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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, the reaction between the terminal alkyne complex with HBF4·OEt2 causes a structural rearrangement in which the protonated but-2-yne is inserted into one of the Mo-P bonds to give a bridging Ph2PC(Me)CHMe vinylphosphine ligand; the structure of the product has been confirmed by X-ray diffraction.
Abstract: The reaction between the alkyne complex [Mo2(µ-C2Me2)(CO)4(η-C5H5)2] and P2Ph4 in refluxing toluene affords a 42% yield of [Mo2(µ-PPh2)2(CO)(η-C2Me2)(η-C5H5)2]. An X-ray diffraction study has revealed that the but-2-yne ligand is co-ordinated to only one molybdenum atom, and that the molecule contains a planar Mo2(µ-PPh2)2 unit with a formal Mo–Mo double bond of length 2.865(1)A. Several other minor products are discussed in relation to the proposed mechanism of the reaction. Reaction of the terminal alkyne complex with HBF4·OEt2 causes a structural rearrangement in which the protonated but-2-yne is inserted into one of the Mo–P bonds to give a bridging Ph2PC(Me)CHMe vinylphosphine ligand; the structure of the product has been confirmed by X-ray diffraction.

23 citations

Journal ArticleDOI
TL;DR: In this article, the metallacyclopropene complex was identified by X-ray crystallography, which rearranges quantitatively into the alkylidyne complex [MoC.CH2SiMe3{P(OMe)3}2(η5-C9H7)].
Abstract: Reaction of [Mo{P(OMe)3}2(Me3SiC2H)(η5-C9H7)][BF4] with K[BHBus3] affords the metallacyclopropene [[graphic omitted]H2{P(OMe)3}2(η5-C9H7)], structurally identified by X-ray crystallography, which rearranges quantitatively into the alkylidyne complex [MoC.CH2SiMe3{P(OMe)3}2(η5-C9H7)].

23 citations

Journal ArticleDOI
TL;DR: In this article, the driving force for each step in the catalytic cycle was evaluated for ligand substitution in carbonylmanganese derivatives, using a cationic chain mechanism.
Abstract: Electrocatalysis of ligand substitution in carbonylmanganese derivatives proceeds by a cationic chain mechanism, and the driving force for each step in the catalytic cycle can be evaluated.

23 citations

Journal ArticleDOI
TL;DR: The reaction between K[Mo(CO) 3 (η-C5H 5 )] and the phosphaalkene CIP=C(SiMe 3 ) 2, affords the molybdenum phosphavinylidene complex.

23 citations