Ruthenocene
<templatestyles src="Chembox/styles.css"/>
Template:Chembox image cellTemplate:Chembox AllOtherNamesTemplate:Chembox headerbarTemplate:Chembox IndexlistTemplate:Chembox JmolTemplate:Chembox ChEMBLTemplate:Chembox ECHATemplate:Chembox E numberTemplate:Chembox IUPHAR ligandTemplate:Chembox UNIITemplate:Chembox CompToxTemplate:Chembox headerbarTemplate:Chembox SolubilityInWaterTemplate:Chembox headerbarTemplate:Chembox GHS (set)Template:Chembox headerbarTemplate:Chembox Datapage checkTemplate:Chembox Footer| Template:Chembox image sbs cell | |
| Template:Longitem | Template:Unbulleted list |
| ChEBI | Template:Unbulleted list |
| ChemSpider | Template:Unbulleted list |
| DrugBank | Template:Unbulleted list |
| EC Number | Template:Unbulleted list |
| Template:Longitem | 3469 |
| KEGG | Template:Unbulleted list |
| Template:Longitem | Template:Unbulleted list |
| RTECS number | Template:Unbulleted list |
| Script error: No such module "collapsible list". | |
| Script error: No such module "collapsible list". | |
| Template:Longitem | C10H10Ru |
| Molar mass | 231.26 g/mol |
| Appearance | pale yellow powder |
| Density | 1.86 g/cm3 (25 °C) |
| Melting point | Template:Chembox CalcTemperatures |
| Boiling point | Template:Chembox CalcTemperatures |
| NFPA 704 (fire diamond) | Template:NFPA 704 diamond |
| Template:Longitem | cobaltocene, nickelocene, chromocene, ferrocene, osmocene, bis(benzene)chromium |
Template:Chembox Footer/trackingScript error: No such module "TemplatePar".Template:Short description
Ruthenocene is an organoruthenium compound with the formula (C5H5)2Ru. This pale yellow, volatile solid is classified as a sandwich compound and more specifically, as a metallocene.
Structure and bonding
Ruthenocene consists of a ruthenium ion sandwiched in between two cyclopentadienyl rings. It features ruthenium centre bound symmetrically to the planes of two cyclopentadienyl rings. It is closely related to the isoelectronic ferrocene.
In contrast to ferrocene, wherein the cyclopentadienyl rings are in a staggered conformation, those of ruthenocene crystallise with an eclipsed conformation. This difference is due to the larger ionic radius of ruthenium, which increases the distance between the cyclopentadienyl rings, decreasing steric interactions and allowing an eclipsed conformation to prevail. In solution, these rings rotate with a very low barrier.
Preparation
Ruthenocene was first synthesized in 1952 by Geoffrey Wilkinson, a Nobel laureate who had collaborated in assigning the structure of ferrocene only a year earlier.[1] Originally, ruthenocene was prepared by the reaction of ruthenium trisacetylacetonate with excess of cyclopentadienylmagnesium bromide.[1]
- Ru(acac)3 + C5H5MgBr → Ru(C5H5)2 + 3 "acacMgBr" + "C5H5"
Ruthenocene may also be prepared by the reaction of sodium cyclopentadienide with "ruthenium dichloride" prepared in situ by reduction of ruthenium trichloride.[2][3]
Chemical properties
Ruthenocene typically oxidises via two electron change, instead of one.[4] With weakly coordinating anions as electrolyte, the oxidation proceeds via a 1e step.[5]
Ruthenocene has been investigated as a photoinitiator for polymerization reactions.[6]
References
<templatestyles src="Reflist/styles.css" />
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Geiger, W. E. and Barrière, F., "Organometallic Electrochemistry Based on Electrolytes Containing Weakly-Coordinating Fluoroarylborate Anions", Accounts of Chemical Research, 2010. Script error: No such module "CS1 identifiers"..
- ↑ Cynthia T. Sanderson, Bentley J. Palmer, Alan Morgan, Michael Murphy, Richard A. Dluhy, Todd Mize, I. Jonathan Amster, and Charles Kutal "Classical Metallocenes as Photoinitiators for the Anionic Polymerization of an Alkyl 2-Cyanoacrylate" Macromolecules 2002, volume 35, pp. 9648-9652.Script error: No such module "CS1 identifiers".
Script error: No such module "Check for unknown parameters".
Template:Ruthenium compounds Template:Cyclopentadienide complexes