You are here

Home » Content

Bazı α-Amino Asitlerin Etil- ve Metil- Esterlerinin Protonasyon Sabitlerinin Su Ortamında Potansiyometrik Yöntemle Tayini

Determination of Protonation Constants of Some Ethyl- and Methyl- Esters of α-Amino Acids in Water by Potentiometric Method

Journal Name:

  • Gazi Eğitim Fakültesi Dergisi

Publication Year:

  • 2001

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In this study, the protonation constants of ethyl- and methyl- esters of glycine, L-alanine, L-valine, L-leucine, L-phenylalanine, L-serine, L-methionine were determined by potentiometric titration method in water. The titrations were performed at 25°C, in nitrogen atmosphere and during the titrations ionic strength ofthe medium was maintained at 0.1M by using sodium chloride. The data of potentiometric titration were evaluated by PKAS computer programme and effects of alkyl group on the basicity of α-amino acid esters are discussed.
Bookmark/Search this post with
Abstract (Original Language): 
Bu çalışmada, glisin, L-alanin, L-valin, L-lösin, L-fenilalanin, L-serin ve L-metioninin etil ve metil esterlerinin protonasyon sabitleri su ortamında potansiyometrik titrasyon yöntemi ile tayin edilmiştir. Titrasyonlar 25°C’ ta, azot atmosferinde ve 0,1 M NaCl’lü ortamda yapılmıştır. Potansiyometrik titrasyon verilerinden yararlanarak PKAS bilgisayar programıile stokiyometrik protonasyon sabitleri hesaplanmışve amino asit esterlerinin bazikliği yönünden tartışılmıştır.
FULL TEXT (PDF): 
PDF icon arastirmax-bazi-amino-asitlerin-etil-metil-esterlerinin-protonasyon-sabitlerinin-su-ortaminda-potansiyometrik-yontemle-tayini.pdf
  • 3
121-130
  • Turkish

REFERENCES

References: 

Edsall, J.T. and Blanchard M.H., J.Am. Chem. Soc.,59, 2337, 1933.
Gran, G., Acta.Chem.Scand., 4, 559, 1950.
Gran, G.,Analyst, 77, 661, 1952.
Hughes, D.L., Bergan, J. And Grabowski, E.J., J.Org.Chem.,51, 2579, 1986.
Kratz, L., Die Glasselectrode and ihre anwen dungen verlag von D. Steinkoff.
Frankfurt, 1950
Martell, A.E and Motekaitis, R.J., The determination and use of stability constants,
VCH, Weinheim, 1988.
May, P., Williams, D.R and Torrinton, R.G., Talanta, 29, 249, 1982
Motekaitis, R.J and Martell, A.E., Can. J. Chem. 168, 1982
Rosotti, I.J.C and Rosotti, H., J. Chem. Educ., 42, 375, 1965.
Serjeant, E.P., 1984, Potentiometry and potentiometric titrations, John Wiley and Sons
New York.

Thank you for copying data from http://www.arastirmax.com