Unsaturated mixed-metal complexes: syntheses of (.eta.-C5Me5)Ni-M(CO)3(.eta.-C5H5) (M = Mo, W) and x-ray diffraction study of (.eta.-C5Me5)Ni-W(CO)3(.eta.-C5H4Me)

1990 ◽  
Vol 9 (4) ◽  
pp. 1343-1345 ◽  
Author(s):  
Michael J. Chetcuti ◽  
Brian E. Grant ◽  
Phillip E. Fanwick ◽  
Margaret J. Geselbracht ◽  
Angelica M. Stacy
Keyword(s):  
Metal Complexes ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray ◽  
Mixed Metal ◽  
Mixed Metal Complexes

Studies on Bis-hydrazine Complexes of Metal Propionates and Mixed Metal Propionates

1994 ◽  
Vol 49 (7) ◽  
pp. 950-954 ◽  
Author(s):  
B. N. Sivasankar ◽  
S. Govindarajan
Keyword(s):  
Thermal Decomposition ◽  
Weight Loss ◽  
Ir Spectra ◽  
Metal Complexes ◽  
Metal Oxides ◽  
X Ray Diffraction ◽  
X Ray ◽  
Mixed Metal ◽  
Mixed Metal Complexes ◽  
Final Residue

Abstract Metal propionate hydrazinates, M(CH3Ch2COO)2(N2H4)2 where M = Mn, Co, Ni, Zn or Cd, and mixed metal propionate hydrazinates with cobalt, M1/3Co2/3(CH3CH2COO)2(N2H4)2 where M = Mg, Mn, Ni, Zn or Cd, have been prepared and characterized by analytical, magnetic, spectral, thermal and X-ray diffraction studies. The thermal decomposition of the former complexes yields the metal oxides while the latter mixed metal complexes give the corresponding metal cobaltites as the final residue. Formation of metal cobaltites has been confirmed by TG weight loss, IR spectra and X-ray diffraction.

Diphenyl(1-pyridyl)phosphine Sulfide as a Ligand in Mono-and Binuclear Coinage Metal Complexes

1997 ◽  
Vol 52 (3) ◽  
pp. 385-390 ◽  
Author(s):  
M. Elena Olmos ◽  
Annette Schier ◽  
Hubert Schmidbaur
Keyword(s):  
Metal Complexes ◽  
Silver Atom ◽  
Gold Atom ◽  
X Ray Diffraction ◽  
Coinage Metal ◽  
X Ray ◽  
Metal Atoms ◽  
Tetrahedral Environment ◽  
Mixed Metal Complexes ◽  
Phosphine Sulfide

Abstract Diphenyl(1-pyridyl)phosphine sulfide, Ph2pyPS, 1, gives a 1:1 complex (2) with AuCl upon treatment with (C4H8S)AuCl. According to an X -ray diffraction analysis, this compound is isomorphous with the Ph3PS complex. [Ph3PAu]BF4 and 1 give the cationic complex [Ph3PAuSPpyPh2]BF4 (3 ) . With two equivalents of the same reagent the binuclear complex 4 is generated, in which the metal atoms are S- and N-bonded. The reaction of 2 equivalents of 1 with [(tetrahydrothiophene)2Au]ClO4 affords the 2:1 complex 5 with the gold atom exclusively S-bonded. The analogous reaction with AgBF4 gives the 2:1 complex 6, the structure of which has also been determined by X-ray diffraction. The silver atom is engaged in coordinative bonding with both sulfur and both nitrogen atoms in a quasi-tetrahedral environment. Addition of AgClO4 to com pound 5, and of [(MeCN)4Cu]B F4 to 6, gives mixed-metal complexes (7, 8) with head-to-head structures, the silver atoms being exclusively S-bonded.

scholarly journals Heteronukleare Mehrkernkomplexe. Darstellung und Struktur von Komplexen mit den Kationen [MII{(OH)2CoIII(en)2}3]5+, M = Ni, Zn, Mg/Polynuclear Mixed-Metal Complexes. Preparation and Structures of Complexes with the Cations [MII{(OH)2CoIII(en)2}3]5+, M = Ni, Zn, Mg

1989 ◽  
Vol 44 (3) ◽  
pp. 257-260 ◽  
Author(s):  
Susanne Müller ◽  
Ulf Thewalt
Keyword(s):  
Metal Complexes ◽  
Central Metal ◽  
X Ray ◽  
Mixed Metal ◽  
Chelate Ligands ◽  
Mixed Metal Complexes

Abstract Reaction of [(en)2Co(H2O)2](ClO4)3 with the dichlorides of nickel, magnesium , and zinc, leads at an pH of ca. 8 to the heterometallic, isomorphous complexes [MII{(OH)2CoIII(en)2}3](ClO4)4Cl·3H2O. The central metal(2 +) cations of these complexes are surrounded octahedraily by three [(en)2Co(OH)2]+ chelate ligands. This has been confirmed by X-ray structure analyses. The cation antipodes of the racemic salts exhibit the conformations Δ (⋀ ⋀ ⋀) / ⋀ (Δ Δ Δ) .

Trans alkenylpyridine and alkenylamine complexes of platinum

2000 ◽  
Vol 78 (5) ◽  
pp. 568-576 ◽  
Author(s):  
Michael P Shaver ◽  
Christopher M Vogels ◽  
Andrew I Wallbank ◽  
Tracy L Hennigar ◽  
Kumar Biradha ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Diffraction Study ◽  
Rhodium Catalyst ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Metal Catalyzed

Addition of cis-cyclooctene (coe) to K2PtCl4 gives trans-[PtCl2(coe)]2 (1), which reacts with excess coe to give trans-PtCl2(coe)2 (2). Compound 2 was characterized by an X-ray diffraction study and crystals were found to be triclinic, a = 5.7838(5), b = 7.4347(6), c = 9.9972(9) Å, α = 83.924(1), β = 87.844(2), γ = 73.546(1)°, Z = 1, with space group P1-. Addition of 4-vinylpyridine (4vp) to 1 gave trans-PtCl2(4vp)2 (5) which was also characterized by an X-ray diffraction study. Crystals of 5 were monoclinic, a = 8.2255(6), b = 12.8254(10), c = 6.9624(5) Å, β = 98.8230(10)°, Z = 2, with space group P21/c. Although alkenylamines react with 1 to give a mixture of products, addition of one equivalent of apve (H2NCH2CH2CH2OCHβCH2) to 1 cleanly afforded the organometallic product trans-PtCl2(coe)(thmo) (thmo = tetrahydro-2-methyl-1,3-oxazine) arising from a metal-catalyzed intramolecular hydroamination of the starting alkenylamine. Initial investigations into the functionalization of metal complexes containing pendant alkene groups have shown that catecholborane can be added in some cases, using a rhodium catalyst, to give the corresponding organoboronate ester platinum compounds.Key words: alkenylamines, alkenylpyridines, hydroamination, hydroboration, platinum.

X-ray diffraction study of bisphosphonate metal complexes: Mg and Ca complexes of (dichloromethylene)bisphosphonic acid P,P′-diisopropyl ester

Polyhedron ◽  
2005 ◽  
Vol 24 (2) ◽  
pp. 305-309 ◽  
Author(s):  
Mervi Kontturi ◽  
Sirpa Peräniemi ◽  
Jouko J. Vepsäläinen ◽  
Markku Ahlgrén
Keyword(s):  
Metal Complexes ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bisphosphonic Acid

scholarly journals Mono- and Mixed Metal Complexes of Eu3+, Gd3+, and Tb3+ with a Diketone, Bearing Pyrazole Moiety and CHF2-Group: Structure, Color Tuning, and Kinetics of Energy Transfer between Lanthanide Ions

Molecules ◽  
2021 ◽  
Vol 26 (9) ◽  
pp. 2655
Author(s):  
Victoria E. Gontcharenko ◽  
Mikhail A. Kiskin ◽  
Vladimir D. Dolzhenko ◽  
Vladislav M. Korshunov ◽  
Ilya V. Taydakov ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Metal Complexes ◽  
Group Structure ◽  
Excitation Energy Transfer ◽  
Lanthanide Ions ◽  
X Ray Diffraction ◽  
Transfer Rates ◽  
Mixed Metal ◽  
Mixed Metal Complexes ◽  
Kinetics Of

Three novel lanthanide complexes with the ligand 4,4-difluoro-1-(1,5-dimethyl-1H-pyrazol-4-yl)butane-1,3-dione (HL), namely [LnL3(H2O)2], Ln = Eu, Gd and Tb, were synthesized, and, according to single-crystal X-ray diffraction, are isostructural. The photoluminescent properties of these compounds, as well as of three series of mixed metal complexes [EuxTb1-xL3(H2O)2] (EuxTb1-xL3), [EuxGd1-xL3(H2O)2] (EuxGd1-xL3), and [GdxTb1-xL3(H2O)2] (GdxTb1-xL3), were studied. The EuxTb1-xL3 complexes exhibit the simultaneous emission of both Eu3+ and Tb3+ ions, and the luminescence color rapidly changes from green to red upon introducing even a small fraction of Eu3+. A detailed analysis of the luminescence decay made it possible to determine the observed radiative lifetimes of Tb3+ and Eu3+ and estimate the rate of excitation energy transfer between these ions. For this task, a simple approximation function was proposed. The values of the energy transfer rates determined independently from the luminescence decays of terbium(III) and europium(III) ions show a good correlation.

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