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Unexpected formation and crystal structure of tetra-kis-(1H-pyrazole-κN (2))-palladium(II) dichloride.

Wagner T, Christiansen N, Hrib CG, Kaufmann DE, Edelmann FT - Acta Crystallogr Sect E Struct Rep Online (2014)

Bottom Line: The two chloride anions are not coordinating to Pd(2+).They are connected to the complex cations through N-H⋯Cl hydrogen bonds.In addition, C-H⋯Cl hydrogen bonds are observed, leading to a three-dimensional linkage of cations and anions.

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Affiliation: Chemisches Institut, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, D-39106 Magdeburg, Germany.

ABSTRACT
The title salt, [Pd(C3H4N2)4]Cl2, was obtained unexpectedly by the reaction of palladium(II) dichloride with equimolar amounts of 1-chloro-1-nitro-2,2,2-tris-(pyrazol-yl)ethane in methanol solution. The Pd(2+) cation is located on an inversion centre and has a square-planar coordination sphere defined by four N atoms of four neutral pyrazole ligands. The average Pd-N distance is 2.000 (2) Å. The two chloride anions are not coordinating to Pd(2+). They are connected to the complex cations through N-H⋯Cl hydrogen bonds. In addition, C-H⋯Cl hydrogen bonds are observed, leading to a three-dimensional linkage of cations and anions.

No MeSH data available.


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A packing diagram of the title compound. Dashed lines indicate N—H⋯Cl hydrogen-bonding inter­actions.
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fig3: A packing diagram of the title compound. Dashed lines indicate N—H⋯Cl hydrogen-bonding inter­actions.

Mentions: In the title compound, the crystal packing is stabilized by two N—H⋯Cl hydrogen bonds (Table 1 ▶) between the complex cations and the Cl− counter-anions (Fig. 3 ▶). Weaker C—H⋯Cl hydrogen bonds are also observed, stabilizing a three-dimensional network. The crystal structures of the formally analogous complexes [M(pyrazole)4Cl2] show related features. In the structures with M = Mn and Cu and an octa­hedral coordination of the metal cation, the crystal structures likewise exhibit N—H⋯Cl and C—H⋯Cl hydrogen bonds which, in combination, yield three-dimensional networks.


Unexpected formation and crystal structure of tetra-kis-(1H-pyrazole-κN (2))-palladium(II) dichloride.

Wagner T, Christiansen N, Hrib CG, Kaufmann DE, Edelmann FT - Acta Crystallogr Sect E Struct Rep Online (2014)

A packing diagram of the title compound. Dashed lines indicate N—H⋯Cl hydrogen-bonding inter­actions.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4257448&req=5

fig3: A packing diagram of the title compound. Dashed lines indicate N—H⋯Cl hydrogen-bonding inter­actions.
Mentions: In the title compound, the crystal packing is stabilized by two N—H⋯Cl hydrogen bonds (Table 1 ▶) between the complex cations and the Cl− counter-anions (Fig. 3 ▶). Weaker C—H⋯Cl hydrogen bonds are also observed, stabilizing a three-dimensional network. The crystal structures of the formally analogous complexes [M(pyrazole)4Cl2] show related features. In the structures with M = Mn and Cu and an octa­hedral coordination of the metal cation, the crystal structures likewise exhibit N—H⋯Cl and C—H⋯Cl hydrogen bonds which, in combination, yield three-dimensional networks.

Bottom Line: The two chloride anions are not coordinating to Pd(2+).They are connected to the complex cations through N-H⋯Cl hydrogen bonds.In addition, C-H⋯Cl hydrogen bonds are observed, leading to a three-dimensional linkage of cations and anions.

View Article: PubMed Central - HTML - PubMed

Affiliation: Chemisches Institut, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, D-39106 Magdeburg, Germany.

ABSTRACT
The title salt, [Pd(C3H4N2)4]Cl2, was obtained unexpectedly by the reaction of palladium(II) dichloride with equimolar amounts of 1-chloro-1-nitro-2,2,2-tris-(pyrazol-yl)ethane in methanol solution. The Pd(2+) cation is located on an inversion centre and has a square-planar coordination sphere defined by four N atoms of four neutral pyrazole ligands. The average Pd-N distance is 2.000 (2) Å. The two chloride anions are not coordinating to Pd(2+). They are connected to the complex cations through N-H⋯Cl hydrogen bonds. In addition, C-H⋯Cl hydrogen bonds are observed, leading to a three-dimensional linkage of cations and anions.

No MeSH data available.


Related in: MedlinePlus