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: Etude par spectres IR de Fe(CO) 2 (NO) 2 dissous dans Kr liquefie dope par 2% de N 2. Formation apres 4 mn de Fe (CO)(N 2 )(NO)2 and apres 66 mn of Fe(N 2 2 ) 2 (No) 2 as discussed by the authors.
Abstract: Etude par spectres IR de Fe(CO) 2 (NO) 2 dissous dans Kr liquefie dope par 2% de N 2 . Formation apres 4 mn de Fe(CO)(N 2 )(NO) 2 et apres 66 mn de Fe(N 2 ) 2 (NO) 2 . Fe(CO)(N 2 )(NO) 2 est completement stable a ―155°C et est reactif par rapport a CO:Fe(CO)(N 2 )(NO) 2 +CO→Fe(CO) 2 (NO) 2 +N 2
5 citations
TL;DR: In this paper, a linear co-ordination of titanium to a bridging carbonyl and a new geometry of a [cpMo(CO)2]2 fragment caused by a d6-d6(Mo-Mo) electron count were presented.
Abstract: Reaction of (η5-C5Me5)2 Ti-neo-C5H11 with [cpMo(CO)2]2(cp =η5-C5H5) yields the title compound (1); X-ray analysis of (1) shows a 4e (σ,π) Ti–O interaction, resulting in a novel linear co-ordination of titanium to a bridging carbonyl and a new geometry of a [cpMo(CO)2]2 fragment caused by a d6–d6(Mo–Mo) electron count.
5 citations
TL;DR: In this paper, it was shown that reaction of CF3CO2D with [Mo2{σ-OC(O)CF3}(µ-CHCD2)-(CO)4(η-C5H5)2] affords a Mo2 triple-bonded allyl complex which is also formed on protonation.
Abstract: α-Protonation of side-on bonded vinylidenes is indicated by the observations that reaction of CF3CO2D with [Mo2{µ-σ,η2(4e)CCH2}(CO)4(η-C5H5)2] affords [Mo2{σ-OC(O)CF3}(η-CDCH2)(CO)4(η-C5H5)2], whereas, CF3CO2H and [Mo2{µ-σ, η2(4e)CCD2}(CO)4(η-C5H5)2] gives [Mo2{σ-OC(O)CF3}(µ-CHCD2)-(CO)4(η-C5H5)2]; in contrast, reaction of HBF4·Et2O with [Mo2{µ-σ,η2(4e)CCMe2}(CO)4(η-C5H5)2] leads to loss of CO and formation of the Mo2 triple bonded cation [Mo2(µ-η3-2-MeC3 H4)(CO)3(η-C5H 5)2][BF4], an asymmetrically bridged allyl complex which is also formed on protonation of [Mo2{µ-σ:η3-CHC (Me)CH2}(CO)4(η-C5H5)2].
5 citations