Chem 241a 1nd Edition Lecture 4Outline of Last Lecture I. Acids/bases continuedII. Representing organic moleculesIII. Functional groups, intramolecular interactions, and physical propertiesIV. NomenclatureOutline of Current Lecture I. Continuation of nomenclatureII. Simple branch compoundsIII. More complicated branched compoundsIV. Naming cycloalkanesCurrent LectureI. Continuation of nomenclaturea. Parent group: the longest continuous chain without picking up your penb. Branch: what’s coming off the parent (alkyl group)II. Simple branch compoundsa. In order to name the compounds, first you have to identify the parent chainb. Next, determine location and type of alkyl branchc. If there are more than one possibilities, choose the one that has more branchesd. Number the carbons so that the branches get the LOWER numbere. Name the branches and assign carbon number to which it is attached tof. If more than one of the SAME group is attached to the parent chain, EACH gets a site number and a prefix indicating how many of eachi. Di (2), tri (3), tetra (4), penta (5), hexa (6)….These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.III. More complicated branched compoundsa. Different naming of Carbon’si. Primary carbon: carbons attached only to one other carbonii. Secondary carbon: carbons attached to two carbonsiii. Tertiary carbon: attached to three carbonsiv. Quaternary carbon: attached to four carbonsb. Different naming of Hydrogen’si. Primary hydrogen: bonded to primary carbonsii. Secondary hydrogen: bonded to secondary carbonsiii. Tertiary hydrogen: bonded to tertiary carbonsiv. NOTE: there are no quaternary hydrogen’sc. 5 special common names for branched alkyl groups *do not memorize the last*d. Naming branched branches without using common namesi. Number branches starting with carbon attached to parent, starting with number 1ii. Find second longest continuous chain from 1iii. Name and number branches off the longestbranchiv. Use parentheses to show its one groupv. Ex: 3-(1-methylethyl)hexane IV. Naming cycloalkanesa. Cycloalkanes can be named as a group – “yl” endingi. Ex: 2-cyclopropylbutaneb. Cycloalkanes can be named as a parenti. Ex: 1-methylcyclopropanec. NOTE: If they are the same the cyclic compound is the parentPlease refer to Dr. Dollinger’s Nomenclature Hand Out: http://bit.ly/1qKqEKe (Remember to log onto
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