Synthesis and hydrolysis of cis-octahedral nickel(II) complexes with C-racemic tetraaza macrocycles bearing two imidate ester pendant arms

Nucleophilic reactivity and electrocatalytic reduction of halogenated organic compounds by nickel o-phenylenedioxamidate complexes

“…2e). Similar C-N and C-O bond lengths have been reported in Ni II -imidate complexes, [64][65][66] which reinforce our assignment of the complexes as the imidate ester tautomer after alkylation. Besides this, similar N-C bond lengths for the remaining unreacted parts of the ligand have been reported previously for Ni II Schiff base complexes.…”

Synthesis of Macrocyclic Nickel(II) Complexes Bearing N,N‐Disubstituted Amidine Pendant Arms: Metal‐induced CN Bond Cleavage of the Amidine Group Involving a 14‐Membered Tetraaza Macrocycle

“…The electronic absorption spectra (Table ) of [NiL 2 ](ClO 4 ) 2 and [Ni(HL 3 )](ClO 4 ) measured in nitromethane showed the d–d transition bands at ~ 510 (ε = 7.30–7.6 M / cm) and 800 nm (ε = 6.8–6.9 M / cm). The wavelengths and molar absorption coefficients are comparable to those of [NiL 4 ] 2+ and other related octahedral nickel(II) complexes . The magnetic moment (2.85–2.90 µ B at room temperature) of the nickel(II) complexes is consistent with the d 8 electronic configuration in octahedral coordination geometry.…”

“…There are two different types of amino groups in L 5 . However, the formation of [Ni(HL 3 )] 3+ is rationalized by the general trend that the mono‐ or di‐ N substitution reaction of L 5 takes place selectively at the amino groups adjacent to the mono‐methylated carbon atom . Unexpectedly, deprotonation of [Ni(HL 3 )](ClO 4 ) 3 could not be achieved even in 1.0 M NaOH aqueous solution.…”

Reduction of N-Cyanomethyl Groups on a Macrocyclic Nickel(II) Complex Using Sodium Borohydride: Synthesis of a Complex Bearing Two N-(2-Aminoethyl) Pendant Arms

“…[7][8][9][10][11][12][13][14] )](ClO 4 ) 4 2H 2 O4DMSO suitable for X-ray study were grown from water-DMSO solution. Intensity data were collected on a Rigaku R-AXIS RAPID II-S diffractometer.…”