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undergraduate thesis
Derivati karboksilnih kiselina i sinteza mirisnih estera
2017. urn:nbn:hr:182:533070
Šibila, Lara
Josip Juraj Strossmayer University of Osijek
Department of Chemistry
Department of Analytical, Organic and Applied Chemistry

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Šibila, L. (2017). Derivati karboksilnih kiselina i sinteza mirisnih estera (Undergraduate thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry. Retrieved from https://urn.nsk.hr/urn:nbn:hr:182:533070

Šibila, Lara. "Derivati karboksilnih kiselina i sinteza mirisnih estera." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2017. https://urn.nsk.hr/urn:nbn:hr:182:533070

Šibila, Lara. "Derivati karboksilnih kiselina i sinteza mirisnih estera." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2017. https://urn.nsk.hr/urn:nbn:hr:182:533070

Šibila, L. (2017). 'Derivati karboksilnih kiselina i sinteza mirisnih estera', Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, accessed 18 November 2024, https://urn.nsk.hr/urn:nbn:hr:182:533070

Šibila L. Derivati karboksilnih kiselina i sinteza mirisnih estera [Undergraduate thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry; 2017 [cited 2024 November 18] Available at: https://urn.nsk.hr/urn:nbn:hr:182:533070

L. Šibila, "Derivati karboksilnih kiselina i sinteza mirisnih estera", Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, Osijek, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:182:533070

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Metadata
TitleDerivati karboksilnih kiselina i sinteza mirisnih estera
Title (english)The carboxylic acid derivatives and the synthesis of fragrant esters
AuthorLara Šibila
MentorAleksandar Sečenji (mentor)
MentorDajana Gašo-Sokač (komentor)
GranterJosip Juraj Strossmayer University of Osijek
Department of Chemistry
(Department of Analytical, Organic and Applied Chemistry)
Osijek
Defense date and country2017-07-13, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Organic Chemistry
Abstract
Derivati karboksilnih kiselina su organske molekule koje se jednostavnom hidrolizom mogu prevesti u karboksilne kiseline. Svi derivati karboksilnih kiselina sadrže karboksilnu skupinu, osim nitrila koji sadrže nitrilnu skupinu. Derivati karboksilnih kiselina su podijeljeni na kiselinske kloride, anhidride, estere, nitrile i amide. Najreaktivniji derivati karboksilnih kiselina su kiselinski kloridi, a najmanje reaktivni derivati su amidi. Reakcijekojimapodliježu derivati karboksilnih kiselina sureakcijenukleofilneacilnesupstitucije. Nukleofilnom acilnom supstitucijom dolazi do zamijene skupine s nukleofilom. Esteri nastaju posebnom vrstom nukleofilne acilne supstitucije koja se naziva Fischer-ova esterifikacija, to je reakcija karboksilne kiseline i alkohola u prisutnosti jake kiseline kao katalizatora. Esteri su izrazito hlapivi derivati karboksilnih kiselina, intenzivnog mirisa. Zbog svog intenzivnog mirisa estere su lako prepoznatljivi prirodni spojevi, npr. droge poput kokaina hidroliziraju dajući ester intenzivna mirisa, koji se osjeti i u malim količinama. Mnogi esteri daju specifičnu aromu i prepoznatljiv miris voću. Zasluga za aromu vina se pripisuje esterima, koji su nastali pri samoj fermentaciji ili dugim stajanjem vina.
Abstract (english)
Derivatives of carboxylic acids are organic compounds which can be converted into carboxylic acids by simple hydrolysis. All derivatives contain carbonyl group, all except nitrils which contain nitrile group. Derivatives of carboxylic acids are divided on acid chlorides, anhydrides, esters, nitriles and amides. Most reactive derivatives are acid chlorides, and least reactive are amids because they contain bad leaving group. Derivatives of carboxylic acids undergo reaction called nucleophilic acyl substitution. In nucleophilic acyl substitution a good leaving group is substituted by nucleophile. Esters are formed by specific nucleophilic acyl substitution called Fischer esterification, reaction between carboxylic acid and alcohol in presence of strong acid.Ester are extremely volatile with very intense smell. They are easily recognized because of their strong intensive smell, when drugs like cocaine in contact with water a strong smelling ester is formed and it makes it easy to recognisable even in small concentrations. Many esters are responsible for aroma and smell of fruits. Aroma of wine is thanks to presence of esters, which can be formed during fermentation or by aging wine.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:182:533070
Study programmeTitle: Chemistry
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) kemije)
Type of resourceText
File originBorn digital
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Created on2018-01-10 11:32:35