Pentaamine(nitrogen)ruthenium(II) chloride is an
inorganic compound
An inorganic compound is typically a chemical compound that lacks carbon–hydrogen bondsthat is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as ''inorganic chemistry''.
Inorgan ...
with the formula
3)5(N2)">u(NH3)5(N2)l
2. It is a nearly white solid, but its solutions are yellow. The cationic complex is of historic significance as the first compound with N
2 bound to a metal center.
3)5(N2)">u(NH3)5(N2)sup>2+ adopts an
octahedral structure with C
4v symmetry.
Preparation and properties
Pentaamine(nitrogen)ruthenium(II) chloride is synthesized in an aqueous solution from pentaamminechlororuthenium(III) chloride,
sodium azide
Sodium azide is an inorganic compound with the formula . This colorless salt is the gas-forming component in some car airbag systems. It is used for the preparation of other azide compounds. It is highly soluble in water and is acutely poisonou ...
, and
methanesulfonic acid:
[Allen, A. D., Bottomley, F., Harris, R. O., Reinsalu, V. P., Senoff, C. V. "Pentaammine(Nitrogen)Ruthenium(II) Salts and Other Ammines of Ruthenium" ''Inorganic Syntheses'', 2007, volume 12, pp. 2-8. ]
:
3)5Cl">u(NH3)5Cll
2 + NaN
3 →
3)5N2">u(NH3)5N2l
2 + ...
If it is to be used ''in situ'', the cation can be made more conveniently from ruthenium(III) chloride and hydrazine hydrate:
[
:RuCl3 + 4 N2H4 → 3)5N2">u(NH3)5N2sup>2+ + ...
This N2 complex is stable in aqueous solution and has a relatively low ligand exchange rate with water. Being a d6 complex, the Ru-N bond is stabilized by the ]pi backbonding
In chemistry, pi backbonding or π backbonding is a π-bonding interaction between a filled (or half filled) orbital of a transition metal atom and a vacant orbital on an adjacent ion or molecule. In this type of interaction, electrons from the ...
, the donation of metal d-electrons into the N2 π* orbitals. The related metal ammine complex 3)5(N2)">s(NH3)5(N2)sup>2+ is also known.
Reactions
The dinitrogen ligand is not reduced by aqueous sodium borohydride. Nearly all known reactions of this compound are displacement reactions. Pentaamine(halogen)ruthenium(II) halides can be synthesized by treating 3)5N2">u(NH3)5N2sup>2+ with halide sources:[
: 3)5N2">u(NH3)5N2sup>2+ + X− → 3)5X">u(NH3)5Xsup>+ + N2
3)5N2">u(NH3)5N2sup>2+ forms the symmetrically bridging symmetrical dinitrogen complex 3)5Ru-NN-Ru(NH3)5">NH3)5Ru-NN-Ru(NH3)5sup>4+.][{{cite journal, doi=10.1351/pac197024020425 , title=Molecular Nitrogen as a Ligand , date=1970 , last1=Chatt , first1=J. , journal=Pure and Applied Chemistry , volume=24 , issue=2 , pages=425–442 ]
References
Ruthenium complexes
Chlorides
Coordination complexes
Ammine complexes
Ruthenium(II) compounds
Nitrogen compounds