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Abdel-Shafi, Ayman A.; Khalil, Mostafa M.H.; Abdalla, H. H.; Ramadan, Ramadan M.

doi:10.1023/a:1013407905238

Cited by 23 publications

(10 citation statements)

References 21 publications

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“…The i.r. spectrum of the complex displayed two strong bands at 1967 and 1931 cm -1 with a shoulder at higher frequency due to three CO groups with ruthenium in a trigonal bipyramidal sphere [9].…”

Section: Resultsmentioning

confidence: 99%

“…Reaction of 2,3-bis(2¢-pyridyl)quinoxaline, dpq, with [Ru 3 (CO) 12 ] in the presence of dipyridine gave [Ru(CO) 3 (dpq)] [9]. The i.r.…”

Section: Resultsmentioning

confidence: 99%

“…Also, the importance of these systems is related to the facile electrochemical properties, magnetic coupling interactions, catalytic processes, as well as their applications as photosensitizers [6][7][8][9]. The ligand N-[(2-pyridyl)methyl]-2,2¢-dipyridylamine (pmdpa), Scheme 1, incorporates rigidity in the form of the dipyridine moiety, while flexibility is provided by a pendant pyridyl arm [5].…”

Section: Introductionmentioning

confidence: 99%

“…Our interest in characterization of the reactions of hexacarbonyl derivatives of group 6 and 8 with different nitrogen donor ligands containing pyridyl moieties [9][10][11][12] has prompted us to investigate the reactions with N-[(2-pyridyl)methyl]-2,2¢-dipyridylamine (pmdpa).…”

Section: Introductionmentioning

confidence: 99%

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Spectroscopic and Electrochemical Studies of Some Molybdenum and Ruthenium Complexes of N-[(2-pyridyl)methyl]-2,2′-dipyridylamine

Ramadan

Hamza

Mohamed

et al. 2006

Transition Met Chem

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Interaction of the tripodal ligand N-[(2-pyridyl)methyl]-2,2¢-dipyridylamine (pmdpa) with [Mo(CO) 6 ] under reduced pressure gave two complexes [Mo(CO) 4 (pmdpa)] and [Mo(CO) 2 (pmdpa) 2 ], depending on the mole ratio and reaction time. The i.r. spectra of the two complexes gave patterns in the metal carbonyl region confirming the proposed structures. Reaction of [Ru 3 (CO) 12 ] with pmdpa in benzene gave the mononuclear complex [Ru(CO) 3 (pmdpa)]. The electronic absorption spectra of the complexes exhibited visible transitions due to metalto-ligand charge transfers. Electrochemical investigation of the complexes showed some irreversible and quasireversible redox reactions due tautomeric interconversions through electron transfer.

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Section: Resultsmentioning

confidence: 99%

“…Reaction of 2,3-bis(2¢-pyridyl)quinoxaline, dpq, with [Ru 3 (CO) 12 ] in the presence of dipyridine gave [Ru(CO) 3 (dpq)] [9]. The i.r.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spectroscopic and Electrochemical Studies of Some Molybdenum and Ruthenium Complexes of N-[(2-pyridyl)methyl]-2,2′-dipyridylamine

Ramadan

Hamza

Mohamed

et al. 2006

Transition Met Chem

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“…In a previous study, reaction of Ru 3 (CO) 12 , with 2-(2'-pyridyl)benzimidazole (HPBI) resulted in the formation of Ru(CO) 3 (HPBI) complex. In presence of pyridine or bipyridine, the two derivatives [Ru(CO) 3 12 reacted with 2,3-bis(2´-pyridyl)quinoxaline (dpq) in benzene in presence of either 2,2´-dipyridine (dpy) or pyridine (py) to give the mononuclear complex [Ru(CO) 3 (dpq)] or [Ru(CO) 2 (dpq)(py)] [24]. In this article, we report the synthesis and characterization of some ruthenium and osmium complexes of dpk.…”

Section: Introductionmentioning

confidence: 99%

Reactions of Dipyridylketone With Group 8 Metal Carbonyls in Different Media

Khalil

2008

Al-Azhar Bulletin of Science

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Reaction of di-(2-pyridyl)ketone (dpk) with [M 3 (CO) 12 ], M =Ru or Os in dioxan under reduced pressure gave the tricarbonyl derivative [Ru(CO) 3 (dpk)] (1) and [Os(CO) 3 (dpk)] (2). When these reactions were carried out in benzene/ethanol 1:1 (v:v) under reflux and reduced pressure gave the binuclear ruthenium complex [Ru 2 (CO) 4 (-CO)( 3 -dpkO,Oeth) 2 ] (3), where  3 -dpkO,Oeth is N,O,N-ethoxybis(2-pyridyl)-methanolato and the mononuclear [Os(CO) 3 ( 3 -dpkO,Oeth) (4). All complexes were characterized by elemental analysis, infrared, mass and 1 H NMR spectroscopy. The spectroscopic measurements indicated that in dioxane as solvent the dpk act as bidentate ligand while in benzene/ethanol solution the dpk act as tridentate ligand. The magnetic measurements revealed that the complexes (3) and (4) are paramagnetic with change in the formal oxidation state of the ruthenium and osmium atoms from zero to +1 via oxidative addition of the OH group to ruthenium or osmium with a proton displacement to give a low-spin d 7 electronic configuration The UV-Vis studies of the complexes showed blue shift compared to the ligand confirming complex formation.

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