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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 mol­ecular structure of compound (II). Displacement ellipsoids are drawn at the 50% probability level.
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fig2: The mol­ecular structure of compound (II). Displacement ellipsoids are drawn at the 50% probability level.

Mentions: Compound (II) is a neutral complex and crystallizes in the triclinic space group P with two formula units. The coordination sphere around the RuII atom is again a slightly distorted octa­hedron (Fig. 2 ▸). The four equatorial positions are occupied by two N atoms [Ru1—N1 = 2.105 (2) and Ru1—N2 = 2.157 (2) Å] from the Tpy-Cl ligand and by two carbonyl ligands [Ru1—C2 = 1.877 (3); Ru1—C1 = 1.895 (3) Å]. The chlorido ligands [Ru1—Cl1 = 2.3762 (8); Ru1—Cl2 = 2.4098 (7) Å] are placed at axial positions of the mol­ecule. The Ru1—N2 and Ru1—C1 bond lengths are slightly longer than Ru1—N1 and Ru1—C2 bond lengths due to the steric strain generated by the non-coordinating pyridine ring (Table 2 ▸).


Ruthenium(II) carbonyl compounds with the 4 ′ -chloro-2,2 ′ :6 ′ ,2 ′ ′ -terpyridine ligand
The mol­ecular structure of compound (II). Displacement ellipsoids are drawn at the 50% probability level.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig2: The mol­ecular structure of compound (II). Displacement ellipsoids are drawn at the 50% probability level.
Mentions: Compound (II) is a neutral complex and crystallizes in the triclinic space group P with two formula units. The coordination sphere around the RuII atom is again a slightly distorted octa­hedron (Fig. 2 ▸). The four equatorial positions are occupied by two N atoms [Ru1—N1 = 2.105 (2) and Ru1—N2 = 2.157 (2) Å] from the Tpy-Cl ligand and by two carbonyl ligands [Ru1—C2 = 1.877 (3); Ru1—C1 = 1.895 (3) Å]. The chlorido ligands [Ru1—Cl1 = 2.3762 (8); Ru1—Cl2 = 2.4098 (7) Å] are placed at axial positions of the mol­ecule. The Ru1—N2 and Ru1—C1 bond lengths are slightly longer than Ru1—N1 and Ru1—C2 bond lengths due to the steric strain generated by the non-coordinating pyridine ring (Table 2 ▸).

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.