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Structural investigation of poly (methyl acrylate) by 2D HMBC NMR |
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| Authors: | AS Brar Ashok Kumar Goyal Sunita Hooda |
| Institution: | aDepartment of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110 016, India;bDepartment of Chemistry, Acharya Narendra Dev College, Govindpuri, Kalkaji, New Delhi 110 019, India |
| Abstract: | Three and four bond order couplings between carbonyl carbon and other neighboring protons have been investigated in detail with the help of 2D heteronuclear multiple bond correlation (HMBC) spectrum. The methine and methylene protons in pentad and tetrad configuration were found to couple with carbonyl carbon. The intensity ratio of methylene protons’ cross peaks in HMBC spectrum shows that 50% of poly methyl acrylate (PMA) is in isotactic and 50% is in syndiotactic configuration. The configurational analysis was mainly carried out with the help of 2D HMBC spectrum. |
| Keywords: | Methyl acrylate HMBC Microstructure NMR Polymerization |
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