Naslov
Nucleofugalities of pyridine in different solvents

Autori
Jurić, Sandra ; Matić, Mirela ; Denegri, Bernard ; Marijan, Marijan ; Kronja, Olga

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
XXIII. Hrvatski skup kemičara i kemijskih inženjera - Knjiga sažetaka / Hadžiev, Andrea ; Blažeković, Zdenko - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2013, 166-166

ISBN
978-953-6894-50-5

Skup
XXIII. Hrvatski skup kemičara i kemijskih inženjera

Mjesto i datum
Osijek, Hrvatska, 21.04.2013. - 24.04.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
solvolysis; pyridine; nucleofugality

Sažetak
Nucleofugalites of pyridine leaving group in various solvents have been derived from the SN1 solvolysis rate constants of corresponding X, Y-benzhydrylpyridinium perchlorates by applying the LFER equation: log k = sf (Ef + Nf), in which: k is a first-order rate constant for SN1 reaction, sf (slope of the log k / Ef correlation line) and Nf (nucleofugality ; negative intercept on the abscissa) are nucleofuge specific parameters, and Ef is the electofugality parameter. It has been found that the changes of the Nf parameters of pyridine leaving group with the solvent composition are in an opposite direction compared to those obtained for anionic leaving groups. A decrease of the Nf parameters of pyridine with polarity of solvents is due to solvation effects of the salts in the ground state which is in accord with the results obtained for dimethylsulfide and tetrahydrothiophene as leaving group.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA