Discrete molecular and extended polymeric copper(I) halide complexes of tetradentate thioether macrocycles

Brooks, N. R., Blake, A. J., Champness, N. R., Cooke, P. A., Hubberstey, P., Proserpio, D. M., Wilson, C. and Schröder, M. (2001) Discrete molecular and extended polymeric copper(I) halide complexes of tetradentate thioether macrocycles. Journal of the Chemical Society: Dalton Transactions, 2001(4), pp. 456-465. (doi:10.1039/b008202n)

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Abstract

A series of complexes of copper(I) halides with either [12]aneS4 (1,4,7,10-tetrathiacyclododecane) or [16]aneS4 (1,5,9,13-tetrathiacyclohexadecane) have been synthesized, characterised and their crystal structures determined. Discrete molecular entities of formula [CuX([12]aneS4)] (X = Cl, Br or I) were isolated from solutions containing a 1 ∶ 1 metal ∶ ligand stoichiometry. In [CuX([12]aneS4)] (X = Br or I) the copper(I) centres adopt a rare square pyramidal geometry. Located on fourfold axes of symmetry, the copper(I) centres are co-ordinated by one halide ion [Cu–Br 2.4209(11) or Cu–I 2.573(5) Å] and four sulfur atoms [2.5386(12) (X = Br) and 2.521(5) Å (X = I)]. In contrast, the copper(I) centres in [CuCl([12]aneS4)] adopt the more common tetrahedral co-ordination geometry, which is provided by one chloride ion [Cu–Cl 2.2666(13) Å] and three sulfur donors [Cu–S 2.3331(13), 2.3326(13), 2.4720(11) Å]. Polymeric materials, [Cu4Br4([12]aneS4)2]∞, [Cu4I4([12]aneS4)]∞ and [Cu2I2([16]aneS4)]∞, were obtained from reactions in which metal ∶ ligand stoichiometries of 2 ∶ 1 and 4 ∶ 1 were used. [Cu4Br4([12]aneS4)2]∞ contains a previously uncharacterised copper(I) halide motif of formula Cu4X4 which is derived from the common Cu4X4 cubane tetramer and the Cu4X4 step-cubane tetramer. These Cu4X4 clusters are linked by [12]aneS4 molecules to generate a two-dimensional framework [Cu–Br 2.410(2)–2.539(2); Cu–S 2.318(3)–2.385(3) Å]. In [Cu4I4([12]aneS4)]∞, Cu4I4 cubane tetramers are linked by tetradentate [12]aneS4 molecules to give a two-dimensional sheet structure [Cu–I 2.602(1)–3.021(1); Cu–S 2.285(1)]. In [Cu2I2([16]aneS4)]∞ an infinite three-dimensional co-ordination polymer comprising Cu2I2 rhomboid dimers linked by tetradentate [16]aneS4 molecules is formed [Cu–I 2.5972(9)–2.6702(9); Cu–S 2.292(2)–2.357(2) Å]. The Cu2I2 moiety acts as a pseudo-square planar linker while the bridging [16]aneS4 units afford tetrahedral building blocks to give overall a PtS type structure for the polymer.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Wilson, Dr Claire
Authors: Brooks, N. R., Blake, A. J., Champness, N. R., Cooke, P. A., Hubberstey, P., Proserpio, D. M., Wilson, C., and Schröder, M.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Journal of the Chemical Society: Dalton Transactions
Publisher:Royal Society of Chemistry
ISSN:0300-9246
ISSN (Online):2050-5671
Published Online:31 January 2001

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