European Journal of Chemistry 2018, 9(1), 49-56. doi:10.5155/eurjchem.9.1.49-56.1682

Complexation equilibria of ambroxol hydrochloride in solution by potentiometric and conductometric methods


Ahmed Hosny Naggar (1,*) orcid , Hammed Mohammed Al-Saidi (2) orcid , Othman Abd El-Moaty Farghaly (3) orcid , Taher Mohammed Hassan (4) orcid , Salma Zaidan Mohamed Bortata (5) orcid

(1) Chemistry Department, Faculty of Science, Al-Azhar University, Assiut Branch, 71524, Assiut, Egypt
(2) Department of Chemistry, University College in Al-Jamoum, Umm Al-Qura University, 21955, Makkah, Kingdom of Saudi
(3) Chemistry Department, Faculty of Science, Al-Azhar University, Assiut Branch, 71524, Assiut, Egypt
(4) Chemistry Department, Faculty of Science, Sebha University, Sebha, Libya
(5) Chemistry Department, Faculty of Science, Sebha University, Sebha, Libya
(*) Corresponding Author

Received: 04 Jan 2018, Accepted: 06 Mar 2018, Published: 31 Mar 2018

Abstract


The formation constants of Li(I), Mg(II), Sr(II), Ca(II), Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), Ba(II), Pb(II), Al(III), Cr(III), Fe(III) and Th(IV) ions with ambroxol hydrochloride (AMB) were calculated using the half-n value. In presence of 0.1 M NaNO3, metal ions such as Zn(II), Cd(II), Ni(II), Cr(III), Li(I), Mg(II) and Al(III) forms three types of metal-ligand complexes (1:1, 1:2 and/or 1:3), while Sr(II) and Co(II) tend to form two types of metal complexes 1:1 and 1:2 (M:L). For ligand protonation constants, two logarithmic association constant values were calculated by the half-n method and are 10.7 and 7.6, respectively. The effect of ionic strength on stability constant of AMP, with different metal ions viz. Fe(III), Th(IV), Al(III), Cr(III) and Cu(II) was studied. Based on relationship between the ionic strength studied values and the 1st stability constants (Log K1H), we can conclude that the stability constants of the formed metal-ligand complex (1:1) were decreased as the ionic strength increased. The stoichiometry of the formed complexes in solution were determined by conductometric method and it is found to be of 1:1, 1:2 and/or 1:3 (M:L) complex species is formed in alkaline media. Also, study the species distribution diagrams of AMP for the calculated mole fraction αML and αML2 were discussed.


Keywords


Potentiometry; Conductometry; Metal complexes; Stability constants; Ambroxol hydrochloride; Species distribution diagrams

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DOI: 10.5155/eurjchem.9.1.49-56.1682

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How to cite


Naggar, A.; Al-Saidi, H.; Farghaly, O.; Hassan, T.; Bortata, S. Eur. J. Chem. 2018, 9(1), 49-56. doi:10.5155/eurjchem.9.1.49-56.1682
Naggar, A.; Al-Saidi, H.; Farghaly, O.; Hassan, T.; Bortata, S. Complexation equilibria of ambroxol hydrochloride in solution by potentiometric and conductometric methods. Eur. J. Chem. 2018, 9(1), 49-56. doi:10.5155/eurjchem.9.1.49-56.1682
Naggar, A., Al-Saidi, H., Farghaly, O., Hassan, T., & Bortata, S. (2018). Complexation equilibria of ambroxol hydrochloride in solution by potentiometric and conductometric methods. European Journal of Chemistry, 9(1), 49-56. doi:10.5155/eurjchem.9.1.49-56.1682
Naggar, Ahmed, Hammed Mohammed Al-Saidi, Othman Abd El-Moaty Farghaly, Taher Mohammed Hassan, & Salma Zaidan Mohamed Bortata. "Complexation equilibria of ambroxol hydrochloride in solution by potentiometric and conductometric methods." European Journal of Chemistry [Online], 9.1 (2018): 49-56. Web. 22 Sep. 2019
Naggar, Ahmed, Al-Saidi, Hammed, Farghaly, Othman, Hassan, Taher, AND Bortata, Salma. "Complexation equilibria of ambroxol hydrochloride in solution by potentiometric and conductometric methods" European Journal of Chemistry [Online], Volume 9 Number 1 (31 March 2018)

DOI Link: https://doi.org/10.5155/eurjchem.9.1.49-56.1682

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