New 2,2'-bipyridine-chloroacetato complexes of transition metals(II)

Czakis-Sulikowska, D.; Czylkowska, Agnieszka

doi:10.1007/s10973-005-0843-y

Cited by 16 publications

(19 citation statements)

References 3 publications

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“…The release of the isoniazid is an endothermic process and resembles the thermal decomposition of isoniazid complexes reported by previous investigators [21]. The final residue, maybe estimated, as manganese sesquioxide or manganese tetraoxide, has the observed mass 15.98% [22].…”

Section: Thermal Propertiessupporting

confidence: 66%

Syntheses, crystal structures and thermal behavior of three Mn(II) complexes with 4-acyl pyrazolone derivatives

et al. 2007

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Three new manganese complexes, [Mn(PPeAP-INH)(CH 3 OH) 2 ] n (CHCl 3 ) (1) [PPeAP-INH=N-(1-phenyl-have been prepared, aiming at the formation of extended coordination polymer with Mn(II) ions. Formation of the corresponding manganese-ligand complexes has been monitored and characterized by chemical and spectroscopic techniques. X-ray diffraction analyses of available single crystals revealed 1D polymeric patterns of supramolecular system. Among them, the dimers of 2 and 3, bridged by two methanol molecules, are extended by hydrogen bond of O-HÁÁÁN to form the 1D chain. In these three new complexes which are all octahedral coordination environments, the N(5) atom of the pyridine heterocycles plays a very important role in building the bridged polymeric chain.

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Section: Thermal Propertiessupporting

confidence: 66%

Syntheses, crystal structures and thermal behavior of three Mn(II) complexes with 4-acyl pyrazolone derivatives

et al. 2007

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“…In 1 and 2 the symmetric stretching vibration of carboxylate groups exists at lower frequency than in Na(diclac). The separation factor Dt = t as (COO) -t s (COO) in 1 and 2 lies in range 235-293, what confirms presence of terminal monodentate carboxylate groups [38,40,41]. Some bending C-H vibrations of diclac ion (present in sodium salt) are not observed in studied complexes probably because they are covered by neighbouring bands.…”

Section: Resultsmentioning

confidence: 65%

“…2 The molecular conformation of compound 2 with atom numbering plotted with 50% probability of displacement ellipsoids. The hydrogen atoms are omitted for clarity exhibits typical vibrations for chelating molecule with principal stretching modes shifted to the higher frequencies [38] in comparison to the free ligand (Table 6) Cg(1), Cg(2), Cg(3) indicates the centroids of aromatic rings (R) containing N1, N2, N51 atoms, respectively, a is a dihedral angle between planes I and J, b is an angle between Cg(I)-Cg(J) vector and normal to plane I and d p is a perpendicular distance of Cg(I) on ring J plane Symmetry equivalent used to generate rings: #1 -x ? 2, -y ?…”

Section: Resultsmentioning

confidence: 99%

Coordination behaviour of 2,2′-bipyridine towards the dichloroacetates of zinc and cadmium

Kruszyński

2009

Struct Chem

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The coordiantion compounds [Zn(C 10 H 8 N 2 ) (Cl 2 HCCOO)(H 2 O) 3 ] -Á[Zn(C 10 H 8 N 2 )(Cl 2 HCCOO) 3 ] ? and [Cd(C 10 H 8 N 2 ) 2 (Cl 2 CHCOO) 2 ] were synthesised and characterised by elemental and thermal analysis, IR and UV-VIS spectroscopy, and X-ray crystallography. The complexes are air stable and well-soluble in water. The zinc atoms are five and six coordinated and the cadmium atom is six coordinated. The coordination polyhedra of central atoms can be described as trapezoidal pyramid and octahedron in zinc compound and as rectangular bipyramid strongly distorted towards skew trapezoidal bipyramid in cadmium compound. In both compounds all dichloroacetate groups are monodentate. The bond valences considerations show that all 2,2 0 -bipyridine molecules are bonded almost 2 times stronger than carboxylate groups. In the structure of zinc compound exist O-HÁÁÁO hydrogen bonds and in both structures can be found weak C-HÁÁÁO hydrogen bonds. Additionally, both compounds are pile-stacked by pÁÁÁp interactions. The IR spectra show typical vibrations for chelating 2,2 0 -bipyridine molecules and terminal monodentate carboxylate groups. The thermal decomposition studies show zinc compound decomposes in 4 steps and cadmium compound decomposes in 5 steps with formation of oxides as a final products. The ligands decompose gradually, first dichloroacetates and next 2,2 0 -bipyridine.

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“…The value of Δν[νasym(COO)-νsym(COO)] can provide structural insight into the coordination mode of the carboxylate group [32,33]. These values are applied to assign the type of the carboxylate coordination in inorganic complexes [34][35][36][37][38].…”

Section: Resultsmentioning

confidence: 99%

Preparation, characterization and crystal structure of dinuclear zinc(II) carboxylate complex with 1-(pyridin-4-yl)ethanone and 4-methylbenzoate based ligands

et al. 2016

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New 2,2'-bipyridine-chloroacetato complexes of transition metals(II)

Cited by 16 publications

References 3 publications

Syntheses, crystal structures and thermal behavior of three Mn(II) complexes with 4-acyl pyrazolone derivatives

Syntheses, crystal structures and thermal behavior of three Mn(II) complexes with 4-acyl pyrazolone derivatives

Coordination behaviour of 2,2′-bipyridine towards the dichloroacetates of zinc and cadmium

Preparation, characterization and crystal structure of dinuclear zinc(II) carboxylate complex with 1-(pyridin-4-yl)ethanone and 4-methylbenzoate based ligands

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