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: Benzonorbornadiene and 2,3 bis(trifluoromethyl)norbornadienes can be polymerized by Mo(CH-t-Bu) in a well-behaved living manner to give essentially monodisperse homopolymers as mentioned in this paper.
Abstract: : Benzonorbornadiene 2,3-dicarbomethoxynorbornadiene and 2,3- bis(trifluoromethyl)norbornadiene can be polymerized by Mo(CH-t-Bu)(NAr)(O-t-Bu) 2(Mo(CH-t-Bu)) in a well-behaved living manner to give essentially monodisperse homopolymers. Two of the polymers and (especially) poly 5 are highly trans, and are believed to be tactic. The rate of polymerization is approximately thirty times faster at room temperature, a factor of approximately ten of which can be ascribed to the lower reactivity and the remainder to the lower reactivity relative to 7-Isopropylidene-2-3-dicarbomethoxynorbornadiene is not polymerized at all by Mo(CH-t-Bu), although it does react with Mo(CH-t-Bu). An X-ray structure shows it to be a pseudo-tetrhedral species containing a syn alkylidene ligand (substituent pointing toward the imido nitrogen atom).
311 citations
221 citations
163 citations
TL;DR: Preparation des complexes MO(CCMe 3 )(CH 2 CME 3 ) 3, et des complexes Mo(CCme 3 )X 3 (dme) as discussed by the authors.
Abstract: Preparation des complexes MO(CCMe 3 )(CH 2 CMe 3 ) 3 , et des complexes Mo(CCMe 3 )X 3 (dme). Les acetylenes internes ne reagissent pas avec MO(CCMe 3 )(OCMe 3 ) 3 ; ils sont grandement polymerises par MO(CCMe 3 )(OCHMe 2 ) 3 et MO(CCMe 3 )(OCH 2 CMe 3 ) 3 . Structure cristalline
145 citations