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preface to fifteenth edition

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7.78 SECTION 7<br />

TABLE 7.33<br />

Raman Frequencies of Carbonyl Bands<br />

Abbreviations Used in the Table<br />

m, moderately strong s–vs, strong <strong>to</strong> very strong<br />

m–s, moderate <strong>to</strong> strong vs, very strong<br />

s, strong w, weak<br />

Group Band, cm1<br />

Remarks<br />

Acid anhydrides<br />

9CO9O9CO9<br />

Saturated<br />

1850–1780 (m)<br />

1771–1770 (m)<br />

Conjugated, noncyclic 1775<br />

1720<br />

Acid fluorides 9CO9F<br />

Alkyl 1840–1835<br />

Aryl 1812–1800<br />

Acid chlorides 9CO9Cl<br />

Alkyl<br />

1810–1770 (s)<br />

Aryl 1774<br />

1731<br />

Acid bromides 9CO9Br<br />

Alkyl 1812–1788<br />

Aryl 1775–1754<br />

Acid iodides 9CO9I<br />

Alkyl ca 1806<br />

Aryl ca 1752<br />

Lac<strong>to</strong>nes<br />

1850–1730 (s)<br />

Esters<br />

Saturated 1741–1725 Alkyl branching on carbon adjacent <strong>to</strong> C"O<br />

1<br />

lowers frequency by 5–15 cm .<br />

Aryl and ,-unsaturated 1727–1714<br />

Diesters<br />

Oxalates 1763–1761<br />

Phthalates 1738–1728<br />

C#C9CO9O9 1716–1708<br />

Carbamates 1694–1688<br />

Aldehydes<br />

Ke<strong>to</strong>nes<br />

Saturated<br />

Aryl<br />

Alicyclic<br />

n 4<br />

n 5<br />

n 6<br />

1740–1720 (s–vs)<br />

1725–1700 (vs)<br />

1700–1650 (m)<br />

1782 (m)<br />

1744 (m)<br />

1725–1699 (m)

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