{"id":902,"date":"2017-03-08T13:52:25","date_gmt":"2017-03-08T13:52:25","guid":{"rendered":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/?page_id=902"},"modified":"2024-03-01T08:08:23","modified_gmt":"2024-03-01T08:08:23","slug":"ep3_5b-n5-isomers-naming","status":"publish","type":"page","link":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/ep3_5b-n5-isomers-naming\/","title":{"rendered":"EP3_5D N5 Isomers"},"content":{"rendered":"
Isomers are hydrocarbons which have the same molecular formula<\/span><\/strong>, but a different structural formula<\/span><\/strong>.\u00a0 This means they have the\u00a0 same numbers and types of atom<\/span><\/strong>, but they are arranged differently<\/span><\/strong>.  Isomers may have different physical and chemical properties\r\n\r\nWhen two hydrocarbon structures differ, with one having branch(es) the second being a straight chain hydrocarbon (e.g. but-1-ene (C4<\/sub>H8<\/sub>) and methylpropene (C4<\/sub>H8<\/sub>)), they are isomers)<\/pre>\n\n\n\n\n
\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n
\n
but-1-ene<\/span><\/pre>\n<\/td>\n
\n
methylpropene<\/span><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
It is worth noting that alkenes<\/span><\/strong> and cycloalkanes<\/span><\/strong>, because they both have the same general formula (Cn<\/sub>H2n<\/sub>), will always be isomers when they have the same molecular formula (e.g. cyclobutane (C4<\/sub>H8<\/sub>) and butene (C4<\/sub>H8<\/sub>) are isomers).<\/pre>\n\n\n\n\n
\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n
\n
cyclobutane<\/span><\/pre>\n<\/td>\n
\n
but-1-ene<\/span><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
Finally, isomers also occur when the position<\/span><\/em><\/strong> of any functional group<\/span><\/strong><\/em> is altered. (e.g. butan-1-ol (C4<\/sub>H9<\/sub>OH) and butan-2-ol (C4<\/sub>H9<\/sub>OH) are isomers).<\/pre>\n\n\n\n\n
\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n
\n
pentan-1-ol<\/span><\/pre>\n<\/td>\n
\n
pentan-2-ol<\/span><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n
\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n
\n
1-bromopropane<\/span><\/pre>\n<\/td>\n
\n
2-bromopropane<\/span><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
You must be careful not to confuse structures drawn in different directions or where the main chain is drawn bent.  These are not isomers, as if you name them, you will find they are the same structural formula<\/pre>\n\n\n\n\n\n\n
\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n
\n
but-1-ene<\/span><\/pre>\n<\/td>\n
\n
but-1-ene<\/span><\/pre>\n<\/td>\n<\/tr>\n
\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n
\n
heptane<\/span><\/pre>\n<\/td>\n
\n
heptane<\/span><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"
Isomers are hydrocarbons which have the same molecular formula, but a different structural formula.\u00a0 This means they have the\u00a0 same numbers and types of atom, but they are arranged differently. Isomers may have different physical and chemical properties When two hydrocarbon structures differ, with one having branch(es) the second being a straight chain hydrocarbon (e.g. … Continue reading “EP3_5D N5 Isomers”<\/span><\/a><\/p>\n","protected":false},"author":2454,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-902","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/pages\/902","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/users\/2454"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/comments?post=902"}],"version-history":[{"count":20,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/pages\/902\/revisions"}],"predecessor-version":[{"id":2666,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/pages\/902\/revisions\/2666"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/media?parent=902"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}