6533b828fe1ef96bd1288387

RESEARCH PRODUCT

Structural diversity within analogous compounds: syntheses and studies of M(SCH2CH2NH2)Cl (M = Zn, Cd, Hg).

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The novel complexes [Zn(L)Cl] (1), [Cd(L)Cl] (2), [Hg(L)Cl] (3), {[Hg(L)Cl]·NaOH·2H 2 O} (3·NaOH·2H 2 O), and {[Hg 3 (HL) 2 Cl 6 ]·2H 2 O} (4) (L = -SCH 2 CH 2 NH 2 ) were prepared and investigated by means of IR spectroscopy and single-crystal X-ray diffraction. The crystal structures of 1, 2, and 3·NaOH·2H 2 O show chelating N,S-coordination of the cysteaminate ligand, bridging S, and terminally coordinating Cl. Apart from these common features, the coordination geometries and modes of intermolecular association are different. 1 forms a cyclic tetramer with a Zn 4 S 4 ring, and 3·NaOH·2H 2 O contains one-dimensional [Hg(L)Cl] n chains with S-bridged Hg atoms. Zn and Hg atoms in 1 and 3·NaOH·2H 2 O are tetracoordinate with a distorted tetrahedral M(CINS 2 ) geometry (M = Zn, Hg). Each Cd atom of 2 binds to three S atoms and vice versa, such that layers of distorted Cd 3 S 3 hexagons are formed. 2 is the first example for a compound exhibiting a group 12-group 16 layer structure, which can be described as an analogue of a graphite layer. Additionally, each Cd atom binds to a chlorine atom and a nitrogen atom from a cysteaminate ligand resulting in pentacoordination with a distorted trigonal bipyramidal Cd(CINS 3 ) geometry. 4 contains two differently coordinate Hg atoms. One displays a distorted trans-octahedral Hg(Cl 4 S 2 ) geometry, while the other is coordinated by four Cl atoms and one S atom and additionally forms a long Hg···Cl contact.