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undergraduate thesis
Sinteza i karakterizacija Schiffovih baza s aminobenzojevim kiselinama
2019. urn:nbn:hr:182:914971
Lastrić, Adrijana
Josip Juraj Strossmayer University of Osijek
Department of Chemistry
Department of General, Inorganic and Physical Chemistry and Methodology of Chemistry

Cite this document

Lastrić, A. (2019). Sinteza i karakterizacija Schiffovih baza s aminobenzojevim kiselinama (Undergraduate thesis). Retrieved from https://urn.nsk.hr/urn:nbn:hr:182:914971

Lastrić, Adrijana. "Sinteza i karakterizacija Schiffovih baza s aminobenzojevim kiselinama." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2019. https://urn.nsk.hr/urn:nbn:hr:182:914971

Lastrić, Adrijana. "Sinteza i karakterizacija Schiffovih baza s aminobenzojevim kiselinama." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2019. https://urn.nsk.hr/urn:nbn:hr:182:914971

Lastrić, A. (2019). 'Sinteza i karakterizacija Schiffovih baza s aminobenzojevim kiselinama', Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, accessed 15 March 2023, https://urn.nsk.hr/urn:nbn:hr:182:914971

Lastrić A. Sinteza i karakterizacija Schiffovih baza s aminobenzojevim kiselinama [Undergraduate thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry; 2019 [cited 2023 March 15] Available at: https://urn.nsk.hr/urn:nbn:hr:182:914971

A. Lastrić, "Sinteza i karakterizacija Schiffovih baza s aminobenzojevim kiselinama", Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, Osijek, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:182:914971

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Metadata
TitleSinteza i karakterizacija Schiffovih baza s aminobenzojevim kiselinama
Title (english)Synthesis and characterization of Schiff bases derived from aminobenzoic acids
AuthorAdrijana Lastrić
MentorTomislav Balić (mentor)
GranterJosip Juraj Strossmayer University of Osijek
Department of Chemistry
(Department of General, Inorganic and Physical Chemistry and Methodology of Chemistry)
Osijek
Defense date and country2019-09-27, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Inorganic Chemistry
Abstract
Supstituiran imin zove se Schiffova baza, koja strukturno, dušični je analog aldehida ili ketona u kojem je karbonilna skupina ( C=O ) zamijenjena iminskom skupinom (C=N) , dvostruka veza ugljik-dušik. Sinteza Schiffove baze reverzibilna je reakcija, u kojoj se kao reaktanti mogu koristiti dialdehidi i aminobenzojeve kiseline. Efikasnost ovakve reakcije kontrolirana je pomoću dva glavna čimbenika koji imaju velik utjecaj na iskorištenje. Koncentracija kiseline ne bi smjela biti prevelika ( pH između 4 i 5 ), potrebni su blago kiseli uvjeti u kojima dolazi do gubitka vode, u suprotnom , ako je otopina prekisela , dolazi do protoniranja amina , što inhibira prvi stupanj - reakcija se ne može nastaviti. Dialdehidi organski su spojevi koji nastaju reakcijama intermolekularne kondenzacije i reakcijama polimerizacije. Sadrže dvije aldehidne grupe i u reakcijama s aminobenzojevim kiselinama tvore dvostruku C=N vezu na obje skupine. Sintetizirati ih možemo iz aldehida i dugolančanih halogenalkana pri određenim uvjetima reakcije ( visokoj temperaturi uz etanol kao otapalo ). Aminobenzojeve kiseline organski su kod kojih je amino skupina – \( NH_{2}\) vezana na benzenski prsten benozjeve kiseline na tri različita mjesta. Postoje tri izomera aminobenzojevih kiselina, a to su oroto-aminobenzojeva kiselina, meta-aminobenzojeva kiselina i para-aminonezojeva kiselina. Upotrebom kiselog medija dolazi do deporotoniranja dušika aminoskupine ovih izomera , te on reagira s karbonilinom skupinom dialdehida i nastaje imino dvostruka C=N veza. IR spektroskopija daje nam podatke o vibracijskim vezama čime se dokazuje prisutnost funkcijskih skupina. Temelji se na apsorpciji svjetlosti infracrvenog zračenja pri čemu se mjeri količina zračenja koju spoj apsorbira u ovisnosti o valnoj duljini. Infracrveni spektrometar temeljen na Fourireovoj transformaciji ( FT-IR) koristi se interferometrom za dobivanje spektra, u kojem su sadržane sve važne informacije. Spektar Schiffovih baza pokazuje vibracije istezanja veze C=N ( imino skupine ) u rasponu od 1680-1600 \(cm^{-1} \). Spektar je uspoređen sa spektrom dialdehida i aminobenojevim kiselinama.
Abstract (english)
The substituted imine is called the Schiff base, which, structurally, is a nitrogen analog of an aldehyde or ketone, in which the carbonyl group (C=O) is replaced by an imine group (C=N), a carbon-nitrogen double bond. Schiff base synthesis is a reversible reaction in which dialdehydes and aminobenzoic acids can be used as reactants. The efficacy of these reactions is controlled by two main factors that have a large impact on yield. The acid concentration shouldn't be to high ( pH between 4 and 5), slightly acidic conditions are required in which water loss occurs, opposite of that, if the solution is too acidic, the amine is protonated, which inhibits the first stage – the reaction cannot continue. Dialdehydes are organic compounds formed by intermolecular condensation reactions and polymerization reactions. They contain two aldehyde groups and in the reactions with aminobenzoic acids they form a double C=N bond with both groups. Dialdehydes can be synthesized form aldehydes and long-chain halogenalkanes under certain reactions conditions ( high temperature with ethanol as solvent). Aminobenzoic acids are organic compounds at which the amino group- \( NH_{2}\) is attached to the benzene ring of benzoic acid at three different sites. There are Three isomers of aminobenzoic acids, namely orto-aminobenzoic acid, meta-aminobenzoic acid and para-aminobenzoic acid. The use of acidic medium, deprotonates the nitrogen of the amino group of these isomers, and they reacts with the carbonyl group of the dialdehyde to form am inmino double C=N bond. IR spectroscopy provides us withs information on vibrational connections, which provest he presence of functional groups. Iti s based on the absorption of light by infrared radiation, which measures the amount of radiation absorbed by a compound as a function of wavelength. An infrared spectrometer based on the Fourire transform (FT-IR) is used by important information. The spectrum of Schiff bases shows vibrations of the C=N bond ( imino group) in the range 1680 – 1600 \(cm^{-1} \). The spectrum was comapred with the dialdehyde spectrum and aminobenzoic acids.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:182:914971
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 on2019-12-05 10:28:53