“E–Z convention”的概念、定义、翻译、参考文献-科学参考

E–Z convention

Chemistry

A convention for the description of a molecule showing cis-trans isomerism (see isomerism). In a molecule ABC=CDE, where A,B,D, and E are substituent groups, the sequence rule (see CIP system) is applied to the pair A and B to find which has priority and similarly to the pair C and D. If the two groups of highest priority are on the same side of the bond then the isomer is designated Z (from German zusammen, together). If they are on opposite sides the isomer is designated E (German entgegen, opposite). The letters are used in the names of compounds; for example (E)-butenedioic acid (fumaric acid) and (Z)-butenedioic acid (maleic acid). In compounds containing two (or more) double bonds numbers are used to designate the bonds (e.g. (2E, 4Z)-2,4-hexadienoic acid). The system is less ambiguous than the cis/trans system of describing isomers.
https://www.acdlabs.com/iupac/nomenclature/93/r93_626.htm Information about the convention from IUPAC

单词	E–Z convention
释义	E–Z convention Chemistry A convention for the description of a molecule showing cis-trans isomerism (see isomerism). In a molecule ABC=CDE, where A,B,D, and E are substituent groups, the sequence rule (see CIP system) is applied to the pair A and B to find which has priority and similarly to the pair C and D. If the two groups of highest priority are on the same side of the bond then the isomer is designated Z (from German zusammen, together). If they are on opposite sides the isomer is designated E (German entgegen, opposite). The letters are used in the names of compounds; for example (E)-butenedioic acid (fumaric acid) and (Z)-butenedioic acid (maleic acid). In compounds containing two (or more) double bonds numbers are used to designate the bonds (e.g. (2E, 4Z)-2,4-hexadienoic acid). The system is less ambiguous than the cis/trans system of describing isomers. https://www.acdlabs.com/iupac/nomenclature/93/r93_626.htm Information about the convention from IUPAC
随便看	half‐space half‐turn symmetry halibut halide halides Halidon Hill, Battle of (19 July 1333) Halifax, Edward Frederick Lindley Wood, 1st Earl of (1881–1959) Halimede halinity Haliomma vetustum halite Hall, Asaph Hall, Asaph (1829–1907) Hall, Charles Martin Halldén completeness Halldén reasonable Hall, Edwin Herbert Hall effect scintillation counter Scintillation Observations and Response of the Ionosphere to Electrodynamics Scintillation Prediction Observations Research Task scintillometer scintillometer survey scion Scipio Aemilianus (185–129)