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Roy, Ramkrishna; Banerjee, Manas; Sinha, Chittaranjan; Mahapatra, Ambikesh

doi:10.1023/a:1007198728989

Cited by 14 publications

(10 citation statements)

References 13 publications

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“…1-Alkyl-2-(arylazo)imidazoles (RaaiR¢) are N,N¢-chelating ligands having an azoimine group, AN@NAC@NA as the chelating unit [18][19][20][21][22][23][24][25]. Two classes of arylazo imidazole complexes of palladium(II) have been used in this study: 1-ethyl-2-(arylazo)imidazole (RaaiEt) and 1- The rate increases with rise in temperature as expected (Table 2).…”

Section: Resultsmentioning

confidence: 89%

Interaction Between Pd(RaaiR′)Cl2 and Adenine: Reaction Dynamics and Mechanism [RaaiR′ = 1-alkyl-2-(arylazo)imidazole]

Saha

Ghosh

Mahapatra

2005

Transition Met Chem

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Nucleophilic substitution of Pd(RaaiR¢)Cl 2 [RaaiR¢=1-alkyl-2-(arylazo)imidazole, p-RAC 6 H 4 AN@NAC 3 H 2 NN-1-R¢; where R= H(a)/Me(b)/Cl(c) and R¢ = Et(1)/Bz(2)] with adenine (A) in MeCN-water (1:1) at 298 K, to form [Pd(A) 2 ]Cl 2 , has been studied spectrophotometrically under pseudo-first-order conditions and the analyses support a nucleophilic association path. The reaction follows the rate law, rate = {a+k [A] 2 0 g[Pd(RaaiR¢)Cl 2 ]: first-order in Pd(RaaiR¢)Cl 2 and second-order in A. The rate increases as follows: Pd(RaaiEt)Cl 2 (1) < Pd(RaaiBz)Cl 2 (2) and Pd(MeaaiR¢)Cl 2 (b) < Pd(HaaiR¢)Cl 2 (a) < Pd(ClaaiR¢)Cl 2 (c). External addition of Cl ) (LiCl) suppresses the rate (rate µ 1/[Cl ) ]). The activation parameters, D z H 0 and D z S 0 of the reactions were calculated from the Eyring plot and support the proposed mechanism.

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Section: Resultsmentioning

confidence: 89%

Interaction Between Pd(RaaiR′)Cl2 and Adenine: Reaction Dynamics and Mechanism [RaaiR′ = 1-alkyl-2-(arylazo)imidazole]

Saha

Ghosh

Mahapatra

2005

Transition Met Chem

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“…Adenine (Aldrich) was used as purchased. Acetonitrile was purified by a known procedure [29,30]. All kinetic and spectroscopic measurements were recorded on an Agilent 8453E UV-Visible Spectrometer.…”

Section: Methodsmentioning

confidence: 99%

Interaction of adenine with dichloro-[1-alkyl-2-(naphthylazo)-imidazole]palladium(II) complexes: kinetic and mechanistic studies

Ghosh

Mandal

Mahapatra

2010

Transition Met Chem

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Interaction of adenine (A) with dichloro-[1-alkyl-2-(a-naphthylazo)imidazole] palladium(II) [Pd-(a-NaiR)Cl 2 ], 1 and dichloro- 4b, 4c) was studied. The products were characterized by physico-chemical and spectroscopic methods. The reaction kinetics were second order overall, being first order in both the Pd(II) complex and adenine. The effect of adding chloride was consistent with rate-limiting dissociation of chloride from the complex. Thermodynamic parameters were determined from temperature variation experiments. The second-order rate constant k 2 corroborates with the experimental D à H°values, while the negative values of D à S°i ndicate that the reaction proceeds through an associative inner sphere mechanism.

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“…The 1 H NMR spectra of the ligands aapm (1) and Pd(aapm)Cl 2 (2) were reported from our group. [13,26] The signals were assigned on the basis of chemical shifts, spinspin interaction and their effect on substitution. In Pd(aapm)Cl 2 the signals in general are downfield shifted compared to free ligand values.…”

Section: Spectral Studiesmentioning

confidence: 99%

“…In Pd(aapm)Cl 2 the signals in general are downfield shifted compared to free ligand values. [26] Pd(aapm-N-C 6 H 4 -Xp)Cl show complex NMR spectra. The N-aryl (A-ring) and azoaryl (B-ring) proton signals appear on the upfield side.…”

Section: Spectral Studiesmentioning

confidence: 99%

Coupling of Arylamines with Coordinated Arylazopyrimidines in Palladium(II) Complexes

Santra

Byabartta

Chattopadhyay

et al. 2002

Eur. J. Inorg. Chem.

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Keywords: Nitrogen heterocycles / Palladium / N ligands / Aminations / X-ray structure / EHMO calculation 2-(Arylazo)pyrimidine (1) reacts with palladium chloride and gives Pd(aapm)Cl 2 (2) which undergoes a palladium(II)-mediated novel carbon−nitrogen bond formation reaction of the aromatic amines to the ortho-C−H function of the pendant aryl ring in the coordinated 2-(arylazo)pyrimidine. The reactant, Pd(papm)Cl 2 (2a) and the product, Pd(papm-N-C 6 H 4 -OCH 3 -p)Cl (5a) have been characterised by X-ray crystal structure. The coupled products exhibit low energy trans-

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Untitled

Cited by 14 publications

References 13 publications

Interaction Between Pd(RaaiR′)Cl2 and Adenine: Reaction Dynamics and Mechanism [RaaiR′ = 1-alkyl-2-(arylazo)imidazole]

Interaction Between Pd(RaaiR′)Cl2 and Adenine: Reaction Dynamics and Mechanism [RaaiR′ = 1-alkyl-2-(arylazo)imidazole]

Interaction of adenine with dichloro-[1-alkyl-2-(naphthylazo)-imidazole]palladium(II) complexes: kinetic and mechanistic studies

Coupling of Arylamines with Coordinated Arylazopyrimidines in Palladium(II) Complexes

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