Kinetic and Mechanistic Studies on the Interaction of Glycyl-L-alanine, Glycyl-L-asparagine, and Glycyl-L-tyrosine with Hydroxopentaaquarhodium(III) Ion

Table 2

10⁵𝑘_2(obs) (s⁻¹) values for different dipeptide concentrations at different temperatures; [Complex A] = 2.5 × 10⁻⁴ mol dm⁻³, pH = 4.3, ionic strength = 0.1 mol dm⁻³ NaClO₄.

Ligand	Temperature (°C )	10^3 [Ligand] (mol dm^−3)
		2.50	3.75	5.00	6.25	7.50
L^1-L′H	50	2.91	3.41	3.69	3.86	3.98
	55	4.39	5.17	5.75	6.03	6.19
	60	6.91	8.43	9.22	9.75	10.03
	65	10.86	12.66	14.97	16.43	16.71
L^2-L′H	50	2.71	3.08	3.34	3.50	3.57
	55	4.22	4.93	5.38	5.71	5.99
	60	6.37	7.69	8.55	9.09	9.26
	65	9.98	12.50	13.51	14.29	16.10
L^3-L′H	50	2.79	3.22	3.51	3.65	3.76
	55	4.24	5.00	5.56	5.85	6.06
	60	6.58	8.06	8.85	9.35	9.62
	65	10.64	12.50	14.29	15.87	16.13