. Author manuscript; available in PMC: 2015 Oct 13.

Published in final edited form as: Inorg Chem. 2015 May 22;54(19):9256–9262. doi: 10.1021/acs.inorgchem.5b00645

Table 2.

Ammonia Generation from N₂ Mediated by Co Precursors^a


Entry	Co complex	NH₃ equiv/Co
A	[(TPB)Co(N₂)][Na(12-c-4)₂] (2)	2.4 ± 0.3^b
B	(TPB)Co(N₂) (1)	0.8 ± 0.3
C	[(TPB)Co][BAr^F₄] (3)	1.6 ± 0.2
D	(TPB)CoBr	0.7 ± 0.4
E	(SiP₃)Co(N₂) (4)	<0.1
F	(CP₃)Co(N₂) (5)	0.1 ± 0.1
G	[(NArP₃)CoCl][BPh₄]	<0.1
H	(PBP)Co(N₂)	0.4 ± 0.2
I	Co(PPh₃)₂I₂	0.4 ± 0.1
J	CoCp₂	0.1 ± 0.1
K	Co₂(CO)₈	<0.1

Co precursors at −78 °C under an N₂ atmosphere treated with an Et₂O solution containing 47 equiv [H•(OEt₂)₂][BAr^F₄] followed by an Et₂O suspension containing 60 equiv KC₈. Yields are reported as an average of 3 iterations; data for individual experimental iterations presented in Supporting Information.

Average of 6 iterations.