Ruthenium(II) complexes containing triphenylphosphine/triphenylarsine and bidentate Schiff bases derived from 2-hydroxy-1-naphthaldehyde and primary amines

Balasubramanian, K. P.; Chinnusamy, V.; Karvembu, Ramasamy; Natarajan, K.

doi:10.1007/s11243-004-4993-8

Cited by 8 publications

(4 citation statements)

References 21 publications

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“…All of the complexes have a medium to strong band in the region 1944–1932 cm –1 , which is attributed to the terminally coordinated carbonyl group (CO), appearing at a somewhat higher frequency than the precursor complexes . In the spectra of the complexes, the distinctive absorption bands due to PPh 3 /AsPh 3 were also observed in the predicted regions. , …”

Section: Resultsmentioning

confidence: 86%

“… 32 In the spectra of the complexes, the distinctive absorption bands due to PPh 3 /AsPh 3 were also observed in the predicted regions. 33 , 34 …”

Section: Resultsmentioning

confidence: 99%

“…32 In the spectra of the complexes, the distinctive absorption bands due to PPh 3 /AsPh 3 were also observed in the predicted regions. 33,34 The electronic spectra of the complexes were obtained in a chloroform solution in the range 200−800 nm (see the Supporting Information, Figures S19−S27) and displayed three intense absorption bands at 250−560 nm. In the complexes' spectra, the presence of a band in the region 260− 327 nm was designated as a ligand centered (LC) transition.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Ruthenium Complexes Bearing α-Diimine Ligands and Their Catalytic Applications in N-Alkylation of Amines, α-Alkylation of Ketones, and β-Alkylation of Secondary Alcohols

et al. 2022

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New Ru(II) complexes encompassing α-diimine ligands were synthesized by reacting ruthenium precursors with α-diimine hydrazones. The new ligands and Ru(II) complexes were analyzed by analytical and various spectroscopic methods. The molecular structures of L 1 and complexes 1 , 3 , and 4 were determined by single-crystal XRD studies. The results reveal a distorted octahedral geometry around the Ru(II) ion for all complexes. Moreover, the new ruthenium complexes show efficient catalytic activity toward the C–N and C–C coupling reaction involving alcohols. Particularly, complex 3 demonstrates effective conversion in N-alkylation of aromatic amines, α-alkylation of ketones, and β-alkylation of alcohols.

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Section: Resultsmentioning

confidence: 86%

“… 32 In the spectra of the complexes, the distinctive absorption bands due to PPh 3 /AsPh 3 were also observed in the predicted regions. 33 , 34 …”

Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

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Ruthenium Complexes Bearing α-Diimine Ligands and Their Catalytic Applications in N-Alkylation of Amines, α-Alkylation of Ketones, and β-Alkylation of Secondary Alcohols

et al. 2022

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“…However, there has been a growing interest in the last few years in these ligands and their metal complexes due to the broad spectrum of biological properties they possess, such as antifungal, antibacterial, anti-inflammatory, antiviral, anticonvulsant, antidepressant, anticancer along with good anti-HIV activity and structural similarities with natural biological substances [8][9][10][11][12]. The biological activity is mainly due to the presence of the imine (-N=CH-) and the thiazo (-N-C=S) groups near one another [13,14]. Biological properties of thiosemicarbazones have been studied since 1956 when Brockman et al reported the antitumour activities of thiosemicarbazones derived from 2-formylpyridine and recently it has been developed as an antitumour drug and has received clinical phase II on several cancer types [15,16].…”

Section: Introductionmentioning

confidence: 99%

Ni(II), Cu(II) and Pd(II) Complexes of Anisaldehyde-4-phenyl-thiosemicarbazone: Synthesis, Spectral Characterization and Biological Study

Baruah¹,

Borah²,

Kardong³

2016

Asian J. Chem.

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Anisaldehyde-4-phenyl-thiosemicarbazone (HL) complexes of Ni(II), Cu(II) and Pd(II) have been synthesized. Conductivity measurements, spectroscopic (FTIR, UV-visible, ESI(+) mass, 13 C and 1 H NMR, ESR), cyclic voltammetry study and thermal analyses were used to propose their molecular formulations. Ni(II), Cu(II) and Pd(II) complexes show room temperature magnetic moments of 3.07, 1.59 and 0.00 BM, respectively. The ligand and the metal complexes have been screened in vitro for antibacterial activity against the bacterial strains viz. P. vulgaris, S. aureus, E. coli, S. aeruginosa, B. subtillis and S. epidemidis and for antifungal activity against the fungal strains viz. A. niger, F. Oxosporum ciceri, F. oxosporum NCIM1281 and R. solani. The ligand, Cu(II) and Pd(II) complexes have been tested for antitubercular activity against Mycobacterium tuberculosis H37RV strain and for anticancer activity against three human cancer lines. The Cu(II) complex was found to be most potent against M. tuberculosis H37RV strain and showed its MIC as 10 µM. The ligand and Cu(II) complex exhibited quite good growth inhibitory activity against most of the tested bacterial and fungal strains.

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Synthesis, spectral studies, and catalytic and antibacterial activity of Ru(II) complexes with coordinated amides

2008

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UDC 543.42Twelve Ru(II) complexes with coordinated amides were synthesized and characterized by elemental, IR, 1 H, 13 C, 31 P NMR, mass, and electronic spectral analysis, along with magnetic and conductance measurements. Molecular formulas and octahedral structures have been tentatively proposed. These complexes were used as catalysts for the hydrolysis of rivastigmine and neostigmine. The hydrolyzed products were coupled with 3-methyl benzothiazolinone hydrazone reagent in the presence of sodium metaperiodate and the resulting colored products were determined spectrophotometrically. The yields of hydrolyzed products were found to be 98.47% and 99.75% respectively. All the ligands and Ru(II) complexes were screened for antibacterial activity.Introduction. The interest in ruthenium chemistry stems from its ability to have a wide range of oxidation states (-2 to +8) and various coordination geometries [1]. Due to these characteristics, ruthenium organometallics exhibit versatile electron transfer properties and hence a wide range of reactivities [2]. As a result, a large variety of ruthenium organometallics have been utilized as catalysts in organic synthesis [3]. Hence, there is a continuous search for new ruthenium complexes with diverse types of ligands. Literature survey [4-11] on the existing complexes of the precursor RuHCl(CO)(PPh 3 ) 3 reveals that the amide complexes of this precursor have not been synthesized so far. With this in mind, Ru(II) complexes with coordinated amide of the type RuCl(CO)(PPh 3 ) 2 (L 2 ) (Complex 1 to 12) were synthesized and used as catalysts for hydrolysis of rivastigmine and neostigmine. The yields of hydrolyzed rivastigmine (HRS) and neostigmine (HNS) were determined spectrophotometrically [1].Experimental. Instruments. Melting points of all the ligands and complexes were determined on a Buchi-510 melting point apparatus. The percentages of carbon, hydrogen, and nitrogen were determined using a Perkin-Elmer 240C CHN analyzer. UV-Visible spectra were recorded with a Shimadzu UV-160A, a UV-visible double beam spectrophotometer with matched quartz cells of 1 cm path length. The IR spectra in KBr pellets were recorded on a Perkin Elmer-283 spectrophotometer. The scanning time was 6 min in the range 4000-200 cm

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Ruthenium(II) complexes containing triphenylphosphine/triphenylarsine and bidentate Schiff bases derived from 2-hydroxy-1-naphthaldehyde and primary amines

Cited by 8 publications

References 21 publications

Ruthenium Complexes Bearing α-Diimine Ligands and Their Catalytic Applications in N-Alkylation of Amines, α-Alkylation of Ketones, and β-Alkylation of Secondary Alcohols

Ruthenium Complexes Bearing α-Diimine Ligands and Their Catalytic Applications in N-Alkylation of Amines, α-Alkylation of Ketones, and β-Alkylation of Secondary Alcohols

Ni(II), Cu(II) and Pd(II) Complexes of Anisaldehyde-4-phenyl-thiosemicarbazone: Synthesis, Spectral Characterization and Biological Study

Synthesis, spectral studies, and catalytic and antibacterial activity of Ru(II) complexes with coordinated amides

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