{2-[(E)-(2-Chlorophenoxyacetyl)hydrazonomethyl]phenolato}(imidazolyl)nickel(II)

Abstract

Key indicatorsSingle-crystal X-ray study T = 295 K Mean (C-C) = 0.005 Å R factor = 0.033 wR factor = 0.085 Data-to-parameter ratio = 15.4For details of how these key indicators were automatically derived from the article, see

Orientation and Stereodynamic Paths of Planar Monodentate Ligands in Square Planar Nickel N2S Complexes

“…The conclusion that the shift toward coplanarity of imidazole and nickel planes in the N 2 ONiN imid virtual complexes is a result of an internal electrostatic interaction is consistent with the experimental structures of a set of square planar Ni II complexes of tridentate, truncated Schiff base units that show greater variation in imidazole ligand orientation with respect to the tridentate ligand−metal plane. Ten such molecular structures are to be found in the Cambridge Crystallographic Database, six of which are shown in Figure ; four others are given in Supporting Information, Figure S9. − None were characterized for imidazole fluxionality by VT NMR solution studies as in our study above. The Ni II −Schiff base complexes containing hard O-donors cis to the unsubstituted imidazole monodentate ligand, complexes (a) and (b) in Figure , find coplanarity in the nickel complex plane and the plane of the imidazole ligand.…”

“…Ten such molecular structures are to be found in the Cambridge Crystallographic Database, six of which are shown in Figure 12; four others are given in Supporting Information, Figure S9. [33][34][35][36][37][38][39][40][41] None were characterized for imidazole fluxionality by VT NMR solution studies as in our study above. The Ni II -Schiff base complexes containing hard O-donors cis to the unsubstituted imidazole monodentate ligand, complexes (a) and (b) in Figure 12, find coplanarity in the nickel complex plane and the plane of the imidazole ligand.…”

“…Nevertheless, DFT computations suggest an intramolecular donor/acceptor interaction between the imidazole C−H and the thiolate S is operative in determining the stability of the ground state and transition state structures. A structural survey of square planar imidazole Ni complexes of tridentate ONO, ONN, ONS, and NNS Schiff base type ligands shows the importance of this effect in the presence of hard oxygen donors cis to the imidazole. − …”

“…A structural survey of square planar imidazole Ni complexes of tridentate ONO, ONN, ONS, and NNS Schiff base type ligands shows the importance of this effect in the presence of hard oxygen donors cis to the imidazole. [33][34][35][36][37][38][39][40][41]…”

A novel one-dimensional copper(II) coordination polymer and a trinuclear nickel(II) complex with a one-dimensional hydrogen-bonded structure

“…Long, and presumably weak, bonding interactions between Cu II and ether oxygen have also been encountered in the complex [Cu(dboa)(C 6 H 5 NH 2 )] 2 Á-C 6 H 5 NH 2 [H 2 dboa is 2,2 0 -(1,2-phenylenedioxy)diacetic acid], in which the corresponding distance is 2.484 Å (McCann et al, 1995). However, in reported metal-hydrazone complexes containing phenoxy groups, these potential donors have not been found to coordinate to the metal atoms (Chen, 2008;Chen & Liu, 2004, 2006Gao et al, 2004;Li & Liu, 2004;Sun et al, 2005;Wang & Lian, 2013;Xiao, 2009;Zhang, 2006). Furthermore, these hydrazone ligands tend to form discrete metal compounds.…”