It is important that students get a good grasp of the convention used. Historically, benzenelike substances were called aromatic hydrocarbons because they had distinctive aromas. There are four parts to the name of a branched hydrocarbon 1. For each of the following structural diagrams, write the iupac name. And when naming an aromatic compound with one of these rings, you need to use the common name as the parent and not the benzene. This page looks at the names of some simple aromatic compounds. Unlike the earlier questions on naming organic compounds, these questions are just an unsorted. This is a very good class starter, and also an assessment to check and challenge students understanding of the topic. Simply put, aliphatic compounds are compounds that do not incorporate any. This organic chemistry video tutorial shows you how to name aromatic compounds involving benzene ring derivatives.
Amines are organic derivatives of ammonia, nh 3, in. The nomenclature of organic compounds compounds containing carbon is based on a simple system of prefixes. Cyclic congugation increases the number of p orbital interactions in the conjugated system, stabilizing the pi bonds. Structural isomers, geometric isomers and stereoisomers naming of hydrocarbons and halogenated hydrocarbons chemica. There are also monosubstituted benzene rings that have common names.
This aromatic hydrocarbons benzene type compounds naming ppt and worksheet with answers provided will help students in the nomenclature of aromatic compounds. Aromatic ketones a special group of aromatic compounds are ketones where the carbonyl is attached to at least one benzene ring. Next we consider a class of hydrocarbons with molecular formulas like those of unsaturated hydrocarbons, but which, unlike the alkenes, do not readily undergo addition reactions. Naming aromatic compounds aromatic compounds are cyclic hydrocarbons containing a benzene structure. Aromatic compounds phenol, toluene, anisole, benzoic page 12. The benzene ring has two nitro no 2 groups in the first and third positions. C he m g ui d e an s we r s naming organic compounds. Properties of aromatic compounds introduction to chemistry. Substituents are named with numbers indicating their position in the ring. For any alkanes, alkenes, alkynes, aromatic compounds, carboxylic acids or alcohols, provide the iupac name of the molecule.
Polycyclic aromatic hydrocarbons aromatic compounds can have rings that share a set of carbon atoms fused rings compounds from fused benzene or aromatic heterocyclic rings are themselves aromatic naphthalene. This is a simple example of a halogen attached to the benzene ring. These compounds comprise a distinct class, called aromatic hydrocarbons. Alkanes you must know how to name and draw straight chain and branched alkanes. Find the longest chain containing the highest priority group. Tutorial organic nomenclature worksheet part 1 naming benzene ring derivatives aromatic compounds phenol, toluene, anisole, benzoic acid this organic chemistry video tutorial shows you how to name aromatic compounds involving benzene ring derivatives. Science organic chemistry aromatic compounds naming benzene derivatives.
Short summary of iupac nomenclature of organic compounds. There have been many conventions for naming organic compounds some have. Naming benzene ring derivatives aromatic compounds. The three simplest families of hydrocarbons are known as the. When placed together most elements will begin to lose electrons becoming a positive ion or gain electrons becoming a negative ion. Determining aromaticity, non aromatics, and antiaromatics. Benzene can be represented by the resonance structures.
For each of the following iupac names, draw a structural diagram. The alkanes and cycloalkanes are also members of a larger class of compounds referred to as. Select a compound from the list to see its structure, or click on answer to see the name of the currently displayed structure. Document in microsoft internet explorer people ubcs. Naming hydrocarbons diman regional voctech serving. An aromatic compound is one which contains a benzene ring.
Naming hetrocycles with fused rings when naming such compounds the side of the heterocyclic ring is labeled by the letters a, b, c, etc. Aromatic hydrocarbons are compounds that contain a benzene ring structure. Naming branchedchain alkanesone page with 9 branched. Today, an aromatic compound is any compound that contains a benzene ring or has certain benzenelike properties but not necessarily a strong aroma. Introduction it is important that organic compounds are corrrectly and unambiguously named so that there can be absolutely no confusion about what compounds are actually being reported or described. Name benzene derivatives given the structures, and draw the structures given the names.
This naming system was very trivial since it raised a lot of confusion. The benzene ring has two chlorine atoms dichloro in the first and second positions. Quiz on functional groups general strategy for naming. Aromatic compounds definition, example, properties. Alkaloids are ncontaining, weakly basic organic compounds. Naming benzene derivatives introduction video khan academy. Gce a level aromatic chemistry nomenclature naming. Quiz on functional groups general strategy for naming simple organic compounds bare bones summary sheets 1. The formulas and common names for several substances are given below. A worksheet and starter activity is included to practice the rules for naming aromatic compounds. You can recognize the aromatic compounds in this text by the presence of one or more benzene rings in their structure. You should know carbon chains of length c1c12 listed in the table. Naming, molecular formula, structural formula, condensed formula, and carbon skeletal formula. The goal of the system is to give each structure a unique and unambiguous name, and to correlate each name with a unique and unambiguous.
The structure of benzene in the resonance hybrid, the six electrons from the three. These are listed in order of priority in the table of functional groups. They are a major component of proteins and enzymes, nucleic acids, alkaloid drugs, etc. Often, more than one name is acceptable and its not uncommon to find the old names still in use as well. There are three systems for naming heterocyclic compounds. Naming aromatic compounds isnt quite so straightforward as naming chain compounds. The actual structure of benzene, however, is a resonance hybrid of these two structure usually written as. Finish the straight chain alkane practice at the end of the notes. Read online naming alkanes worksheet 1 answers naming alkanes worksheet 1 answers recognizing the exaggeration ways to get this books naming alkanes worksheet 1 answers is additionally useful. Further resources for aromatic nomenclature are available in the accompanying aromatic chemistry aqa teacher support pack containing more resources and activities covering nomenclature, electrophilic substitution reactions and examstyle questions. Short summary of iupac nomenclature of organic compounds introduction the purpose of the iupac system of nomenclature is to establish an international standard of naming compounds to facilitate communication. Classification and nomenclature of amines 4 amines amines and amides are abundant in nature. Such compounds are named as phenones, the prefix depending on the size and nature of the group on the other side of the carbonyl.
Aromatic compounds with only one group attached to the benzene ring. Instead, each sample of an element contains a huge number of atoms. All aromatic compounds are based on benzene, c 6 h 6, which has a ring of six carbon atoms and has the symbol. Tells how many carbons are in the longest continuous chain. Can use o, p, m, or numbers when naming disubstitued aromatic rings. The compound is therefore named as a derivative of toluene. This handout will address the naming of simple organic compounds and is by no. This quiz and worksheet combo will help you evaluate your understanding of aromatic compounds characteristics and properties. This is structure and nomenclature of aromatic compounds, section. Naming hydrocarbons name name the compounds below according to the iupac naming system 1. The two benzene rings are confusing, especially since one of them has been rotated to make it fit the diagram better. This method of naming is iupac naming or iupac nomenclature. Finally, a common naming system enlisting standard rules was set up by iupac international union for pure and applied chemistry for the naming of compounds.
The double bonds in aromatic compounds are less likely to participate in addition reactions than those found in typical alkenes. Naming this compound is a little complicated, and for the. Aromatic hydrocarbons practice sheet for naming and drawing rules 1. Nomenclature of substituted benzene rings when you have two substituents on a benzene ring, ortho, meta.
Instead, cyclic aromatic compounds undergo electrophilic substitution reactions reactions in which the ring acts as an nucleophile to a suitable electrophile. For the four special monosubstituted benzenes, use the common name. This usually originates from the compounds occurrence, its. Which of the following is true about the iupac naming system for aromatic compounds.
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