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In chemical nomenclature, a preferred IUPAC name (PIN) is a unique name, assigned to a chemical substance and preferred among the possible names generated by IUPAC nomenclature. The "preferred IUPAC nomenclature" provides a set of rules for choosing between multiple possibilities in situations where it is important to decide on a unique name. It is intended for use in legal and regulatory situations.〔.〕 Currently, preferred IUPAC names are written only for part of the organic compounds (see below). Rules for the remaining organic and inorganic compounds are still under development.〔IUPAC (''Project: Preferred IUPAC Names (PINs) for Inorganic Compounds'' )〕 The ''"Preferred names in the nomenclature of organic compounds"'' (Draft 7 October 2004) replace two former publications: the ''"Nomenclature of Organic Chemistry"'', 1979 (the ''Blue Book'') and ''"A Guide to IUPAC Nomenclature of Organic Compounds, Recommendations 1993"''.〔IUPAC Provisional Recommendations 2004 (CONTENTS )〕〔IUPAC Provisional Recommendations 2004 (Complete draft version )〕 , these draft recommendations have yet to gain formal approval. == Definitions == A preferred IUPAC name or PIN is a name that is preferred among two or more IUPAC names. An IUPAC name is a systematic name that meets the recommended IUPAC rules. IUPAC names include retained names. A general IUPAC name is any IUPAC name that is not a "preferred IUPAC name". A retained name is a traditional or otherwise often used name, usually a trivial name, that may be used in IUPAC nomenclature.〔IUPAC Provisional Recommendations 2004, par. 10-12, (Chapter 1 )〕 Since systematic names often are not human-readable a PIN may be a retained name. Both "PINs" and "retained names" have to be chosen (and established by IUPAC) explicitly, unlike other IUPAC names, which automatically arise from IUPAC nomenclatural rules. A preselected name is a preferred name chosen among two or more names for parent hydrides or other parent structures that do not contain carbon (inorganic parents). "Preselected names" are used in the nomenclature of organic compounds as the basis for PINs for organic derivatives. They are needed for derivatives of organic compounds that do not contain carbon themselves.〔 A preselected name is not necessarily a PIN in inorganic chemical nomenclature. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Preferred IUPAC name」の詳細全文を読む スポンサード リンク
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