IUPAC name

ORIGIN OF NAME IUPAC transition name, "ununbium" (which literally means 112), is used to name new elements until lUPAC s naming committee decides upon a permanent name. 

Common name IUPAC name Symbol and defining equation... 

Terpene chemists use trivial names for most of the compounds because the systematic names are much more complex. Common or trivial names, CAS Registry Numbers, and properties of selected terpenes and terpenoids are listed in Tables 2 and 3. Compounds that exhibit chirality also have other Registry Numbers for specific optical isomers. For commercial products, a material safety data sheet (MSDS), which is required by OSHA, frequendy lists multiple names such as a product name, trivial name, IUPAC name and the TSCA name. The MSDS is a good source of information about physical properties, potential health hazards, and other useful information for the safe handling of the materials. When the product is a mixture, the components and their amounts are usually listed along with their Registry Numbers. 

Functional form Symbol Common name IUPAC name lim c -+0... 

Acyclic 3, p.13 Use Systematic Names (IUPAC Rules). Exceptions Four Unsubstituted Radical Recognized by IUPAC (See Text) ... 

IUPAC common name IUPAC alternate name Systemic name... 

An important commentary on IUPAC s lack of a name for these larger Platonic solids is in order. Namely, IUPAC assigns names only when there is a consensus as to what is appropriate. Its mandate is not to be an innovator, but to codify, and thus standardize, what is the accepted form. 

Synonym Alternative names (IUPAC and others), as well as trivial names, are indicated. Obsolete and slang names have been eliminated as far as possible. Most synonyms are entered independently and cross-referenced, but space limitation has not permitted complete consistency in this regard. 

Trivial Name IUPAC Name Absolute Configuration... 

Cal ratio Chemical formula Cement chemical notation Chemical name (IUPAC notation) Common acronyms... 

ThomsonN r Click Organic Interactive to learn to write IUPAC names for simple alkanes. 

As the science of organic chemistry slowly grew in the 19th century, so too did the number of known compounds and the need for a systematic method of naming them. The system of nomenclature we ll use in this book is that devised by the International Union of Pure and Applied Chemistry (IUPAC, usually spoken as eye-you-pac). 

A chemical name typically has four parts in the IUPAC system of nomenclature prefix, locant, parent, and suffix. The prefix specifies the location and identity of various substituent groups in the molecule, the locant gives the location of the primary functional group, the parent selects a main part of the molecule and tells how many carbon atoms are in that part, and the suffix identifies the primary functional group. 

As we cover new functional groups in later chapters, the applicable IUPAC rules of nomenclature will be given. In addition, Appendix A at the back of this book gives an overall view of organic nomenclature and shows how compounds that contain more than one functional group are named. For the present, let s see how to name branched-chain alkanes and learn some general naming rules that are applicable to all compounds. 

The common names of these simple alkyl groups are so well entrenched in the chemical literature that IUPAC rules make allowance for them. Thus, the following compound is properly named either 4-(l-methvlethyl)heptane or 4-iso-propylheptane. There is no choice but to memorize these common names fortunately, there are only a few of them. 

Problem 3.12 Draw structures corresponding to the following IUPAC names ... 

Problem 3.14 Give the IUPAC name for the following hydrocarbon, and convert the drawing into a skeletal structure. 

Alkanes are a class of saturated hydrocarbons with the general formula C H2n. -2- They contain no functional groups, are relatively inert, and can be either straight-chain (normal) or branched. Alkanes are named by a series of IUPAC rules of nomenclature. Compounds that have the same chemical formula but different structures are called isomers. More specifically, compounds such as butane and isobutane, which differ in their connections between atoms, are called constitutional isomers. 

Give IUPAC names for the following alkanes, and convert each drawing into a skeletal structure ... 

Thomson NOW Click Organic Interactive to use a web-based palette to draw alkene structures based on their IUPAC names. 

Ocimene is a triene found in the essential oils of many plants. What is its IUPAC name, including stereochemistry ... 

The following two hydrocarbons have been isolated from various plants in the sunflower family. Name them according to IUPAC rules. 

The sex attractant given off by the common housefly is an alkene named muscahtre. Propose a synthesis of muscalure starting from acetylene and any alkyl halides needed. What is the IUPAC name for muscalure ... 

Interactive to practice assigning IUPAC names to organic halides. 

Simple alcohols are named by the IUPAC system as derivatives of the parent alkane, using the suffix -ol. 

Rule 3 Number the substituents according to their position on the chain, and write the name listing the substituents in alphabetical order and identifying the position to which the -OH is bonded. Note that in naming ns-l,4-cyclohexanediol, the final -e of cyclohexane is not deleted because the next letter, d. is not a vowel, that is, cyclohexanediol rather than cyclohexandiol. Also, as with alkenes (Section 6.3), newer IUPAC naming recommendations place the locant immediately before the suffix rather than before the parent. 

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