acetylenic C-H |
Stretch for sp-hybridized C-H occurs at values near 3300 cm-1. |
C,C triple bond |
Stretch occurs near 2150 cm-1; conjugation moves stretch to lower frequency. Disubstituted or symetrically substituted triple bonds give either no absorption or weak absorption. |
acetylenic C-H |
Bend for sp-hybridized C-H occurs at values between 650-600 cm-1. |
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