Table 3. Acid reactions with triiron nitride/imide 2 (step 1).

Entry	Acid	pKa in THF	Yield of 3 e	LFeX product e
1	C6H5C CH		59%	7a (34%)
2	(CF3)2C6H2C CH		99%	7b (ND) i
3	CH3(CH2)5C CH		0 f	—
4	TEMPOH		89% g	—
5	[LutH]Cl	9.5 a	63% g	[LFe(μ-Cl)]2 (63%)
6	[LutH]BArF4	9.5 a	16% g , h	[LFe(μ-Cl)]2 (12%)
7	C6H5CO2H	19.5 b	22% f	—
8	Indene	20.1 c	51% h	8 (78%)
9	t Bu3C6H2OH	27.8 d	78% h	2 (71%)
10	H2O	31.2 c	41% g , h	6 (5%)
11	MeOH	41.2 b	32% g	—

^a Ref. 23.

^bCalculated value, ref. 24.

^cpK_a in DMSO, ref. 22.

^dCalculated value for C₆H₅OH, ref. 24.

^eYields determined by ¹H NMR spectroscopy.

^fLFe(η⁶-toluene) product also formed.

^gUnidentified by-products are also observed.

^hTriiron nitride/amide 4 is also formed as a minor product.

ⁱYield not determined due to low solubility.