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Metal Complexes as Ligands. Part 12. Synthesis and X-Ray Crystal Structure of a Hexanuclear Nickel(II) Complex based on two Isosceles Trinuclear Components with Imidazolate Bridges

DOI: 10.1039/DT9890001187

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1187 - 1192 (1989)

Update date:2022-08-03

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Authors:

Thanyasiri, ThitinantThanyasiri, Thitinant

Sinn, EkkSinn, Ekk

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Article abstract of DOI:10.1039/DT9890001187

The new ligand H2L, derived from 5-chloro-2-hydroxybenzophenone, o-phenylenediamine, and imidazole-2-carbaldehyde, forms an insoluble, apparently polymeric nickel(II) complex, which can dissociate and act as a monodentate ligand via a ring nitrogen donor.It forms a 2:1 adduct with nickel hexafluoroacetylacetonate, Ni(hfacac)2, with a toluene molecule in the hollow of the V-shaped trinuclear fragment.The central nickel is octahedral with two hfacac ligands and two cis-bonded NiL complex ligands, to form an isosceles triangle of nickel atoms, of dimensions 5.754 * 5.783 * 6.407 Angstroem.The overall structure is hexanuclear, consisting of two trinuclear subunits joined by two weak (2.908 Angstroem) Ni-O links between NiL complex ligands. <(NiL)2Ni(hfacac)2>2*2C6H5Me crystallizes in space group P1 with a = 16.044(6), b = 15.939(4), c = 14.971(9) Angstroem, α = 78.33(4), β = 72.09(5), γ = 63.56(6) deg, and Z = 1; R = 0.065 for 4660 reflections.

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