Lithium bis(iminodiacetato)nickelate(II) tetrahydrate and cesium bis(iminodiacetato)nickelate(II) tetrahydrate

Abstract

The coordination around Ni is in the shape of a distorted octahedron, and the two five-membered rings which result from the coordination of each ida molecule are not planar or equivalent by symmetry; this distortion is related to the bond strain and H atom repulsion within each ida molecule. The two salts are not isostructural.

Diaquaiminodiacetatonickel(II)

“…Unlike iminodiacetatocopper(II), a compound that forms a large number of coordination complexes, as well as complexes with metal salts (Roma  n-Alpiste et al, 1999), the nickel(II) analog is much less studied, and the crystal structure of iminodiacetatonickel(II) has not been reported. The limited number of derivatives of this compound comprise the trihydrated 1:1 complex of dipotassium bis(iminodiacetato)nickelate (Agre et al, 1984), caesium bis-(iminodiacetato)nickelate tetrahydrate (Mammano et al, 1977), lithium bis(iminodiacetato)nickelate tetrahydrate (Kramarenko et al, 1974;Mammano et al, 1977) and the only N-heterocycle adduct, tris(imidazole)iminodiacetatonickel hydrate (Polyakova et al, 2000).…”

Al(iii)-binding properties of iminodiacetic acid, nitrilotriacetic acid and their mixed carboxylic–phosphonic derivatives

“…In this case, it should further be noted that the coordination environment created by the two ligands is such that the two imino nitrogens are cis to each other. Examples of a similar cis arrangement of the nitrogens in the coordinated iminodiacetate ligands include 34 An exception in this structural chemistry appears to be the case of the analogous Ni( 35 which contains the nitrogens on the two coordinated ligands in a trans arrangement.…”

Structure of tri(2H)aqua(N-methyliminodiacetato)nickel(II) (2H)monohydrate, [Ni(C5H7NO4)(D2O)3].D2O

“…The most commonly observed type of ligation is tridentate binding with a facial orientation of the ida ligand. This coordination geometry has been observed in bis(ligand) complexes (Corradi, Palmieri, Nardelli, Pellinghelli & Vidoni Tani, 1973;Kramarenko, Polynova, Porai-Koshits, Chalyi & Mitrofanova, 1973;Mammano, Templeton & Zalkin, 1977;Mootz & Wunderlich, 1980a,b,c), and in 1:1 metal:ligand complexes with either strongly donating ligands [e.g.…”

“…Atomic positions and isotropic thermal parameters are listed in Table 1. Selected bond lengths and angles are given in Table 2 (2) is seen in the bis(ida) species (Mammano et al, 1977). …”