3-ethyl-2,4-dimethylpentane, not 2,4-dimethyl-3-ethylpentane). The yl is 'cause it's a group attached to the main alkane chain. (The longest chain overall has five carbon atoms, but it does not contain the double bond, so the parent name is not pentene.) Structure, properties, spectra, suppliers and links for: Ethylmethylamine, 624-78-2. But we have to specify where the ethyl group is attached and we wanna give it as low of a number as possible so we start counting on the side closest to it. C-C-C-C-C-C Adding groups w.r.t their orders; C-C(2 CH 3)-C-C(C 2 H 5)-C-C Filling up valencies w.r.t. ! prefixes are ignored for the purpose of alphabetical ordering of side chains (e.g. So we call this ethyl decane. Loading... Unsubscribe from Organic Chemistry Explained!? I need to know a.s.a.p. If there is anyways you can help i would greatly appreciate it! C3H9N Structural Isomers!!? Number the substituents of the chain so that the sum of the numbers is the lowest possible. Cancel Unsubscribe. How do you write structural formulas for all the constitutionally isomeric compounds having the given molecular formula C3H9N, with a n-propyl parent chain and an ethyl parent chain ? If multiple chains of the longest possible length exist, the chain that has a larger number of branch points is the chain that is used. If stereochemistry of the compound is shown, indicate the orientation as part of the nomenclature. The di-, tri- etc. So it's one, two, three, four, five. There is an ethyl group on the second carbon atom (rule 3), so the compound’s name is 2-ethyl-1-butene. I'm trying to learn some basic organic chemistry but I get a little confused when it comes to determining structural isomers for, let's say, the formula above. Now let's complicate this a little bit more. Naming alkanes - spot the parent chain Organic Chemistry Explained! the structural isomers of C3H9N, I think there are seven because that is how many points the question is worth. As have mentioned in the asked question, the chain contain a saturated Hydrocarbon ‘’Hexane’’ so the structure is of 6 Carbons. Determine the parent chain: the parent chain contains the most carbon atoms. To give the first carbon atom of the double bond the lowest number (rule 2), we number from the left, so the compound is a 1-butene. Name the substituents and place them in alphabetical order. So this is 5-ethyl decane.