- Synthesis and IR spectroscopic study of molecular complexes of molybdenum oxotetrachloride with azomethines
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Molecular complexes of MoOCl4 with benzal- and salicylalanilines were synthesized, and their IR spectra were investigated. The complexes have octahedral structure. Salicylalaniline and its derivatives were suggested to be coordinated by the cen
- Abramenko
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- Crystal and Molecular Structure of Molybdenum Tetrachloride Oxide by Neutron and X-Ray Diffraction
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The crystal and molecular structure of MoOCl4 has been determined by neutron and X-ray diffraction at 293 K and 77 K.A model, derived from consideration of the cubic close-packing together with an X-ray Patterson synthesis with Weissenberg data, was refined by the neutron powder profile-fitting technique to R = Σ0 - yc>/Σy0 = 0.094 (293 K) and 0.081 (77 K).The compound MoOCl4 is triclinic, space group PI, with unit-cell dimensions a = 6.255(4), b = 7.236(3), c = 7.134(3) Angstroem, α = 103.49(3), β = 107.02(6), and γ = 92.82(4) deg at 293 K.There are no large changes in the structure on cooling to 77 K.The Mo atoms occur in adjacent octahedral holes (Mo-Mo = 4.12 Angstroem) but there is no dimer formation as in MoCl5.The configuration around Mo is a square pyramid, with four basal chlorine atoms and an apical oxygen atom . The Mo atom is =0.41 Angstroem above the basal plane.There is longer MoCl interaction of 2.9 Angstroem in the octahedral position through the basal plane; if this were stronger (ca.Angstroem), then the structure would consist of dimers.The structure is in agreement with a gas electron-diffraction study, which found a C4v square pyramid with Mo-O = 1.658(5) and Mo-Cl = 2.279(3) Angstroem.It is also in agreement with the structures of WOCl4, ReOCl4, WSCl4, and WSBr4 where similar square pyramids are observed, but associated with different crystal symmetries.
- Taylor, John C.,Waugh, A. Bruce
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- Reactions of MoOCl4 and MoO2Cl2 with heterocyclic thioamides
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MoOCl4/MoO2Cl2 were reacted with 2-mercaptopyridine (IUPAC: pyridine-2-thiol)/4phenylimidazole-2-thiol (IUPAC: 4-phenyl-1,3-dihydroimidazole-2-thione)/6-mercaptopurine (IUPAC: 1,7-dihydro-purine-6-thione) in acetonitrile m
- Rani, Deepika,Singh, Gursharan,Sharma, Seema
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p. 459 - 466
(2021/05/19)
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- The MoOCl4-TeCl4 System
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Interaction in the MoOCl4-TeCl4 system is studied by differential thermal analysis. Formation of a new phase of the composition 1 : 1 is found. The region of the solid solution on the basis of tellurium tetrachlo-ride at 1440C extends to 25 mol % molybdenum oxotetrachloride.
- Safonov,Korshunov
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p. 1427 - 1428
(2008/10/08)
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- Spectroscopic Studies on Matrix-isolated Molybdenum Pentachloride
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Matrix-isolation studies have been carried out on molybdenum petnachloride.In a nitrogen-matrix, prominent i.r. bands are observed at ca. 473 and 408 cm-1, which on the basis of isotope studies are assigned as the A1 (axial and E Mo-Cl stretching modes of monomeric MoCl5 (C4v).Argon matrices yielded essentially the same spectroscopic features.Corresponding u.v.-visible spectra were obtained and assigned on the basis of a square-pyramidal geometry.Attempts to prepare and characterise MoCl6 were unsuccessful.
- Brisdon, Alan K.,Graham, John T.,Hope, Eric G.,Jenkins, Delyth M.,Levason, William,Ogden, J. Steven
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p. 1529 - 1532
(2007/10/02)
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- ANALYSIS OF VARIOUS METAL OXIDE/ORGANOHALIDE-BASED FLAME RETARDANTS.
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The mechanism of evaporation of various metal oxides and the formation and evaporation of metal halides in the presence of chlorine-containing compounds have been studied by complex thermal analysis including atomic absorption measurement of the evolved s
- Simon,Szitanyi,Kantor
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p. 1915 - 1922
(2008/10/08)
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- The Reactivity of Molybdenum and Tugsten Trioxide Vapours towards Organic and Inorganic Compounds at -196 deg C
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Vapours of molybdenum and tungsten trioxides, prepared by heating the solid oxides under vacuum, have been reacted with organic compounds and some inorganic halides at -196 deg C.Complexes of the trioxides are formed with pentane-2,4-dione, acetone, formic acid, and methanol, but the oxides fail to bring about metathesis or isomerisation of olefins.Oxygen-halogen exchange reactions occur between the trioxides and BCl3, SiCl4, and HCl; PCl3 is oxidised.The reactivity of the condensed vapours of both oxides at -196 deg C is markedly higher than the reactivity of the normal solid oxides at room temperature.
- Cook, Neil D.,Timms, Peter L.
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p. 239 - 244
(2007/10/02)
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