Fig. 2: Synthesis and characterization of NiII complexes. | Nature Communications

Fig. 2: Synthesis and characterization of NiII complexes.

From: Characterization of paramagnetic states in an organometallic nickel hydrogen evolution electrocatalyst

Fig. 2: Synthesis and characterization of NiII complexes.

a Synthesis of non C–H activated complex 1 and its proposed structure on dissolution in acetonitrile. b Synthesis of C–H activated complexes 2-Br and 2. ORTEP representations (50% probability ellipsoids) for 1 (c) and 2-Br (d). Selected bond distances for 1: Ni1–N1 2.001(6), Ni1–O4 2.039(5), Ni1–O1 2.043(4), Ni1–S1 2.391(2), Ni1–S2 2.407(2), Ni1–C1 2.478(8), N1–H1 2.299, N1–H1–C1 89.61, and 2-Br: Ni–N1 2.042(1), Ni–C1 1.980(1), Ni–S1 2.3759(5), Ni–S2 2.3899(5), Ni–Br1 2.5487(4), Ni–Br1a 2.720(4). e Cyclic voltammogram of 1 mM of 1 in 0.1 M TBAPF6/MeCN in a N2-saturated solution (scan rate = 0.1 V/s). f 1H NMR spectrum of 1 in CD3CN showing the peaks corresponding to the aromatic and methylene protons.

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