Structural characterization and comparison of [Ru2(O2CR)2(CO)4L2]
Resource
Journal of Organometallic Chemistry 452 (1-2): 143-149
Journal
Journal of Organometallic Chemistry
Journal Volume
452
Journal Issue
1-2
Pages
143-149
Date Issued
1993
Author(s)
Abstract
The structures of [Ru2(CO)4(O2CR)2(PPh3)2](R Me (1), Ph (2), and CF3 (3)) have been determined by X-ray crystallography: 1, monoclinic, C2/c, a = 24.630(8), b = 9.2476(21), c = 18.735(4) Å, β = 101.710(20)°, Z = 4, R = 0.026, RW = 0.025, based on 3243 reflections with I≫ 2σ,(I); 2, orthorhombic, P212121, a = 12.590(3), b = 18.188(3), c = 20.804(5) Å, Z = 4, R = 0.033, RW = 0.026, based on 3410 reflections with I ≫ 2σ,(I); 3, triclinic, P1, a = 12.7329(19), b = 13.450(4), c = 13.7939(20) Å, a = 76.770(16), β = 73.305(14), γ = 76.017(16)°, Z = 2, R = 0.054, RW = 0.047, based on 5543 reflections with I ≫ 2σ,(I). The RuRu bond lenGths are 2.7360(9) Å in 1, 2.7411(8) Å in 2, and 2.7276(9) Å in 3. Comparison of these structures with those of other dinuclear RuI structures of the general formula [Ru2(O2CR)2(CO)4L2] (L CO. PPh3, PBu3, py, H2O, or PhCO2H; R Me, CF3, nPr, or 4-FC6H4) or of [Ru2(O2CPh)2(CO) 4]∞ reported to date leads to the conclusion that the axial ligand is the most influential in determining the lenGth of the RuRu single bond, and that the equatorial ligand is responsible for the secondary effect. © 1993.
SDGs
Type
journal article