نتایج جستجو برای: 44 bipyridine

تعداد نتایج: 98203  

Journal: :Dalton transactions 2013
Piersandro Pallavicini Giacomo Dacarro Pietro Grisoli Carlo Mangano Maddalena Patrini Federica Rigoni Luigi Sangaletti Angelo Taglietti

A propyltrimethoxysilane-modified 2,2'-bipyridine ligand is synthesized and its acetonitrile solutions are used to prepare monolayers of the molecule on glass surfaces. Absorption and X-ray photoelectron spectroscopy demonstrate that the modified glass surfaces bind Cu(2+) with a 1:1 ratio with respect to the 2,2'-bipyridine moieties under the chosen preparative conditions, producing materials ...

2009
Bing-Yu Zhang Jing-Jing Nie Duan-Jun Xu

In the title complex, [Zn(C(7)H(5)O(3))(2)(C(10)H(8)N(2))(H(2)O)], the Zn(II) ion is coordinated by two 4-hydroxy-benzoate anions, one 2,2'-bipyridine mol-ecule and one water mol-ecule and displays a distorted octa-hedral geometry. One Zn-O bond [2.5300 (15) Å] is much longer than the others in the mol-ecule. In the crystal structure, the face-to-face separation of 3.547 (9) Å suggests no π-π s...

2011
Ezzatollah Najafi Mostafa M. Amini Seik Weng Ng

The title dimethyl-tin diisothio-cyanate adduct of 4,4'-bipyridine, [Sn(CH(3))(2)(NCS)(2)(C(10)H(8)N(2))](n), adopts a chain motif in which the N-heterocycle functions as a bridge to adjacent all-trans octa-hedrally coordinated tin atoms. The Sn(IV) atom lies on a special position of 2/m site symmetry, the methyl C atom on a special position of 2 site symmetry, and the thio-cyanate and 4,4'-bip...

Journal: :Dalton transactions 2011
Andrew J Hallett Jennifer E Jones

A novel Ru(II) sensitiser A597 containing the 4,4'-dioctylamido-2,2'-bipyridine ancillary ligand is synthesised without the need for purification steps. It shows an irreversible oxidation at 0.92 V in the cyclic voltammogram and an absorbtion at 539 nm in the UV-vis spectrum corresponding to an (1)MLCT transition. Preliminary DFT calculations reveal that the HOMO is localised on the ruthenium m...

2012
Wolfgang Kaim

The single electron transfer (SET) reactivity of metal alkyls and hydrides is currently receiving growing attention [1-3]. Thus, it has been demonstrated that aluminum species AIX3 (X = R [4], H [5], Cl [6]) can react with reducible carbonyl compounds to form aluminium containing radical complexes [4-6]. Besides carbonyl compounds, certain N-heterocycles can also be used as electron transfer su...

2009
Qiu-Xia Zhang Gan-Qing Zhao Jian-Qi Zhu Ling-Wei Xue Yong-Jun Han

In the title compound, [Cu(C(15)H(11)N(3)O(3))(C(10)H(8)N(2))], the Cu(II) atom is five-coordinated in a distorted square-pyramidal CuN(3)O(2) geometry. The basal positions are occupied by three donor atoms from the tridentate Schiff base ligand and by one N atom from the 2,2'-bipyridine ligand. The axial position is occupied by the other N atom of the 2,2'-bipyridine ligand. The crystal struct...

2008
Ben-Yong Lou Mao-Chun Hong

In the title dinuclear complex, [Cu(2)(C(5)H(10)NO(2))(2)(C(10)H(8)N(2))(3)(H(2)O)(2)](NO(3))(2)·2H(2)O, each of the two l-valinate anions chelates a Cu(II) center through the amino N and carboxyl-ate O atom, forming a five-membered ring. A 4,4'-bipyridine mol-ecule bridges two water-coordinated Cu atoms, each of which is connected to another 4,4'-bipyridine, giving rise to a square-pyramidal c...

Journal: :Chemical science 2012
Elizabeth R Young Joel Rosenthal Daniel G Nocera

Amidine-appended ferrocene derivatives form a supramolecular assembly with Ru(ii)(bpy-COOH) (L)22+ complexes (bpy-COOH is 4-CO2H-4'-CH3-bpy and L = bpy, 2,2'-bipyridine or btfmbpy, 4,4'-bis (trifluoromethyl)-2,2'-bipyridine). Steady-state, time-resolved spectroscopy and kinetic isotope effects establish that the metal-to-ligand charge transfer excited states of the Ru(ii) complexes are quenched...

2009
Rufu Yao Dong E. Wang

In the title complex, {[Co(NCS)(2)(C(10)H(8)N(2))(H(2)O)(2)]·C(10)H(8)N(2)}(n), the Co(II) ion is located on an inversion centre and is coordinated by two N atoms from the two 4,4'-bipyridine ligands, two O atoms from the water mol-ecule, and two N atoms from two isothio-cyanate ions in a distorted octa-hedral environment. In the crystal, the coordinated water mol-ecules, isothio-cyanate ions a...

2012
Haixia Wang Shaohong Wang Yuehe Lang

In title complex, [Mn(C(2)N(3))(2)(C(10)H(8)N(2))(2)], the Mn(II) ion is coordinated in a slightly distorted octa-hedral geometry by six N atoms. Four of the N atoms are from two chelating bipyridine ligands and two are from a pair of cis-coordinated dicyanamide ligands. The dihedral angle formed by the mean planes of the bipyridine rings is 85.93 (14)°. The central N atom of one of the dicyana...

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