Investigation of the effect of sodium azide on the coordination mode of flexible ONO-donor hydrazone ligand in preparing manganese coordination compounds

Polyhedron ◽  
2020 ◽  
Vol 190 ◽  
pp. 114751
Author(s):  
Rahman Bikas ◽  
Monireh Darvishvand ◽  
Victor Kuncser ◽  
Gabriel Schinteie ◽  
Milosz Siczek ◽  
...  
Keyword(s):  
Sodium Azide ◽  
Coordination Compounds ◽  
Coordination Mode ◽  
Hydrazone Ligand

scholarly journals Steric and Electronic Effect of Cp-Substituents on the Structure of the Ruthenocene Based Pincer Palladium Borohydrides

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2236
Author(s):  
Sergey V. Safronov ◽  
Elena S. Osipova ◽  
Yulia V. Nelyubina ◽  
Oleg A. Filippov ◽  
Irina G. Barakovskaya ◽  
...  
Keyword(s):  
Coordination Compounds ◽  
Coordination Mode ◽  
Electronic Effect ◽  
Palladium Chloride ◽  
Pincer Ligands ◽  
Palladium Atom ◽  
Volume Increase ◽  
X Ray ◽  
Ruthenium Atom ◽  
Direction Opposite

Ruthenocene-based PCPtBu pincer ligands were used to synthesize novel pincer palladium chloride RcF[PCPtBu]PdCl (2a) and two novel palladium tetrahydroborates RcF[PCPtBu]Pd(BH4) (3a) and Rc*[PCPtBu]Pd(BH4) (3b), where RcF[PCPtBu] = κ3-{2,5-(tBu2PCH2)2-C5H2}Ru(CpF) (CpF = C5Me4CF3), and Rc*[PCPtBu] = κ3-{2,5-(tBu2PCH2)2C5H2}Ru(Cp*) (Cp* = C5Me5). These coordination compounds were characterized by X-ray, NMR and FTIR techniques. Analysis of the X-ray data shows that an increase of the steric bulk of non-metalated cyclopentadienyl ring in 3a and 3b relative to non-substituted Rc[PCPtBu]Pd(BH4) analogue (3c; where Rc[PCPtBu] = κ3-{2,5-(tBu2PCH2)2C5H2}Ru(Cp), Cp = C5H5) pushes palladium atom from the middle plane of the metalated Cp ring in the direction opposite to the ruthenium atom. This displacement increases in the order 3c < 3b < 3a following the order of the Cp-ring steric volume increase. The analysis of both X-ray and IR data suggests that BH4 ligand in both palladium tetrahydroborates 3a and 3b has the mixed coordination mode η1,2. The strength of the BH4 bond with palladium atom increases in the order Rc[PCPtBu]Pd(BH4) < Rc*[PCPtBu]Pd(BH4) < RcF[PCPtBu]Pd(BH4) that appears to be affected by both steric and electronic properties of the ruthenocene moiety.

2,2′:6′,2′′-Terpyridine switches from tridentate to monodentate coordination in a gold(iii) terpy complex upon reaction with sodium azide

2019 ◽  
Vol 55 (56) ◽  
pp. 8142-8145 ◽  
Author(s):  
Kun Peng ◽  
Alexandra Friedrich ◽  
Ulrich Schatzschneider
Keyword(s):  
Sodium Azide ◽  
Coordination Mode ◽  
X Ray ◽  
Monodentate Coordination

The X-ray structure of a gold(iii) azido complex with a terpyridine coligand in a very rare monodentate coordination mode is reported.

scholarly journals Synthesis, characterization and cytotoxic activity of tioconazole coordination compounds with nickel(II), palladium(II) and platinum(II)

2019 ◽  
Vol 62 (4) ◽  
Author(s):  
Norah Barba ◽  
Carmela Crisóstomo-Lucas ◽  
Rubí Navarro-Peñaloza ◽  
Naytzé Ortiz-Pastrana ◽  
Francisco Sánchez-Bartéz ◽  
...  
Keyword(s):  
Cytotoxic Activity ◽  
Coordination Compounds ◽  
Coordination Mode ◽  
Planar Geometry ◽  
X Ray Diffraction ◽  
Human Carcinoma ◽  
Bidentate Coordination ◽  
Molar Ratios ◽  
Supramolecular Arrangements

Coordination compounds of nickel(II), palladium(II) and platinum(II) with tioconazole (tcnz) were synthesized and characterized by infrared, UV-Vis-NIR, elemental analysis, molar conductivity, magnetic susceptibility, mass spectrometry, NMR spectroscopy and X- ray diffraction. Tioconazole presented a monodentate coordination mode, through the nitrogen atom of the imidazolic ring. The NiII compounds stabilized an octahedral geometry. In [Ni(tcnz)2(NO3)2].H2O the coordinated nitrate presented a bidentate coordination mode, while for the [Ni(tcnz)2(OAc)2].3H2O compound, the acetate behaves as a bridging ligand. When different molar ratios were used on the reaction synthesis, three or six ligands were coordinate to the nickel(II) atom, [Ni(tcnz)3Br2(H2O)], [Ni(tcnz)6]Cl2 and [Ni(tcnz)6]Br2. The palladium(II) and platinum(II) compounds, [Pd(tcnz)2Cl2], [Pt(tcnz)2Cl2].2H2O and [Pd(tcnz)2(OAc)2], stabilized a trans-square planar geometry. The compounds [Ni(tcnz)6]X2 give place to 3D supramolecular arrangements through hydrogen bonding (X∙∙∙H, X = Cl and Br) and p∙∙∙p stacking interactions, between the six membered rings of neighbouring molecules. The in vitro cytotoxic activity of the synthesized compounds was studied in four different human carcinoma cell lines: HCT-15 (colon), HeLa (cervix-uterine), MCF-7 (breast) and PC-3 (prostate).

On the reliability of volume-based thermodynamics for inorganic-organic salts and coordination compounds with uncharged ligands

2017 ◽  
Author(s):  
Robson de Farias
Keyword(s):  
Coordination Compound ◽  
Coordination Compounds ◽  
Formation Enthalpy ◽  
Lattice Energy ◽  
Chemical Hardness ◽  
Acid Anion ◽  
Organic Salts ◽  
Density Values ◽  
Lattice Energies

In the present work, the reliability of the volume-based thermodynamics (VBT) methods in the calculation of lattice energies is investigated by applying the “traditional” Kapustinskii equation [8], as well as Glasser-Jenkins [3] and Kaya [5] equations to calculate the lattice energies for Na, K and Rb pyruvates [9-11] as well as for the coordination compound [Bi(C<sub>7</sub>H<sub>5</sub>O<sub>3</sub>)<sub>3</sub>C<sub>12</sub>H<sub>8</sub>N<sub>2</sub>] [17] (in which C<sub>12</sub>H<sub>8</sub>N<sub>2</sub> = 1,10 phenathroline and C<sub>7</sub>H<sub>5</sub>O<sub>3</sub><sup>-</sup>= <i>o</i>-hyddroxybenzoic acid anion). As comparison, the lattice energies are also calculated using formation enthalpy values for sodium pyrivate and [Bi(C<sub>7</sub>H<sub>5</sub>O<sub>3</sub>)<sub>3</sub>C<sub>12</sub>H<sub>8</sub>N<sub>2</sub>]. For the pyruvates, is verified that none of the considered approach, Kapustinskii, Glasser, Kaya or density, provides values that agrees in an acceptable % difference, with the lattice energy values calculated from the formation enthalpy values. However, it must be pointed out that Kaya approach, with deals with a chemical hardness approach is the better one for such kind of inorganic-organic salts. Based on data obtained for [Bi(C<sub>7</sub>H<sub>5</sub>O<sub>3</sub>)<sub>3</sub>C<sub>12</sub>H<sub>8</sub>N<sub>2</sub>] is concluded that the only one VBT method that provides reliable lattice energies for compounds with bulky uncharged ligands is that one based on density values (derived by Glasser-Jenkins).

Molecular kinetic aspects of the vapo¬rization processes of volatile coordination compounds with organic ligands

2017 ◽  
Vol 58 (8) ◽  
pp. 1534-1542
Author(s):  
V.V. Lukashov ◽  
◽  
M.S. Makarov ◽  
S.N. Makarova ◽  
I.K. Igumenov ◽  
...  
Keyword(s):  
Coordination Compounds ◽  
Organic Ligands

ASSESSMENT OF TOXICITY OF GERMANIUM COORDINATION COMPOUNDS

2019 ◽  
pp. 16-21
Author(s):  
A. V. Kadomtsevа ◽  
I. V. Zhdanovich ◽  
M. S. Piskunovа ◽  
A. N. Lineva ◽  
A. N. Novikova ◽  
...  
Keyword(s):  
Coordination Compounds ◽  
Organometallic Compounds ◽  
Biologically Active ◽  
Pharmacological Properties ◽  
Toxicological Studies ◽  
Methods Of Synthesis ◽  
Promising Area

The synthesis of biologically active coordination compounds and the design on their basis of effective pharmacological preparations is currently the promising area. This paper presents the results of the toxicological studies on digermanium and its complex derivatives. It should be noted that the positive medical properties of organometallic compounds of germanium are confirmed by numerous studies, therefore, the development of the methods of synthesis, as well as investigations of physicochemical and pharmacological properties of these compounds are at the center of attention.

Coordination Compounds of Some 3d-Transition Metal Ions with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)- thiosemicarbazide

2008 ◽  
Vol 59 (7) ◽  
Author(s):  
Madalina Angelusiu ◽  
Maria Negoiu ◽  
Stefania-Felicia Barbuceanu ◽  
Tudor Rosu
Keyword(s):  
Coordination Compounds ◽  
Magnetic Moments ◽  
Thermo Gravimetric Analysis ◽  
Electronic Spectroscopy ◽  
Transition Metal Ions ◽  
Synthesis And Characterization ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
New Compounds

The paper presents the synthesis and characterization of Cu(II), Co(II), Ni(II), Cd(II), Zn(II) and Hg(II) complexes with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)-thiosemicarbazide. The new compounds were characterized by IR, EPR, electronic spectroscopy, magnetic moments, thermo-gravimetric analysis and elemental analysis.

Tetrazoloquinolines: Synthesis, Reactions, and Applications

2020 ◽  
Vol 24 (4) ◽  
pp. 439-464 ◽  
Author(s):  
Rizk E. Khidre ◽  
Tahah A. Ameen ◽  
Mounir A. I. Salem
Keyword(s):  
Carboxylic Acid ◽  
Chemical Reactions ◽  
Sodium Azide ◽  
Biological Activities ◽  
Quinoline Derivatives ◽  
Pharmacological Activities ◽  
Synthesis Reactions ◽  
Intramolecular Cyclocondensation

This review summarizes the synthesis, reactions, and biological activities of tetrazolo[1,5-a]quinoline derivatives. These derivatives were synthesized by several methods such as i) from the reaction of 2-chloroquinoline with sodium azide ii) from diazotization 2-hydrazinylquinoline derivatives, and iii) from intramolecular cyclocondensation of 2-azidoarylidenes. Also, the chemical reactions and pharmacological activities of some tetrazoloquinolines such as tetrazolo[1,5-a]quinoline-4-carbaldehyde, 5-chlorotetrazolo[ 1,5-a]quinoline, 4-(chloromethyl)tetrazolo[1,5-a]quinoline, tetrazolo[1,5- a]quinoline-4-carboxylic acid, and 5-azidotetrazolo[1,5-a]quinoline were discussed.

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