The Organometallic and Metal-Organic Chemistry of Molybdenum
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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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
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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TL;DR: In this article, evidence is presented for "in-place" rotation of the methyl groups of agostic η2-ethyl systems leading to hydrogen scrambling in ethylene-hydride complexes.
Abstract: Evidence is presented for ‘in-place’ rotation of the methyl groups of agostic η2-ethyl systems leading to hydrogen scrambling in ethylene–hydride complexes.
9 citations
TL;DR: The combined evidence from n.m.r. spectra, including kinetic studies, and from the preparation and reactions of intermediates shows that the η-ethylbenzene compound is formed by the sequence [Mo(η-C6H6)(dmpe)(ε-C2H4)H]+.
Abstract: The cis-ethylenehydride compounds [Mo(η-C6H6)(L2)(η-C2H4)H]PF6[L2= Me2PCH2CH2PMe2(dmpe) or o-C6H4(EMe2)2(E = P, pdmp, or As, pdma)] react with trimethylphosphine to give the η-ethylbenzene compounds [Mo(η-C6H5Et)(L2)(PMe3)H]PF6. Detailed studies of the mechanism of this reaction show that there is an initial reaction, at low temperatures, giving isomeric mixtures of thermally unstable η-cyclohexadienyl derivatives [Mo(η-C6H7)(dmpe)(PMe3)(η-C2H4)]+. The combined evidence from n.m.r. spectra, including kinetic studies, and from the preparation and reactions of intermediates shows that the η-ethylbenzene compound is formed by the sequence [Mo(η-C6H6)(dmpe)(η-C2H4)H]+→[Mo(η-C6H6)(dmpe)(PMe3)Et]+→[Mo(η-C6H6Et-endo)(dmpe)(PMe3)(solvent)]+→[Mo(η-C6H5Et)(dmpe)(PMe3)]+ H+→[Mo(η-C6H5Et)(dmpe)(PMe3)H]+. The following new compounds have been prepared and characterised: [Mo(η-C6H6){P(OMe)3}2(η-C3H5)] PF6, [Mo(η-C6H6)(pdmp)(η-C3H5)]PF6, [Mo(η-C6H6)(pdma)(η-C3H5)]PF6, [Mo(η-C6H6)(pdmp)(η-C2H4)], [Mo(η-C6H6)(pdma)(η-C2H4)], [Mo(η-C6H6)(pdmp)(η-C2H4)H]PF6, [Mo(η-C6H6)(pdma)(η-C3H5)]PF6, [Mo(η-C6H6)(pdmp)(η-C2H4)], [Mo(η-C6H6)(pdma)(η-C2H4)], [Mo(η-C6H6)(pdmp)(η-C2H4)H]PF6, [Mo(η-C6H6)(pdma)(η-C2H4)H]PF6, [Mo(η-C6H5Et)(pdmp)(PMe3)H]PF6, [Mo(η-C6H5Et)(pdma)(PMe3)H]PF6, [Mo(η-C6H6)(dmpe)(PMe3)D]PF6, [Mo(η-C6H6)(dmpe)(η-C2H4)], [Mo(η-C6H6Et-endo)(dmpe)2]PF6, [Mo(η-C6H6)(dmpe){P(OMe)3}H]PF6, [Mo(η-C6H6)(dmpe)(CO)H]PF6, [Mo(η-C6H6)(dmpe)(2,6-Me2C6H3 NC)]PF6, [Mo(η-C6H5Me)(dmpe)(η-C2H4)H]PF6, [Mo(C6H4Me-2-Et-1)(dmpe)(PMe3)H]PF6, [Mo(C6H4Me-3-Et-1)(dmpe)(PMe3)H]PF6, [Mo(C6H5Me-1-Et-6-endo)(dmpe)2]PF6, [Mo(C6H5Me-2-Et-6-endo)(dmpe)2]PF6, and [Mo(η-C6H6Et-endo)(pdmp)2]PF6.
9 citations
9 citations
TL;DR: The complete manuscript of this communication appears in: Angew. Chem. Suppl. 1982, 1116 as mentioned in this paper, 1116] and the full manuscript of the complete manuscript appeared in:
Abstract: The complete manuscript of this communication appears in: Angew. Chem. Suppl. 1982, 1116. DOI:10.1002/anie.198211160
9 citations
9 citations