Synthesis and x-ray structure of the binuclear complex [(MeC(CH2PEt2)3)Fe(.mu.-Cl)3Fe(MeC(CH2PEt2)3)]BPh4.cntdot.CH2Cl2. Interpretation of the geometrical and electronic features through a recent MO approach for M2L9 complexes

1982 ◽  
Vol 21 (2) ◽  
pp. 612-615 ◽  
Author(s):  
C. Bianchini ◽  
P. Dapporto ◽  
C. Mealli ◽  
A. Meli
Keyword(s):  
Binuclear Complex ◽  
X Ray

Synthesis of an Unprecedented H-stitched Binuclear Crystal Structure Based on Selective Fluorescence Recognition of Zn2+ in Newly Synthesized Schiff Base Ligand with DFT and Imaging Application in Living Cells

2021 ◽  
Author(s):  
SOUMYA SUNDAR MATI ◽  
Dr. SAUGATA KONAR ◽  
BOBY SAMAI
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Elemental Analysis ◽  
Schiff Base Ligand ◽  
Binuclear Complex ◽  
Living Cells ◽  
X Ray Diffraction ◽  
Schiff Base Ligands ◽  
X Ray ◽  
Imaging Application

A zinc coordinated rare binuclear complex was synthesised and characterized by elemental analysis and single-crystal X-ray diffraction. Two mononuclear units formed by two Schiff base ligands 2-((2-(pyrimidin-2-yl)hydrazono)methyl)phenol (PHP) coordinated with...

Novel binuclear doubly vinyl-bridged iridium complexes formed by olefinic C—H activation

1995 ◽  
Vol 73 (7) ◽  
pp. 1050-1057 ◽  
Author(s):  
Helmut Werner ◽  
Justin Wolf ◽  
Angelika Nessel ◽  
Arno Fries ◽  
Bernd Stempfle ◽  
...  
Keyword(s):  
Structure Analysis ◽  
Binuclear Complex ◽  
Iridium Complexes ◽  
Heterometallic Complex ◽  
Metal Compounds ◽  
X Ray ◽  
Compound C

Treatment of [C5H5IrX2]n (2: X = Cl; 3: X = Br) with CH2=CHtBu in the presence of Na2CO3–iPrOH gives, besides the bis(olefin) complex [C5H5Ir(CH2=CHtBu)2] (4), the doubly vinyl-bridged iridium(II) compound {[C5H5Ir(μ-η1,η2-CH=CHtBu)]2} (5). The related binuclear complex {[CH2(C5H4)2][Ir2(μ-η1,η2-CH=CHtBu)2]} (9) was obtained from {[CH2(C5H4)2][IrBr2]2}n (8) and CH2=CHtBu–Na2CO3 in ethanol and characterized by an X-ray structure analysis (monoclinic, C2/c (No. 15), a = 20.050(8), b = 8.843(1), c = 24.25(1) Å, β = 99.53(2)°, V = 4241 Å3, Z = 8, R = 0.032, Rw = 0.041). Protonation of both 5 and 9 with HBF4•OEt2 yields the BF4 salts of the unsymmetrical hydridometal cations 10 and 11 in which the vinyl bridges are still intact. The reaction of the binuclear bis(cyclooctene)metal compounds {[CH2(C5H4)2][Rh(C8H14)2]2} (14) and {[CH2(C5H4)2][Rh(C8H14)2][Ir(C8H14)2]} (17) with bromine yields almost quantitatively the polymeric (or oligomeric) dibromo derivatives 16 and 18, which could, however, not be converted to vinyl bridged complexes by treatment with CH2=CHtBu–Na2CO3–ROH. Keywords: iridium complexes, C-H activation, bridging vinyl ligands, cationic hydridometal complexes, heterometallic complex.

Übergangsmetall-Carbin-Komplexe, LXXII [1]. Reaktionen von trans-Bromotetracarbonyl(phenylcarbin)chrom mit Lithiumthiokresolat und Lithiumselenophenolat / Transition Metal Carbyne Complexes, LXXII [1]. Reactions of trans-Bromotetracarbonyl(phenylcarbyne)chromium with Lithium Thiocresolate and Lithium Phenylselenolate

1982 ◽  
Vol 37 (10) ◽  
pp. 1274-1278 ◽  
Author(s):  
Werner Roll ◽  
Ernst Otto Fischer ◽  
Dietmar Neugebauer ◽  
Ulrich Schubert
Keyword(s):  
Hydrochloric Acid ◽  
Transition Metal ◽  
Structure Determination ◽  
Binuclear Complex ◽  
Spectroscopic Data ◽  
Reaction Conditions ◽  
X Ray ◽  
Carbyne Complexes ◽  
Ether Complex

The reaction of trans-bromotetracarbonyl(phenylcarbyne)chromium (1) with lithium phenylselenolate and subsequent protonation with aqueous hydrochloric acid leads to (CO)5Cr[Se2(C6H5)2] (3) and (CO)4Cr(μ-SeC6H5)2Cr(CO)4 (4). From 1 and lithium 4-methylphenylthiolate (CO)5CrC(C6H5)SC6H4CH3 (5) and (CO)5CrS(C2H5)(4-CH3C6H4) (6) are obtained, if triethyloxonium tetrafluoroborate is used instead of hydrochloric acid. The analoguous reaction of 1 with lithium phenylselenolate yields the seleno ether complex (7). Reaction conditions, properties, spectroscopic data and the results of an X-ray structure determination of the binuclear complex (4) are reported.

Preparation and Structure of Bis-μ-(Benzene-1,2-Dithiolato)-bis[(benzene-1,2-dithiolato)-technetium( IV)]-Chloroform (1:1)

1988 ◽  
Vol 41 (2) ◽  
pp. 269 ◽  
Author(s):  
SF Colmanet ◽  
MF Mackay
Keyword(s):  
Crystal Structure ◽  
Bond Length ◽  
Title Compound ◽  
Binuclear Complex ◽  
Aqueous Alcohol ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Sulfur Ligand ◽  
Trigonal Prismatic

After reaction of benzene-1,2-dithiol (bdtH2) with ammonium [99Tc] pertechnetate in aqueous alcohol, extraction of the reaction mixture with chloroform yielded wine-red crystals of the title compound, C24H16S8Tc2.CHCl3. The crystal structure of the binuclear complex has been determined by X-ray diffraction. Crystals are triclinic and belong to the space group Pī with a 8.534(1), b 8.842(2), c 11.192(3)Ǻ, α 107.02(2), β 98.13(1), γ 100.60(2)° with Z 1. Refinement on 1524 data measured with Cu Kα radiation converged at R 0.082. The complex has exact Ci point symmetry and pseudo-C2 symmetry. Each technetium atom is coordinated to a trigonal -prismatic array of six sulfur ligand atoms. These arrays are fused through a quadrilateral face defined by the four bridging sulfur atoms of two benzene-1,2- dithiolato ligands to give a Tc2S8 core of D2h pseudo-symmetry. As a Tc - Tc bond [bond length 2.591(3)Ǻ] passes through the mid point of the quadrilateral face, this novel geometry can be described in terms of capped trigonal prisms. The chloroform is disordered.

scholarly journals Platinum (II) and palladium (II) complexes: synthesis, antimicrobial and antifungal activity

2022 ◽  
Vol 11 (4) ◽  
pp. 651-662
Author(s):  
O. V. Salishcheva ◽  
A. Yu. Prosekov ◽  
N. E. Moldagulova ◽  
V. M. Pugachev
Keyword(s):  
Escherichia Coli ◽  
Pseudomonas Aeruginosa ◽  
Bacillus Subtilis ◽  
Binuclear Complex ◽  
Palladium Complex ◽  
Platinum Complex ◽  
Binuclear Complexes ◽  
X Ray ◽  
Aspergillus Brasiliensis ◽  
Bacteria And Fungi

The study aims to synthesize and examine the biological activity of mono- and binuclear platinum (II) and palladium (II) complexes containing terminal and bridging nitrite ligands against the test cultures of Bacillus subtilis B4647, Aspergillus brasiliensis (niger) F679, Pseudomonas aeruginosa B8243, and Escherichia coli. Through the interaction of mononuclear platinum (II) and palladium (II) complexes, dimeric complexes having nitrite ligands were synthesized. The composition and structure of these complexes were established using elemental analysis, conductometry, potentiometry, cryoscopy, infrared spectroscopy, X-ray diffraction analysis, and X-ray fluorescence analysis. A way to coordinate nitrite ligands with the central atom was established. Antimicrobial and antifungal properties were evaluated according to the capability of the synthesized complexes to inhibit the activity of bacteria and fungi via diffusion in agar and in vitro dilution. The minimum inhibitory and bactericidal concentrations of the complexes suppressing the visible growth of microorganisms and fungi, as well as exhibiting their bactericidal effect, ranged from 62.5–125 μmol/dm3. The obtained results revealed a high activity of the palladium (II) binuclear complex of the non-electrolytic type and the platinum (II) binuclear complex of the cationic type. Unlike mononuclear complexes, palladium and platinum binuclear complexes demonstrate higher antibacterial activity. Antibacterial effectiveness exhibited by the palladium complex of the non-electrolytic type against bacteria Bacillus subtilis and Escherichia coli, as well as fungi Aspergillus niger, is more pronounced. The only exception is the antimicrobial activity of the palladium complex against Pseudomonas aeruginosa, which is comparable to that of the binuclear platinum complex of the cationic type. By changing the structure of the complex, the composition and charge of the inner sphere, the number of coordination centers, as well as the nature and denticity of ligands, it is possible to achieve a higher toxic effect of the complexes against bacteria and fungi.

Intramolecular Hydrolysis of Coordinated Acetonitrile in a Binuclear Complex of Cobalt(III): X-Ray Crystallographic Analysis of Salts of [(tren)Co(μ-NH2,μ-L)Co(tren)]4+(L=OH, CH3C(O)NH)

1990 ◽  
Vol 43 (4) ◽  
pp. 643 ◽  
Author(s):  
NW Alcock ◽  
II Creaser ◽  
NJ Curtis ◽  
L Roecker ◽  
AM Sargeson ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Binuclear Complex ◽  
Binding Mode ◽  
Crystallographic Analysis ◽  
Bridging Ligands ◽  
X Ray ◽  
Hydrolysis Of

A synthesis of [( tren )Co(μ-NH2,μ-OH)Co( tren )]4+(3)( tren = tris (2- aminoethyl )amine) is reported along with a series of derivatives: [( tren ) XCo (μ-NH2) CoX ( tren )]n+, where X = CF3SO3- (n = 3)(4), X = CH3CN (n = 5)(5), and [( tren )Co(μ-NH2,μ-CH3C(O)NH)Co( tren )]4+ (6). The substitution of (4) by CH3CN to yield (5) was studied in CH3CN at 20°C, k = 9.0×10-3 s-1, and the intramolecular hydrolysis of (5) to yield the bridging acetamide complex (6) was studied at various acid concentrations. The X-ray crystal structures were determined for (3b) (exafluorophosphate, dihydrate) and (6b) (dithionate, tetrahydrate ). Both crystals are monoclinic, respectively P21/n with a 11.082(2), b 10.402(2), c 15.611(2)Ǻ, β 99.13(2)°, Z 2, and C2/c with a 14.328(2), b 14.046(1), c 16.497(2)Ǻ, β 101.90(1)°, Z 4. For the salt of (3), 2389 data with 1 ≥ 2σ(I) were refined to R 0.070 ( Rw 0.066), and, for the salt of (6), 3087 data with I ≥ 3σ(I) were refined to R 0.041 ( Rw 0.056). Both ions lie on pseudo-symmetric sites involving disorder of the bridging ligands . The structures establish the binding mode of the acetamido ion and the orientation of the tren groups in the isolated complexes.

Synthesis, Crystal Structure and Bioactivity of Copper Complex with bi-[N-(propionic acid)] terephthalal diacythydrazon

2019 ◽  
Vol 41 (3) ◽  
pp. 544-544
Author(s):  
Fengying Chen Fengying Chen ◽  
Wangting Wu Wangting Wu ◽  
Shuiyang He Shuiyang He
Keyword(s):  
Crystal Structure ◽  
Propionic Acid ◽  
Coordination Polyhedron ◽  
Copper Complex ◽  
Binuclear Complex ◽  
Antibacterial Activities ◽  
X Ray Diffraction ◽  
X Ray

A new Cu(II) complex with bi-[N-(propionic acid)] terephthalal diacythydrazon (H4L) was obtained by the reaction of CuCl2•2H2O and H4L in 1:1 pyridine and methanol. According to X-ray diffraction, the product was a binuclear complex, [Cu2L(pyridine)6]•2H2O. Each Cu(II) in the complex is six-coordinated by one N and two O atoms of H4L and three N atoms from pyridine. The coordination polyhedron around Cu(II) can be described as an octahedron with slightly distorted. Inaddition, antibacterial activities of the complex against coliform were investigated. The results showed that the inhibit rates of binuclear complex were 83% against coliform.

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