Question

URGENT IR UNKNOWN: Please Identify the unknown molecule from the IR spectrum shown below. Pick one from the following from the list of of possibilities for the unknown molecule:

80 70 2109.74cm-1 3021.84cm-1 1598.19cm-1 60 3033.75cm-1 50 1070.67am-1 3058.02cm-1 3080 79am-1 40 30 1443.72cm-1 20 1488.33c1,2-dimethoxybenzene (91-16-7) 1,3-propanediol (504-63-2) 1-bromobutane (109-65-9) 1-Octanol (111-87-5) 2,3-dimethyl-2-butano

80 70 2109.74cm-1 3021.84cm-1 1598.19cm-1 60 3033.75cm-1 50 1070.67am-1 3058.02cm-1 3080 79am-1 40 30 1443.72cm-1 20 1488.33cm-1 1어 757.39cm-1 3291.90cm-1 -o- -2 4000 3500 3000 2000 2500 1500 1000 500450 cm-1
1,2-dimethoxybenzene (91-16-7) 1,3-propanediol (504-63-2) 1-bromobutane (109-65-9) 1-Octanol (111-87-5) 2,3-dimethyl-2-butanol (594-60-5) 2-cyclohexen-1-one (930-68-7) 2-cyclopenten-1-one (930-30-3) 2-methylcyclohexanone (583-60-8) 3,3-dimethyl-2-butanone (75-97-8) 3-ethyltoluene (620-14-4) 3-methyl-1-butanol (123-51-3) 4-benzylpiperidine (31252-42-3) 4-methylphenol (106-44-5) N,N-dimethylformamide (68-12-2) N-methylaniline (100-61-8) acetic anhydride (108-24-7) acetone (67-64-1) acetonitrile (75-5-8) acetophenone (98-86-2) acetyl chloride (75-36-5) allyl alcohol (107-18-6) anisole (100-66-3) benzaldehyde (100-52-7) benzoic acid (65-85-0) benzophenone (119-61-9) benzoyl chloride (98-88-4) benzyl acetate (140-11-4) bromobenzene (108-86-1) cyclohexanone (108-94-1) cyclopentanone (120-92-3) cyclopropyl methyl ketone (765-43-5) diethylamine (109-89-7) dimethyl malonate (108-59-8) ethyl cyanoacetate (105-56-6) gamma-butyrolactone (96-48-0) heptanoic acid (111-14-8) methyl benzoate (93-58-3) methyl propionate (554-12-1) naphthalene (91-20-3) nitrobenzene (98-95-3) o-xylene (95-47-6) octylamine (111-86-4) P-anisaldehyde (123-11-5) phenylacetylene (536-74-3) sodium acetate (127-09-3) sodium bromide (7647-15-6) tetrahydrofuran (109-99-9) toluene (108-88-3)
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Answer #1

Solution: CH From the given IR spectrum the reasonable structure will be (phenylacetylene) IR interpretation Functional group

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