Bis(2,2′,2′′-nitrilotriacetamide-κ³O,N,O′)nickel(II) dinitrate tetrahydrate

Abstract

In the title compound, [Ni(C6H12N4O3)2](NO3)2·4H2O, the NiII cation is located on an inversion center and is N,O,O′-chelated by two nitrilo­tris­(acetamide) mol­ecules in a distorted octa­hedral geometry. The complex cations, nitrate anions and lattice water mol­ecules are connected by O—H⋯O and N—H⋯O hydrogen bonds, forming a three-dimensional supra­molecular structure.

A diversity of hydrogen bond motifs in the crystal structures of nickel(II) and copper(II) complexes with N-arylalkyliminodiacetamides

“…The Ni-N and Ni-O bond distances (N and O atoms from Bnimda and Peimda) in 1, 2 and 3 are in accordance with the corresponding Table 5 Hydrogen bond geometry for 1, 2, 3, 5 and 6. [5] and nitrilotriacetamide [13]. The Cu-N and Cu-O bond distances (N and O atoms from Bnimda and Peimda) in 5 and 6 are also in accordance with the corresponding ones reported in the literature for copper(II) complex with iminodiacetamide [4].…”

“…Nickel(II) and copper(II) complexes with iminodiacetamide and its N-arylalkyl derivatives are very scarce in the literature, as a few of them are known e. g. nickel(II) complexes with iminodiacetamide [5] and nitrilotriacetamide [13] and a copper(II) complex with iminodiacetamide [4]. Therefore, complexes 1-7 are among the first nickel(II) and copper(II) complexes with N-arylalkyliminodiacetamides that were prepared and structurally characterized.…”

“…Several complexes of Ca(II), Cd(II), Hg(II), Pb(II), La(III) and some lanthanoids (Eu, Tb, Tm) with nitrilotriacetamide (ntam) or ethylenediaminetetraacetamide (edtam) are known [1][2][3][7][8][9][10][11]; in all these complexes the iminodiacetamide ligands act as O,N,O 0 -chelators. With the exception of Co(II) [12] and Ni(II) [13] complexes with nitrilotriacetamide, no transition metal complexes with any N-alkylated iminodiacetamide were structurally described until now.…”

Tuning the coordination properties of chiral pseudopeptide bis(2-picolyl)amine and iminodiacetamide ligands in Zn(ii) and Cu(ii) complexes

“…35 In the only reported crystal structure of a ML 2 complex with a bpa ligand featuring an amide group in the side chain, the amide is part of a phthalimide group. 42 In two trans-fac ML 2 complexes of unsubstituted imda ligands, 43,44 the side chain amides participate in H-bonding networks connecting the complex cations. However, in a trans-fac ML 2 complex of a benzyl substituted tripodal imda ligand, the amides interact with nitrate anions or water molecules, but not the neighboring complex cations.…”