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preface to fifteenth edition

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SPECTROSCOPY 7.85<br />

TABLE 7.36<br />

Raman Frequencies of Sulfur Compounds (Continued)<br />

GroupBand, cm<br />

1<br />

Remarks<br />

C9S9 752 (vs), 731 (vs) With vinyl groupattached<br />

742–722 (m–s) With CH 3 attached<br />

698 (w), 678 (s) With allyl groupattached<br />

693–639 (s) Ethyl or longer alkyl chain<br />

651–610 (s–vs) Isopropyl group attached<br />

589–585 (vs) tert-Butyl groupattached<br />

(CH 2<br />

) n<br />

S<br />

n 2 1112<br />

n 4 688<br />

n 5 659<br />

C9(S9S) n<br />

9C 715–620 (vs) Two bands; CS stretching<br />

525–510 (vs) Two bands; SS stretching<br />

Didi-n-alkyl disulfides 576 (s) CS stretching<br />

Di-tert-butyl disulfide 543 (m) SS stretching<br />

Trisulfides 510–480 (s) SS stretching<br />

TABLE 7.37<br />

Raman Frequencies of Ethers<br />

Abbreviations Used in the Table<br />

m, moderately strong var, of variable strength<br />

s, strong vs, very strong<br />

GroupBand, cm<br />

1<br />

Remarks<br />

C9O9C<br />

Aliphatic 1200–1070 (m) Asymmetrical COC stretching. Symmetrical<br />

substitution gives higher frequencies<br />

930–830 (s) Symmetrical COC stretching<br />

800–700 (s) Braching at carbon gives higher frequencies.<br />

550–400<br />

Aromatic<br />

1310–1210 (m)<br />

1050–1010 (m)<br />

C9O9C9O9C<br />

1145–1129 (m)<br />

900–800 (vs)<br />

537–370 (s)<br />

396–295<br />

C<br />

O<br />

C<br />

1280–1240 (s) Ring breathing<br />

9O9O9<br />

800–770 (var)

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