**Analysis:** * **917 cm⁻¹ & 995 cm⁻¹:** These sharp peaks in the 900-1000 cm⁻¹ region are characteristic of =C–H out-of-plane bending vibrations in alkenes. The specific pattern suggests a possible trisubstituted alkene. * **1036 cm⁻¹:** The strong, broad absorption is indicative of C–O stretching vibrations, commonly associated with primary or secondary alcohols, or possibly ethers. * **1414 cm⁻¹:** The weak, broad band is in the region for O–H in-plane bending (of carboxylic acids) or C–H bending (scissoring) vibrations. * **2924 cm⁻¹:** The weak, broad feature corresponds to C–H stretching vibrations, typically from aliphatic –CH₂– or –CH₃ groups. * **3338 cm⁻¹ & 3370 cm⁻¹:** The very strong, broad band centered at ~3338 cm⁻¹ with a sharp component at 3370 cm⁻¹ is definitive for O–H stretching vibrations. The broadness suggests hydrogen-bonded O–H groups (e.g., in alcohols, carboxylic acids). The sharp feature at 3370 cm⁻¹ may indicate the presence of some free (non-hydrogen-bonded) O–H groups or N–H stretching, though O–H is more consistent with the overall spectral pattern.
**Conclusion:** The FTIR spectrum indicates the presence of the following functional groups/structural features: 1. **Hydroxyl Group (O–H):** Primary component, evidenced by the very strong, broad O–H stretch (3338, 3370 cm⁻¹) and supporting C–O stretch (1036 cm⁻¹). 2. **Alkene Group (C=C):** Indicated by the sharp =C–H out-of-plane bending vibrations (917, 995 cm⁻¹). 3. **Aliphatic C–H Groups:** Present, based on the weak C–H stretch (2924 cm⁻¹).
**Inference:** Based on the co-occurrence of strong, hydrogen-bonded O–H, C–O stretch, and alkene bands, the sample is likely a **polyhydroxy compound containing an alkene moiety**. The pattern is suggestive of an **unsaturated alcohol or polyol** (e.g., an allylic alcohol or a compound like an unsaturated sugar derivative). The absence of a strong carbonyl band (C=O stretch ~1700-1750 cm⁻¹) argues against a significant presence of carboxylic acids, aldehydes, ketones, or esters as major components. The exact structure cannot be determined from IR data alone.
This discussion presents an infrared spectral analysis combining
automated interpretation with reference comparison to support
functional group identification and structural assessment.
FTIR Spectrum Interpretation Summary
Comparative Analysis Conclusion
AI-assisted Interpretation Conclusion
**Data → Analysis → Conclusion/Inference**
**Data:**
* 917 cm⁻¹: weak, sharp (height 0.14)
* 995 cm⁻¹: medium, sharp (height 0.43)
* 1036 cm⁻¹: strong, broad (height 0.67)
* 1414 cm⁻¹: weak, broad (height 0.15)
* 2924 cm⁻¹: weak, broad (height 0.15)
* 3338 cm⁻¹: strong, broad (height 1.00)
* 3370 cm⁻¹: strong, sharp (height 0.96)
**Analysis:**
* **917 cm⁻¹ & 995 cm⁻¹:** These sharp peaks in the 900-1000 cm⁻¹ region are characteristic of =C–H out-of-plane bending vibrations in alkenes. The specific pattern suggests a possible trisubstituted alkene.
* **1036 cm⁻¹:** The strong, broad absorption is indicative of C–O stretching vibrations, commonly associated with primary or secondary alcohols, or possibly ethers.
* **1414 cm⁻¹:** The weak, broad band is in the region for O–H in-plane bending (of carboxylic acids) or C–H bending (scissoring) vibrations.
* **2924 cm⁻¹:** The weak, broad feature corresponds to C–H stretching vibrations, typically from aliphatic –CH₂– or –CH₃ groups.
* **3338 cm⁻¹ & 3370 cm⁻¹:** The very strong, broad band centered at ~3338 cm⁻¹ with a sharp component at 3370 cm⁻¹ is definitive for O–H stretching vibrations. The broadness suggests hydrogen-bonded O–H groups (e.g., in alcohols, carboxylic acids). The sharp feature at 3370 cm⁻¹ may indicate the presence of some free (non-hydrogen-bonded) O–H groups or N–H stretching, though O–H is more consistent with the overall spectral pattern.
**Conclusion:**
The FTIR spectrum indicates the presence of the following functional groups/structural features:
1. **Hydroxyl Group (O–H):** Primary component, evidenced by the very strong, broad O–H stretch (3338, 3370 cm⁻¹) and supporting C–O stretch (1036 cm⁻¹).
2. **Alkene Group (C=C):** Indicated by the sharp =C–H out-of-plane bending vibrations (917, 995 cm⁻¹).
3. **Aliphatic C–H Groups:** Present, based on the weak C–H stretch (2924 cm⁻¹).
**Inference:**
Based on the co-occurrence of strong, hydrogen-bonded O–H, C–O stretch, and alkene bands, the sample is likely a **polyhydroxy compound containing an alkene moiety**. The pattern is suggestive of an **unsaturated alcohol or polyol** (e.g., an allylic alcohol or a compound like an unsaturated sugar derivative). The absence of a strong carbonyl band (C=O stretch ~1700-1750 cm⁻¹) argues against a significant presence of carboxylic acids, aldehydes, ketones, or esters as major components. The exact structure cannot be determined from IR data alone.
This discussion presents an infrared spectral analysis combining automated interpretation with reference comparison to support functional group identification and structural assessment.