Related Experiment Video
Updated: Aug 23, 2026

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
Carbonyl(5-nitrotropolonato-kappa2O1,O2)(triphenylphosphine-kappaP)rhodium(I)
1Department of Chemistry and Biochemistry, Rand Afrikaans University, Johannesburg 2006, South Africa.
Abstract:
The molecule of the title complex, [Rh(5-NO2trop)(C18H15P)(CO)] (5-NO2trop is 2-hydroxy-5-nitrocyclohepta-2,4,6-trienone, C7H4NO4), has a distorted square-planar geometry. Strong intramolecular and weak intermolecular hydrogen bonding is observed, with H...O distances of the order of 2.25 and 2.55 A, respectively. The Rh-CO, Rh-O (trans to CO), Rh-O (trans to P) and Rh-P bond distances are 1.775 (7), 2.072 (4), 2.068 (4) and 2.2397 (17) A, respectively, the O-Rh-O angle is 77.09 (16) degrees and the bidentate O-C-C-O torsion angle is 1.5 (7) degrees.
More Related Videos
Related Concept Videos
ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH3
Carbocations
Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
meta-Directing Deactivators: –NO2, –CN, –CHO, –⁠CO2R, –COR, –CO2H
Reactions of α-Halocarbonyl Compounds: Nucleophilic Substitution
Nucleophilic Addition to the Carbonyl Group: General Mechanism
A stronger nucleophile can directly attack the electrophilic center, the carbonyl carbon. The HOMO orbital of the nucleophile interacts with the LUMO (π* antibonding) orbital present on the carbonyl carbon. This interaction breaks the π bond and shifts the π bonding...

