Sequestration of Alkyltin(IV) Compounds in Aqueous Solution: Formation, Stability, and Empirical Relationships for the Binding of Dimethyltin(IV) Cation by N- and O-Donor Ligands

Table 5

Empirical parameters of (5) for the dependence of stability constants of dimethyltin(IV)/aminoacid species on ionic strength in the molar or molal concentration scales, in NaCl_aq and t = 25°C.

pqr	log 𝐾pqr^(a,b)	𝐶^(𝑏)	▵𝜀^(𝑏)
	gly
110	7.74	0.020	−0.001
111	1.90	−1.451	−1.454
11–1	5.60	0.126	0.102
	lys
110	13.74	−0.911	−0.911
111	9.00	−2.759	−2.742
112	3.61	−2.936	−2.936
11–1	6.66	1.508	1.461
	asp
110	7.99±0.07	1.194±0.015	1.165±0.009
111	2.48±0.03	0.653±0.011	0.634±0.012
11–1	5.84±0.08	0.987±0.021	0.963±0.018

(a)log 𝐾_𝑝𝑞𝑟 values at I = 0.1 (in both molar or molal concentration scales), taken as reference ionic strength; ^(b)± standard deviation; parameters for 𝑔𝑙𝑦 and 𝑙𝑦𝑠 species without errors, due to fits based on two experimental points.