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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 paper, a Voltammetrie cyclique cyclique de tous les complexes is used to reduce the number of reduits of all the complexes in a given complex.
Abstract: Preparation des complexes [LM(CO) 2 NO]PF 6 qui contiennent un groupe {M-NO} 6 . L'halogenation donne des complexes cationiques [LM(NO)X 2 ] + qui peuvent etre reduits en [LM(NO)X 2 ]. Voltammetrie cyclique de tous les complexes

14 citations

Journal ArticleDOI
TL;DR: In this article, the applicability of /sup 14/N NMR in combination with /sup 95/Mo NMR and /sup 13/C NMR to the study of the thionitrosyl complexes of Cr, Mo, and V is described.
Abstract: The applicability of /sup 14/N NMR in combination with /sup 95/Mo NMR and /sup 13/C NMR to the study of the thionitrosyl complexes of Cr, Mo, and V is described. This technique provides specific experimental information on the relative electron distribution and bonding of the nitrosyls and thionitrosyls with metals. The ir and uv-visible spectral results for the complexes are presented in tabular form.

14 citations

Journal ArticleDOI
TL;DR: An X-ray crystallographic study has shown that the intensely-coloured products which result from the anomalous reaction of arenediazonium cations with [Mo(CO)3{HB(3,5-Me2C3HN2)}3] as mentioned in this paper are η2-aroyl dicarbonyl derivatives of MoII, rather than η1-aryl tricaronyl complexes as originally proposed, the formation of which has been interpreted in terms of a free-radical mechanism for the reaction.
Abstract: An X-ray crystallographic study has shown that the intensely-coloured products which result from the anomalous reaction of arenediazonium cations with [Mo(CO)3{HB(3,5-Me2C3HN2)}3]– are η2-aroyl dicarbonyl derivatives of MoII, [Mo(η2-COAr)(CO)2{HB(3,5-Me2C3HN2)3}] rather than η1-aryl tricarbonyl complexes as originally proposed: a by-product formed when the reaction is carried out in the presence of cyclohexane has been identified by X-ray crystallographic methods as the η2-hexahydrobenzoyl complex [Mo(η2-COC6H11)(CO)2{HB(3,5-Me2C3HN2)3}] the formation of which has been interpreted in terms of a free-radical mechanism for the reaction.

14 citations