90219-33-3

Basic information

• Product Name: FeRu(CO)6(σ-N,μ2-N`,η2-C=N`-1,4-di-isopropyl-1,4-diaza-1,3-butadiene)
• Synonyms: FeRu(CO)6(σ-N,μ2-N`,η2-C=N`-1,4-di-isopropyl-1,4-diaza-1,3-butadiene)
• CAS NO: 90219-33-3
• Molecular Weight: 465.208
• Mol File: 90219-33-3.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: FeRu(CO)6(σ-N,μ2-N`,η2-C=N`-1,4-di-isopropyl-1,4-diaza-1,3-butadiene)(CAS DataBase Reference)
• NIST Chemistry Reference: FeRu(CO)6(σ-N,μ2-N`,η2-C=N`-1,4-di-isopropyl-1,4-diaza-1,3-butadiene)(90219-33-3)
• EPA Substance Registry System: FeRu(CO)6(σ-N,μ2-N`,η2-C=N`-1,4-di-isopropyl-1,4-diaza-1,3-butadiene)(90219-33-3)

Safety Data

• Hazardous Substances Data: 90219-33-3(Hazardous Substances Data)

Upstream product

• 15321-51-4 diiron nonacarbonyl 

Downstream Products

• 146401-04-9 FeRu(CO)5(P(C₆H₅)3)(((CH₃)2CH)NCHCHN(CH(CH₃)2)) 
• 147019-70-3 FeRu(CO)5(P(CH₃)2(C₆H₅))(((CH₃)2CH)NCHCHN(CH(CH₃)2)) 

Relevant articles and documents

Ruthenium carbonyl 1,4-diaza-1,3-butadiene (R-DAB) complexes. 5. Syntheses, spectroscopic properties, and reactivity of Ru2(CO)5(alkyl-DAB), a key intermediate in the Ru3(CO)12-alkyl-DAB reaction. Crystal and molecular structure of (1,4-diisopropyl-1,4-diaza-1,3-butadiene)pentacarbonyldiruthenium, Ru2(CO)5(i-Pr-DAB)

Removal of a CO group from Ru2(CO)6(R-DAB) (1) (R-DAB = 1,4-disubstituted 1,4-diaza-1,3-butadiene, RN=C-(H)C(H)=NR), by heating or by treatment with Me3NO, results in the formation of a very reactive species Ru2(CO)5(R-DAB) (2) (R = i-Pr, c-Hx, t-Bu). During this reaction the coordination of the R-DAB ligand changes from the 6e (σ-N, μ2-N′, η2-C=N′) to the 8e (σ-N, σ-N′, η2-C=N, η2-C′=N′) mode, which was demonstrated by an X-ray structure determination of Ru2(CO)5(i-Pr-DAB). Crystals of Ru2(CO)5(i-Pr-DAB) are orthorhombic with space group P212121, cell constants a = 12.775 (2) A?, b = 13.518 (3) A?, and c = 9.636 (10) A?, and Z = 4. In the refinement, 1480 reflections were used, which results in a final R value of 0.045. The single Ru(1)-Ru(2) bond (2.741 (1) A?) is spanned by an asymmetric bridging carbonyl group with Ru(1)-C(3) (2.15 (1) A?) significantly longer than Ru(2)-C(3) (2.03 (1) A?), while the C(3)-O(3) vector is almost perpendicular (87°) to the Ru(1)-Ru(2) vector. The Ru-CO(terminal) bond lengths are equal, i.e. 1.86 (1) A? (mean). The i-Pr-DAB ligand has a flat N=CC=N skeleton and is chelate bonded to Ru(2) with two equal bond lengths (2.14 (1) A?) and η2-C=N,η2-C′=N′ bonded to Ru(1) with four equal bond lengths (2.27 (1) A?). The complexes have been further characterized by 1H NMR, IR, and FD mass spectroscopy. These techniques indicated similar geometries in solution and in the solid state. Ru2(CO)5(R-DAB) (2) reacts easily with CO, yielding Ru2(CO)6(R-DAB) (1) (R = i-Pr, c-Hx, t-Bu), and with R-DAB, yielding Ru2(CO)5(R-IAE) (3) (R = i-Pr, c-Hx, t-Bu; R-IAE = bis[(R-imino)(R-amino)ethane]) and Ru2(CO)4(neo-Pe-DAB)2 (3′). Thermal decomposition of Ru2(CO)5(R-DAB) yielded the known compound Ru4(CO)8(R-DAB)2 (4) (R = i-Pr, c-Hx, neo-Pe). Reaction with Fe2(CO)9 and Ru3(CO)12 yielded the novel complexes FeRu(CO)6(R-DAB) (5) (R = i-Pr, c-Hx, t-Bu) and Ru3(CO)8(R-DAB) (6) (R = neo-Pe, i-Bu), which were characterized by FD mass, IR, and NMR spectroscopy. These reactions prove that Ru2(CO)5(R-DAB) is a key intermediate in the Ru3(CO)12-R-DAB reaction sequence as well as in the earlier developed reactions of Ru2(CO)6(R-DAB) with unsaturated molecules.