Demetallation of a Ni(II) tetraazamacrocyclic complex by cyanoxime resulting in the formation of a stereospecific trinuclear compound [Na(H2O)6]+[NaNi2L6]-(L = NC-C(NO)-C(O)NH )

Abstract

The reaction between the NiA(ClO4)2 and NaHL2 {where A=14ane[N4], the macrocyclic ligands derived from the product of template condensation of 2,6-diacetylpyridine with aliphatic 3,3'-diaminodipropylamine, NH2(CH2)3NH(CH2)3NH2; and L=2-cyano-2-isonitrosoacetamide anion, ACO-(amidecyanoxime, NCC(NO)-C(O)NH2-)} has led to the formation of a highly unusual trimetallic bis-[fac-(triscyanoximato) nickel(II)] anionic complex anion instead of the expected Ni(II) macrocyclic complex with coordinated cyanoxime ligands. Two equivalent and symmetric trigonal-prismatic NiL3- units are connected to form the [NaNi2L6]- anion by the presence of a central sodium cation. The latter is located between two NiL3- anions and has an octahedral NaO6 geometry comprised of oxygen atoms of the nitroso group of the cyanoxime ligand. The oxime ligand is planar and adopts a cis-anti configuration in the complex.

Department(s)

Chemistry and Biochemistry

Document Type

Article

DOI

https://doi.org/10.1080/00958970412331312652

Keywords

cyanoximes, nickel(II), X-ray analysis

Publication Date

2004

Journal Title

Journal of Coordination Chemistry

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