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ABSTRACT: Two d10 transition-metal complexes having racemic and enantiomeric 1,2,2-trimethylcyclopentane-1,3-diamine ligands, [Zn(La)2](NO3)2 · CH3CH2OH (1) and [Cd(Lb)2Cl](ClO4) (2) (La = D,L-1,2,2-trimethylcyclopentane-1,3-diamine, Lb = D-(+)-1,2,2-trimethylcyclopentane-1,3-diamine or (1R,3S)-1,2,2-trimethylcyclopentane-1,3-diamine), were synthesized and characterized by X-ray single-crystal diffraction. They crystallize in the Pbca and P212121 space groups, respectively, and have different coordination numbers and coordination geometry (four-coordinate tetrahedron for Zn(II) in 1 and five-coordinate square-based pyramid for Cd(II) in 2) mainly due to their different ionic radii.
Journal of Coordination Chemistry 07/2009; 62(13):2086-2094. · 1.55 Impact Factor
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ABSTRACT: The reaction between 4′-chloro-2,2′ : 6′,2″-terpyridine (tpyCl) with d10 transition-metal ions produced two cadmium(II) and two zinc(II) metal complexes, formulated as [Cd(tpyCl-κ 3 N,N′,N″)(NO3-κ 2 O,O′)(NO3-κO)(H2O-κO)] (1), [Cd(tpyCl-κ 3 N,N′,N″)2](ClO4)2 (2), [Zn(tpyCl-κ 3 N,N′,N″)2](ClO4)2 (3), and [Zn(tpyCl-κ 3 N,N′,N″)2](BF4)2 (4). Supramolecular interactions include coordinative bonding, O–H ··· O, O–H ··· Cl, C–H ··· F, and C–H ··· Cl hydrogen bonding and π–π stacking, all of which play essential roles in forming different frameworks of 1–4.
Journal of Coordination Chemistry. 07/2009; 62(13):2125-2137.
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ABSTRACT: In the title salt, C(4)H(8)N(5) (+)·NO(3) (-), a ring N atom of 2,6-diamino-4-methyl-triazine is protonated. Each anion is connected to three neighbouring cations by multiple N-H⋯O hydrogen bonds which, together with N-H⋯N contacts, generate a layer structure.
Acta Crystallographica Section E Structure Reports Online 01/2009; 65(Pt 3):o494. · 0.35 Impact Factor
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ABSTRACT: The tetra-nuclear copper(II) title complex, [Cu(4)Cl(2)(OH)(4)(C(10)H(8)N(2))(4)](NO(3))(2)·6H(2)O, has a crystallographically imposed centre of symmetry. The metal atoms display a distorted tetragonal-pyramidal coordination geometry, and are linked by two μ(2)- and two μ(3)-hydroxo groups, assuming a chair-like conformation for the Cu(4)O(2) core. In the crystal, the complex mol-ecules are linked into a three-dimensional network by inter-molecular O-H⋯O, O-H⋯Cl, C-H⋯O and C-H⋯Cl hydrogen bonds and π-π stacking inter-actions with centroid-centroid separations of 3.724 (2) and 3.767 (3) Å.
Acta Crystallographica Section E Structure Reports Online 01/2009; 65(Pt 2):m131-2. · 0.35 Impact Factor
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ABSTRACT: The title compound, C(7)H(4)Cl(2)O(2), exhibits a layer crystal structure; mol-ecules within each layer are linked by weak C-H⋯O inter-molecular hydrogen bonds. There is also an intramolecular O-H⋯O hydrogen bond.
Acta Crystallographica Section E Structure Reports Online 01/2008; 64(Pt 6):o1080. · 0.35 Impact Factor
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ABSTRACT: In the title compound, [Cu(C(7)H(3)Cl(2)O(2))(2)](n), the Cu(II) atom lies on a centre of inversion and adopts a [4+2] coordination mode, with two long axial Cu-Cl coordinative bonds complementing four Cu-O bonds from two 2,4-dichloro-6-formyl-phenolate ligands in a distorted square plane. π-π stacking inter-actions are also formed between neighbouring aromatic rings, with a centroid-centroid separation of 3.624 (2) Å.
Acta Crystallographica Section E Structure Reports Online 01/2008; 64(Pt 8):m1011. · 0.35 Impact Factor
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ABSTRACT: The title compound, C(7)H(4)Br(2)O(2), exhibits a layer packing structure via weak π-π stacking inter-actions [centroid-centroid distances between adjacent aromatic rings are 4.040 (8) and 3.776 (7) Å]. Mol-ecules in each layer are linked by inter-molecular O-H⋯O hydrogen bonding and Br⋯Br inter-actions [3.772 (4) Å]. There are two mol-ecules in the asymmetric unit.
Acta Crystallographica Section E Structure Reports Online 01/2008; 64(Pt 5):o799. · 0.35 Impact Factor
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ABSTRACT: In the title salt, C(7)H(8)N(3) (+)·HSO(4) (-), the benzimdazole ring system is planar [mean deviation 0.0086 (1) Å]. In the crystal, N-H⋯O and O-H⋯O hydrogen-bond inter-actions give rise to a layer motif.
Acta Crystallographica Section E Structure Reports Online 01/2008; 65(Pt 1):o115. · 0.35 Impact Factor
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Polyhedron 29(3):1149-1155. · 2.06 Impact Factor
