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GIÁO TRÌNH THỰC HÀNH HÓA HỮU CƠ TRƯỜNG ĐẠI HỌC CÔNG NGHIỆP TP. HỒ CHÍ MINH (2016)

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4. Vẽ sơ đồ chẻ mũi trong phổ 1 H NMR của proton được gán nhãn là H b<br />

trong đồng phân 1,3-dicloropropen, cho các hằng số ghép cặp sau: J ab =<br />

13.1 Hz và J bc = 7.2 Hz.<br />

Cl<br />

H b<br />

Ha<br />

CH 2<br />

Cl<br />

H c<br />

trans-1,3-dicloropropen<br />

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5. Nhận danh hai đồng phân A, B có công thức phân tử là C 3 H 4 Cl 2 từ dữ<br />

liệu phổ NMR 1 H đưa ra: hợp chất A cho thấy mũi tín hiệu ở 1.75 ppm<br />

(d,3H, J=6.9Hz) và 5.89 ppm (q,1H, J=6.9 Hz). Hợp chất B đưa mũi tín<br />

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