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Book ChapterDOI

The Organometallic and Metal-Organic Chemistry of Molybdenum

01 Jan 1994-Studies in Inorganic Chemistry (Elsevier)-Vol. 19, Iss: 42, pp 277-402
About: This article is published in Studies in Inorganic Chemistry.The article was published on 1994-01-01. It has received 3 citations till now. The article focuses on the topics: Molybdenum.
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Reference EntryDOI
21 May 2020
TL;DR: In this article, the authors present a survey of the Molybdenum chemistry and its application in various areas of industry, such as mining, automotive, agriculture, and economic aspects.
Abstract: The article contains sections titled: 1. Introduction 2. Properties 3. Occurrence 3.1. Minerals 3.2. Deposits 4. Production 4.1. Concentration 4.2. Processing of Concentrate 4.3. Recovery from Spent Petroleum Catalysts 4.4. Recovery during Production of Tungsten Ores 4.5. Production of Molybdenum Metal Powder 4.6. Production of Compact Molybdenum Metal 4.7. Processing of Molybdenum 4.8. Molybdenum-Base Alloys 5. Uses 6. Production of Ferromolybdenum 6.1. Ferromolybdenum Grades 6.2. Raw Materials 6.3. Submerged Arc Furnace Carbothermic Reduction 6.4. Metallothermic Reduction 7. Molybdenum Compounds 7.1. Overview of Molybdenum Chemistry 7.2. Molybdenum Oxides 7.3. Molybdenum Chalcogenides 7.4. Molybdenum Halides 7.5. Molybdates, Isopolymolybdates, and Heteropolymolybdates 7.6. Other Molybdenum Compounds 8. Uses of Molybdenum Compounds 8.1. Catalysis 8.2. Lubrication 8.3. Corrosion Inhibition 8.4. Flame Retardancy and Smoke Suppression 8.5. Pigments 8.6. Agriculture 9. Analysis 10. Economic Aspects 11. Environmental Aspects 12. Toxicology and Occupational Health

35 citations

Journal ArticleDOI
TL;DR: The heteroleptic molybdenum complexes have been analyzed quantitatively by means of linear solvation energy relationships based on Kamlet-Taft solvatochromism parameters, as well as on Drago's "unified scale of solvent polarity".
Abstract: The heteroleptic molybdenum complexes [{Mo(NO)Tp*X}n(L-L)] [Tp* = HB(3,5-Me2C3HN2)3; X = Cl, I; L-L = 4-NC5H4(CHCH)4C5H4N-4‘, n = 1, 2; X = Cl; L-L = {4,4‘-NC5H4CHCHC(Me)CHCH=}2, n = 2] have a low energy absorbance in their electronic spectra which exhibits solvatochromic shifts. These have been analyzed quantitatively by means of linear solvation energy relationships based on Kamlet−Taft solvatochromism parameters, as well as on Drago's “unified scale of solvent polarity”. Each of these approaches leads to satisfactory linear models, in qualitative agreement with one another. The solvatochromism is due to a combination of increased solvent dipolarity/polarizability and solvent-to-solute hydrogen bonding, each preferentially stabilizing polar ground states compared with less polar excited states. The latter originate from metal-to-ligand charge transfer. Quantitatively, the Drago and Kamlet−Taft models differ somewhat. The former are statistically slightly better than those based on Kamlet−Taft parameters.

15 citations

Journal Article
TL;DR: In this paper, the reaction between [WBr 3 (CO) 2 (η 5 -C 5 H 5 )] and excess of Tl(SC 6 F 5 ) affords Tl[WBr 2 (CO), η 5 −C 5H 5 )] (2b) as the major product and [W(SC6F 5 ) 3 ( CO), Δ − 5 − C 5 H5 )] (3) as minor product.
Abstract: The reaction between [WBr 3 (CO) 2 (η 5 -C 5 H 5 )] and excess of Tl(SC 6 F 5 ) affords Tl[W(SC 6 F 5 ) 4 (η 5 -C 5 H 5 )] (2b) as the major product and [W(SC 6 F 5 ) 3 (CO)(η 5 -C 5 H 5 )] (3) as the minor product. Complex (3) has been structurally characterised as its 0.5 CH 2 Cl 2 solvate by X-ray diffraction
References
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Journal ArticleDOI
TL;DR: In this article, isotopic labelling reveals that the co-ordinated oxygen does not evolve from NO, whose oxgen appears in CO2, whose co-coordinated oxygen is not evolved from NO.
Abstract: Heatin [M(CO)2(NO)(η-C5H5)] and [M2(CO)6(η-C5H5)2](M = Mo or W) together at 200 °C yields metal cluster nitrides [M3(N)(O)(CO)4(η-C5H5)3](M3= Mo3, MoW2, and W3); isotopic labelling reveals that the co-ordinated oxygen does not evolve from NO, whose oxgen appears in CO2.

7 citations

Journal ArticleDOI
TL;DR: In this article, a linear correlation was found between the reduction potentials within each of the two series and the Hammett meta substituent parameters, σm, for Z.

7 citations

Journal ArticleDOI
TL;DR: In this article, the problem of the arene orientation in molybdenum(0) complexes with I2 has been investigated under a variety of reaction conditions and stoicheiometry of the reagents, and shown to be more complicated than previously suggested.
Abstract: The reactions of molybdenum(0) complexes with I2 have been investigated under a variety of reaction conditions and stoicheiometry of the reagents, and shown to be more complicated than previously suggested. Although the [Mol (CO)3(η6-arene)]+ cation is always formed, the counter anion can vary depending on the reaction time and on the molar ratio of the reagents. Some of the isolated compounds were studied by X-ray diffractometric methods: [Mol (CO)3(η6-C6H3Me3-1,3,5)][Mo2I5(CO)6], (3)[monoclinic, space group P21/c, a= 13.632(2), b= 13.758(2), c= 17.246(3)A, β= 96.02(2)°, and Z= 4], the new [Mo2I5(CO)6]– anion has approximately C2v symmetry, the central metal atoms being seven-co-ordinated by three bridging iodides, one terminal iodide and three carbonyl groups; [Mol (CO)3(η6-C6Me6)][Mol3(CO)4], (5)[monoclinic, space group P21/a, a= 24.01 3(3), b= 13.681(3), c= 8.797(3)A, β= 97.86(2)°, and Z= 4]. When the reaction between [Mo(CO)3(η6-C6Me6)] and di-iodine was carried out in a 1 : 2 molar ratio, the tri-iodide complex [Mol(CO)3(η6-C6Me6)]I3 was isolated, while the reaction of [W(CO)3(η6C6H3Me3-1,3,5)] with di-iodine in a 1 : 1 molar ratio gave the tungsten(II) derivative [Wl(CO)3(η6-C6H3Me3-1,3,5)][W2I5(CO)6], (8)[monoclinic, space group P21/c, a= 13.602(2), b= 13.720(2), c= 17.204(3)A, β= 95.99(2)°, and Z= 4]. Compounds (3) and (8) are isostructural. The problem of the arene orientation in the [Ml(CO)3(η6-arene)]+ cations is discussed.

7 citations