 2.60<br />

Methanol-d 4<br />

Methyl<br />

Hydroxyl<br />

3.35<br />

4.8*<br />

Dichloromethane-d 2 Methylene 5.35<br />

* These values mayvarygreatly, depending upon the solute and its concentration.

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