Table 3. Thermodynamics for [Tp^But,Me]MgY/Me₃SiX halogen exchange reactions.

Reactants a	Products a	K
[Mg]F + Me3SiCl	[Mg]Cl + Me3SiF	>1000 b
[Mg]Cl + Me3SiBr	[Mg]Br + Me3SiCl	13.4 ± 1.2 b
[Mg]Br + Me3SiI	[Mg]I + Me3SiBr	0.93 ± 0.15 b
[Mg]F + Me3SiI	[Mg]I + Me3SiF	>12 500 c
[Mg]Cl + Me3SiI	[Mg]I + Me3SiCl	12.5 c
[Mg]Br + Me3SiI	[Mg]I + Me3SiBr	0.93 b
[Mg]I + Me3SiI	[Mg]I + Me3SiI	1 d

^a[Mg] = [Tp^But,Me]Mg.

^bExperimental value.

^cDerived from experimentally measured K values.

^dDefined value.