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Synthesis, Solid-state and Solution Structures of Bis(N,N'-bis-1,2-diaminoethane)-silver(I) and -copper(I) Trifluoromethanesulfonate Complexes

DOI: 10.1039/DT9950004021

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 4021 - 4028 (1995)

Update date:2022-08-17

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Authors:

Modder, Johan F.Modder, Johan F.

Leijen, Ronald J.Leijen, Ronald J.

Vrieze, KeesVrieze, Kees

Smeets, Wilberth J. J.Smeets, Wilberth J. J.

Spek, Anthony L.Spek, Anthony L.

Koten, Gerard vanKoten, Gerard van

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Article abstract of DOI:10.1039/DT9950004021

Reaction of 2 equivalents of the thienyl ketimines <(SC4H3)CR=N>2C2H4 (R = Me or SC4H3) with 1 equivalent of M'(O3SCF3) (M = Ag or Cu) resulted in formation of stable 2C2H4)2> complexes.The crystal structures of 2C2H4)2> and 2C2H4)2> have been determined.Both unit cells contain discrete anions and, basically isostructural, complex cations.The co-ordination sphere of the metal(I) centre is dominated by four imine N atoms provided by two symmetrically, bidentate co-ordinating <(SC4H3)CR=N>2C2H4 ligands.Four thiophene S atoms are also in proximity of the metal nucleus , but do not co-ordinate.The AgN4 geometry is flattened, as indicated by the spatial geometry of the four donor atoms, and tends more to square planar than to the usual tetrahedral arrangement.The CuN4 geometry is slightly compressed from tetrahedral.A characteristic of these complexes is their very low solubility which makes further spectroscopic studies difficult.Various 1H NMR experiments have established that the complex cations are isostructural, having a tetrahedral co-ordination geometry similar to that found in the crystals, comprising symmetrically co-ordinating, bidentate ligands.There are no indications that the solution structure is compressed.The solution structure is only kinetically stable at low temperatures ( View More

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