Table 3. Measured product distribution (in %) of fluorosilicates obtained by ¹⁹F-NMR signal integration after >36 h in CD₂Cl₂ between the reactants given in column 1 ^a .

[F-Si(catX)2]– + Si(catY)2	[F-Si(catX)2]–	[F-Si(catY)2]–	[F-Si(catX) (catY)]–	rel. FIAsol
X = H, Y = tBu	65	<1	35	H > tBu
X = tBu, Y = H	<1	70	30
X = H, Y = F	20	76	4	F > H
X = F, Y = H	>99	<1	0
X = tBu, Y = F	<1	72	28	F > tBu
X = F, Y = tBu	>99	<1	<1
X = F, Y = Cl	21	27	52	Cl > F
X = Cl, Y = F	49	8	43
X = F, Y = Br	17	30	53	Br > F
X = Br, Y = F	55	5	40
X = Cl, Y = Br	20	29	51	Br > Cl
X = Br, Y = Cl	58	4	38

^a0.05 M of [K@18-c-6][F-Si(cat^X)₂] and 0.05 M Si(cat^Y)₂ in CD₂Cl₂, room temp., min. 36 h equilibration time, for Y = Cl and Br, the CH₃CN adducts were used.