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Ruthenium(II) carbonyl compounds with the 4 ′ -chloro-2,2 ′ :6 ′ ,2 ′ ′ -terpyridine ligand

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ABSTRACT

Two ruthenium carbonyl complexes with the 4′-chloro-2,2′:6′,2′′-terpyridine ligand (tpy-Cl, C15H10ClN3), i.e. [RuCl(tpy-Cl)(CO)2][RuCl3(CO)3] (I) [systematic name: cis-di­carbonyl­chlorido(4′-chloro-2,2′:6′,2′′-terpyridine-κ3N)ruthenium(II) fac-tricarbonyltri­chlorido­ruthenate(II)], and [RuCl2(tpy-Cl)(CO)2] (II) [cis-dicarbonyl-trans-di­chlorido(4′-chloro-2,2′:6′,2′′-terpyridine-κ2N1,N1′)ruthenium(II)], were synthesized and characterized by single-crystal X-ray diffraction. The RuII atoms in both centrosymmetric structures (I) and (II) display similar, slightly distorted octa­hedral coordination spheres. The coordination sphere in the complex cation in compound (I) is defined by three N atoms of the tridentate tpy-Cl ligand, two carbonyl carbon atoms and one chlorido ligand; the charge is balanced by an octa­hedral [Ru(CO)3Cl3]− counter-anion. In the neutral compound (II), the tpy-Cl ligand coordinates to the metal only through two of its N atoms. The coordination sphere of the RuII atom is completed by two carbonyl and two chlorido ligands. In the crystal structures of both (I) and (II), weak C—H⋯Cl inter­actions are observed.

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The crystal packing of (I) in a view along the b axis.
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fig3: The crystal packing of (I) in a view along the b axis.

Mentions: The packing of mol­ecules (I) and (II) are dominated by van der Waals inter­actions; packing plots are displayed in Fig. 3 ▸ for (I) and Fig. 4 ▸ for (II). Only weak hydrogen bonds and π–π contacts can be found in these structures. In both (I) and (II), some non-conventional hydrogen bonds between the aromatic C—H hydrogen atoms and chlorido ligands of neighboring mol­ecules do exist. The shortest contacts are summarized in Tables 3 ▸ and 4 ▸. In addition to these hydrogen bonds, the aromatic rings in structure (I) are involved in weak face-to-face π–π-inter­actions with considerable offsets. The shortest inter­molecular C—C distances range from 3.23 to 3.50 Å. In (II), an edge-to-face contact exists between C3—H3 and C16 of the neighboring mol­ecule. The distance between H3 and C16 is 2.89 Å and the angle C3—H3⋯C16 amounts to 134°. All inter­actions considered, three-dimensional network structures are obtained both for (I) and (II).


Ruthenium(II) carbonyl compounds with the 4 ′ -chloro-2,2 ′ :6 ′ ,2 ′ ′ -terpyridine ligand
The crystal packing of (I) in a view along the b axis.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5382621&req=5

fig3: The crystal packing of (I) in a view along the b axis.
Mentions: The packing of mol­ecules (I) and (II) are dominated by van der Waals inter­actions; packing plots are displayed in Fig. 3 ▸ for (I) and Fig. 4 ▸ for (II). Only weak hydrogen bonds and π–π contacts can be found in these structures. In both (I) and (II), some non-conventional hydrogen bonds between the aromatic C—H hydrogen atoms and chlorido ligands of neighboring mol­ecules do exist. The shortest contacts are summarized in Tables 3 ▸ and 4 ▸. In addition to these hydrogen bonds, the aromatic rings in structure (I) are involved in weak face-to-face π–π-inter­actions with considerable offsets. The shortest inter­molecular C—C distances range from 3.23 to 3.50 Å. In (II), an edge-to-face contact exists between C3—H3 and C16 of the neighboring mol­ecule. The distance between H3 and C16 is 2.89 Å and the angle C3—H3⋯C16 amounts to 134°. All inter­actions considered, three-dimensional network structures are obtained both for (I) and (II).

View Article: PubMed Central - HTML - PubMed

ABSTRACT

Two ruthenium carbonyl complexes with the 4′-chloro-2,2′:6′,2′′-terpyridine ligand (tpy-Cl, C15H10ClN3), i.e. [RuCl(tpy-Cl)(CO)2][RuCl3(CO)3] (I) [systematic name: cis-di­carbonyl­chlorido(4′-chloro-2,2′:6′,2′′-terpyridine-κ3N)ruthenium(II) fac-tricarbonyltri­chlorido­ruthenate(II)], and [RuCl2(tpy-Cl)(CO)2] (II) [cis-dicarbonyl-trans-di­chlorido(4′-chloro-2,2′:6′,2′′-terpyridine-κ2N1,N1′)ruthenium(II)], were synthesized and characterized by single-crystal X-ray diffraction. The RuII atoms in both centrosymmetric structures (I) and (II) display similar, slightly distorted octa­hedral coordination spheres. The coordination sphere in the complex cation in compound (I) is defined by three N atoms of the tridentate tpy-Cl ligand, two carbonyl carbon atoms and one chlorido ligand; the charge is balanced by an octa­hedral [Ru(CO)3Cl3]− counter-anion. In the neutral compound (II), the tpy-Cl ligand coordinates to the metal only through two of its N atoms. The coordination sphere of the RuII atom is completed by two carbonyl and two chlorido ligands. In the crystal structures of both (I) and (II), weak C—H⋯Cl inter­actions are observed.

No MeSH data available.


Related in: MedlinePlus