fac-[RuCl2(DMSO-S)3(n-butylamine)]: Synthesis, structural characterization and dual catalytic performance

Silva, Tiago; Martins, Daniele M.; Gois, Patrik D.S.; Borim, Patrícia Aparecida; Maia, Pedro Ivo da Silva; Carvalho, Valdemiro P.; Neto, Benedito dos Santos Lima

doi:10.1016/j.inoche.2019.107749

Cited by 1 publication

(4 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additional characterizations of complex [RuCl 2 (p-cymene)(pip)] (2) was discussed in order to complete the early presented studies and to better understand its reactivity in the current purpose. [40] Complexes 1-3 exhibited almost identical FT-IR, UV-Vis, and NMR spectra, which is consistent with the fact that they have similar structures of η 6 -p-cymene-Ru (II)Cl 2 -amine. Typical vibration bands in the FT-IR spectra of the complexes confirm the presence of amine and p-cymene ligands in the isolated compounds (Supporting Information Figure S1).…”

Section: Resultssupporting

confidence: 78%

“…Since all the complexes display similar spectral properties, complexes 1 and 2 are assumed to have the same structure as 3. In fact, the crystal structure of [RuCl 2 (η 6 -p-cymene)(piperidine)] (2) was previously reported, [40] showing similar bond lengths and angles to those of 3. However, computational studies were performed to compare their structures and other properties.…”

Section: S C H E M Ementioning

confidence: 60%

“…The [RuCl 2 (p-cymene)] 2 and [RuCl 2 (p-cymene)(piperidine)] complexes were prepared following the literature and their purity was checked by satisfactory elemental analysis and spectroscopic examination (NMR, Fourier transform infrared [FT-IR] spectroscopy and Electron Paramagnetic Resonance [EPR]). [40,41]…”

Section: General Remarksmentioning

confidence: 99%

“…In our research group, noncarbene ruthenium-based complexes have been studied for ROMP and ATRP. [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] Many of these compounds have exhibited good activity, forming polymers and copolymers in high yields, with different thermal and morphological characteristics. Among these precatalysts, ruthenium amine compounds have produced polymers from norbornene (NBE) and norbornadiene (NBD) by ROMP and controlled methyl methacrylate (MMA) and styrene (St) polymerization via ATRP.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dual catalytic performance of arene‐ruthenium amine complexes for norbornene ring‐opening metathesis and methyl methacrylate atom‐transfer radical polymerizations

Cruz

Silva

Oliveira

et al. 2020

Applied Organom Chemis

Self Cite

View full text Add to dashboard Cite

Arene ruthenium(II) complexes bearing the cyclic amines RuCl2(η6‐p‐cymene)(pyrrolidine)] (1), [RuCl2(η6‐p‐cymene)(piperidine)] (2), and [RuCl2(η6‐p‐cymene)(peridroazepine)] (3) were successfully synthesized. Complexes 1–3 were fully characterized by means of Fourier transform infrared, UV–visible, and NMR spectroscopy, elemental analysis, cyclic voltammetry, computational methods, and one of the complexes was further studied by single crystal X‐ray crystallography. These compounds were evaluated as catalytic precursors for ring‐opening metathesis polymerization (ROMP) of norbornene (NBE) and atom‐transfer radical polymerization (ATRP) of methyl methacrylate (MMA). NBE polymerization via ROMP was evaluated using complexes 1–3 as precatalysts in the presence of ethyl diazoacetate (EDA) under different [NBE]/[EDA]/[Ru] ratios, temperatures (25 and 50°C), and reaction times (5–60 min). The highest yields of polyNBE were obtained with [NBE]/[EDA]/[Ru] = 5000/28/1 for 60 min at 50°C. MMA polymerization via ATRP was conducted using 1–3 as catalysts in the presence of ethyl‐α‐bromoisobutyrate (EBiB) as initiator. The catalytic tests were evaluated as a function of the reaction time using the initial molar ratio of [MMA]/[EBiB]/[Ru] = 1000/2/1 at 95°C. The increase in molecular weight as function of time indicates that complexes 1–3 were able to mediate the MMA polymerization with an acceptable rate and some level of control. Differences in the rate of polymerization were observed in the order 3 > 2 > 1 for the ROMP and ATRP.

show abstract

Section: Resultssupporting

confidence: 78%

Section: S C H E M Ementioning

confidence: 60%

Section: General Remarksmentioning

confidence: 99%