NDLI: Influence of Dielectric Constant on Protonation Equilibria of l-Proline and l-Valine in Acetonitrile

Please wait, while we are loading the content...

Influence of Dielectric Constant on Protonation Equilibria of l-Proline and l-Valine in Acetonitrile–Water Mixtures

Content Provider	Springer Nature Link
Author	Bhushanavathi, P. Nageswara Rao, G. Veera Swami, B. Viplava Prasad, U.
Copyright Year	2012
Abstract	Protonation equilibria of l-proline and l-valine in varying compositions (0.0–60.0 % v/v) of acetonitrile–water mixtures were investigated pH-metrically. Titrations were performed at 303.0 K and the ionic strength of the medium was maintained at 0.16 mol l$^{−1}$ using sodium chloride. The protonation constants have been calculated with the computer program MINIQUAD 75 and are selected based on statistical parameters. The best fit chemical models of the protonation equilibria were based on crystallographic R-factor, χ$^{2}$, skewness and kurtosis. All the protonation constants of l-proline and l-valine increase with increasing acetonitrile content. This is attributed to the dielectric constant of the medium.
Starting Page	283
Ending Page	289
Page Count	7
File Format	PDF
ISSN	03698203
Journal	Proceedings of the National Academy of Sciences, India Section A: Physical Sciences
Volume Number	82
Issue Number	4
e-ISSN	22501762
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-05-26
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	l-Valine Applied and Technical Physics Protonation equilibria Acetonitrile Atomic, Molecular, Optical and Plasma Physics Quantum Physics l-Proline MINIQUAD75 Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Biochemistry, Genetics and Molecular Biology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in