{"id":441,"date":"2021-10-26T17:30:34","date_gmt":"2021-10-26T21:30:34","guid":{"rendered":"https:\/\/blog.richmond.edu\/chem205l\/?page_id=441"},"modified":"2022-06-20T12:11:43","modified_gmt":"2022-06-20T16:11:43","slug":"nmr-data-analysis","status":"publish","type":"page","link":"https:\/\/blog.richmond.edu\/chem205l\/nmr-data-analysis\/","title":{"rendered":"NMR Data Analysis"},"content":{"rendered":"<p style=\"text-align: center;\"><span style=\"text-decoration: underline;\"><strong>Chemical Shift Correlation Graphics<\/strong><\/span><\/p>\n<p>Note: Figures show typical chemical shifts for nuclei influenced by a <i>single <\/i>structural feature. When nuclei are influenced by <i>more than one structural feature<\/i>, the influence on chemical shift is essentially cumulative.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-813 size-full\" src=\"http:\/\/blog.richmond.edu\/chem205l\/files\/2022\/06\/Proton-NMR-Shift-Graphic-1.png\" alt=\"\" width=\"1852\" height=\"1020\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-815\" src=\"http:\/\/blog.richmond.edu\/chem205l\/files\/2022\/06\/Carbon-NMR-Shift-Graphic-1.png\" alt=\"\" width=\"1852\" height=\"1020\" \/><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><span style=\"text-decoration: underline;\"><strong>\u00b9H NMR Coupling Constants<\/strong><\/span><\/p>\n<p style=\"text-align: left;\">Coupling constants are described by their <em>J<\/em> value, which is the distance between each peak in a split signal. The unit for <em>J <\/em>values is Hz and equals the change in chemical shift (in ppm) multiplied by the magnet strength (in Hz). Generally, the <em>J<\/em> value is measured directly from the NMR spectrum.<\/p>\n<p style=\"text-align: center;\">J value = (\u0394 in ppm)\u00a0 x\u00a0 (magnet strength in Hz)<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><span style=\"text-decoration: underline;\"><strong>Coupling Constants for Cis\/Trans Alkenes<\/strong><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-816\" src=\"http:\/\/blog.richmond.edu\/chem205l\/files\/2022\/06\/Alkene-Coupling-Summary.png\" alt=\"\" width=\"813\" height=\"444\" \/><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><span style=\"text-decoration: underline;\"><strong>Coupling Constants for Aromatic Protons<\/strong><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-817\" src=\"http:\/\/blog.richmond.edu\/chem205l\/files\/2022\/06\/Aromatic-Coupling-Summary.png\" alt=\"\" width=\"757\" height=\"240\" \/><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><span style=\"text-decoration: underline;\"><strong>NMR Solvent Data<\/strong><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-820 size-full\" src=\"http:\/\/blog.richmond.edu\/chem205l\/files\/2022\/06\/NMR-Solvent-Data-Table-2.png\" alt=\"\" width=\"951\" height=\"792\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Chemical Shift Correlation Graphics Note: Figures show typical chemical shifts for nuclei influenced by a single structural feature. When nuclei are influenced by more than one structural feature, the influence on chemical shift is essentially cumulative. &nbsp; \u00b9H NMR Coupling &hellip; <a href=\"https:\/\/blog.richmond.edu\/chem205l\/nmr-data-analysis\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":5206,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"coauthors":[175315],"class_list":["post-441","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blog.richmond.edu\/chem205l\/wp-json\/wp\/v2\/pages\/441","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.richmond.edu\/chem205l\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blog.richmond.edu\/chem205l\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blog.richmond.edu\/chem205l\/wp-json\/wp\/v2\/users\/5206"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.richmond.edu\/chem205l\/wp-json\/wp\/v2\/comments?post=441"}],"version-history":[{"count":6,"href":"https:\/\/blog.richmond.edu\/chem205l\/wp-json\/wp\/v2\/pages\/441\/revisions"}],"predecessor-version":[{"id":821,"href":"https:\/\/blog.richmond.edu\/chem205l\/wp-json\/wp\/v2\/pages\/441\/revisions\/821"}],"wp:attachment":[{"href":"https:\/\/blog.richmond.edu\/chem205l\/wp-json\/wp\/v2\/media?parent=441"}],"wp:term":[{"taxonomy":"author","embeddable":true,"href":"https:\/\/blog.richmond.edu\/chem205l\/wp-json\/wp\/v2\/coauthors?post=441"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}