Abstract
The behaviour of asparagine as ligand (L) towards cadmium(II), lead(II) and zinc(II) has been studied at 25°C with 1.00 mol L−1 NaCl as a constant ionic medium. Experimental data obtained by measuring the electromotive force of galvanic cells involving glass and amalgam electrode of cadmium, lead or zinc, respectively, are explained in terms of complex formation. The presence of CdL (log β = 3.05 ± 0.03), CdL2 (log β = 5.40 ± 0.05), CdL3 (log β = 6.15 ± 0.1) and ZnL (log β = 4.43 ± 0.03), ZnL2, (log β = 7.95 ± 0.04), ZnL3 (log β = 9.35 ± 0.07) is assumed, respectively. In the case of lead(II), it is necessary to assume also the existence of complexes formed by assumption of protons: PbL (log β = 3.60 ± 0.03), PbL2 (log β = 5.29 ± 0.05), PbHL (log β = 8.50 ± 0.1), PbH2L2 (log β = 18.70 ±0.1). The results are discussed and compared with those obtained for other amino acids.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
