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14221-06-8

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14221-06-8 Usage

Description

Molybdenum (II) acetate is a coordination compound with the formula Mo2(O2CCH3)4. It is a yellow, diamagnetic, air-stable solid that is slightly soluble in organic solvents. Molybdenum(II) acetate is an iconic example of a compound with a metal-metal quadruple bond.

Chemical Properties

yellow to greenish needle-like crystals or

Physical properties

Molybdenum (II) Acetate adopts the same Chinese lantern structure as related acetate dimers such as rhodium (II) acetate, copper (II) acetate, and chromium (II) acetate. Each Mo(II) center in Mo2(O2CCH3)4 has four d valence electrons. These eight d-electrons form one σ, two π bonds, and one δ bond, creating a bonding electron configuration of σ2π4δ2. Each of these bonds are formed by the overlapping of pairs of d orbitals.The four acetate groups bridge the two metal centers. The Mo-O bond between each Mo(II) center and O atom from acetate has a distance of 2.119 ?, and the Mo-Mo distance between the two metal centers is 2.0934 ?.

Uses

Molybdenum(II) acetate dimer is generally used as an intermediate compound in a process to form other quadruply bonded molybdenum compounds.

Application

Mo2(O2CCH3)4 is generally used as an intermediate compound in a process to form other quadruply bonded molybdenum compounds The acetate ligands can be replaced to give new compounds such as [Mo2Cl8]4- and Mo2Cl4[P(C4H9)3]4.

Preparation

Mo2(O2CCH3)4is prepared by treating molybdenum hexa carbonyl (Mo (CO)6) with acetic acid. The process strips CO ligands from hexacarbonyl results in the oxidation of Mo (0) to Mo (II). 2 Mo(CO)6 + 4 HO2CCH3 → Mo2(O2CCH3)4 + 12 CO + 2 H2 Trinuclear clusters are byproducts. The reaction of HO2CCH3 and Mo(CO)6 was first investigated by Bannister et al. in 1960. At the time, quadruple metal-metal bonds had not yet been discovered, so these authors proposed that "Mo(O2CCH3)2 was tetrahedral. This perspective changed with Mason's characterization .

Check Digit Verification of cas no

The CAS Registry Mumber 14221-06-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,4,2,2 and 1 respectively; the second part has 2 digits, 0 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 14221-06:
(7*1)+(6*4)+(5*2)+(4*2)+(3*1)+(2*0)+(1*6)=58
58 % 10 = 8
So 14221-06-8 is a valid CAS Registry Number.

14221-06-8 Well-known Company Product Price

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  • Alfa Aesar

  • (18239)  Molybdenum(II) acetate dimer   

  • 14221-06-8

  • 1g

  • 783.0CNY

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  • Alfa Aesar

  • (18239)  Molybdenum(II) acetate dimer   

  • 14221-06-8

  • 5g

  • 2775.0CNY

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  • Alfa Aesar

  • (18239)  Molybdenum(II) acetate dimer   

  • 14221-06-8

  • 25g

  • 11837.0CNY

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  • Aldrich

  • (232076)  Molybdenum(II)acetatedimer  98%

  • 14221-06-8

  • 232076-1G

  • 871.65CNY

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  • Aldrich

  • (232076)  Molybdenum(II)acetatedimer  98%

  • 14221-06-8

  • 232076-5G

  • 2,936.70CNY

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14221-06-8SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 15, 2017

Revision Date: Aug 15, 2017

1.Identification

1.1 GHS Product identifier

Product name molybdenum(2+),tetraacetate

1.2 Other means of identification

Product number -
Other names molybdenum(2+) tetraacetate

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

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More Details:14221-06-8 SDS

14221-06-8Relevant articles and documents

Cotton, F. Albert,Matonic, John H.,Silva, Denise de O.

, (1995)

Dimolybdenum tetracarboxylates as auxiliary chromophores in chiroptical studies of vic-diols

Jawiczuk, Magdalena,Gorecki, Marcin,Suszczynska, Agata,Karchier, Michal,Jazwinski, Jaroslaw,Frelek, Jadwiga

, p. 8250 - 8263 (2013)

The aim of the present work was to check the suitability of dimolybdenum carboxylates, other than commonly used [Mo2(OAc)4], as auxiliary chromophores for determining the absolute configuration of optically active vic-diols by means of electronic circular dichroism (ECD). To this end, a set of dimolybdenum tetracarboxylates was synthesized, and subsequently, the two most promising compounds were selected, namely dimolybdenum tetrakis(μ-pivalate) and tetrakis(μ-isovalerate). The selection was based on their solubility in commonly used solvents, their stability in solution, their tolerance to air exposure, as well as their utility for dichroic studies. The stability of the obtained in situ chiral complexes was verified by measuring the dependence of ECD, UV-vis, and NMR spectra on time, temperature, and concentration. We have shown that the ECD spectra of diverse vic-diols with these complexes are suitable for configurational assignment based on the correlation between signs of Cotton effects (CEs) arising in the spectra and the stereostructure of the ligand. Furthermore, to aid in the interpretation of experimental results, a separate set of DFT calculations has been incorporated to provide additional insight into the structure of the chiral complexes involved. In contrast to the earlier assumptions, experiments showed that the chelating mode of ligation is preferred for the studied complexes.

Hierarchically Ordered Two-Dimensional Coordination Polymers Assembled from Redox-Active Dimolybdenum Clusters

Claire, F. James,Tenney, Stephanie M.,Li, Minyuan M.,Siegler, Maxime A.,Wagner, Justine S.,Hall, Anthony Shoji,Kempa, Thomas J.

, p. 10673 - 10676 (2018)

Coordination polymers (CPs) supporting tunable through-framework conduction and responsive properties are of significant interest for enabling a new generation of active devices. However, such architectures are rare. We report a redox-active CP composed of two-dimensional (2D) lattices of coordinatively bonded Mo2(INA)4 clusters (INA = isonicotinate). The 2D lattices are commensurately stacked and their ordering topology can be synthetically tuned. The material has a hierarchical pore structure (pore sizes distributed between 7 and 33 ?) and exhibits unique CO2 adsorption (nominally Type VI) for an isotherm collected at 195 K. Furthermore, cyclic voltammetry and electrokinetic analyses identify a quasi-reversible feature at E1/2 = -1.275 V versus ferrocene/ferrocenium that can be ascribed to the [Mo2(INA)4]0/-1 redox couple, with an associated standard heterogeneous electron transfer rate constant ks = 1.49 s-1. The tunable structure, porosity, and redox activity of our material may render it a promising platform for CPs with responsive properties.

Preparation of core-shell coordination molecular assemblies via the enrichment of structure-directing codes of bridging ligands and metathesis of metal units

Park, Jinhee,Chen, Ying-Pin,Perry, Zachary,Li, Jian-Rong,Zhou, Hong-Cai

, p. 16895 - 16901 (2014)

A series of molybdenum- and copper-based MOPs were synthesized through coordination-driven process of a bridging ligand (3,3′-PDBAD, L1) and dimetal paddlewheel clusters. Three conformers of the ligand exist with an ideal bridging angle between the two carboxylate groups of 0° (H2α-L1), 120°(H2β-L1), and of 90°(H2γ-L1), respectively. At ambient or lower temperature, H2L1 and Mo2(OAc)4 or Cu2(OAc)4 were crystallized into a molecular square with γ-L1 and Mo2/Cu2 units. With proper temperature elevation, not only the molecular square with γ-L1 but also a lantern-shaped cage with α-L1 formed simultaneously. Similar to how Watson-Crick pairs stabilize the helical structure of duplex DNA, the core-shell molecular assembly possesses favorable H-bonding interaction sites. This is dictated by the ligand conformation in the shell, coding for the formation and providing stabilization of the central lantern shaped core, which was not observed without this complementary interaction. On the basis of the crystallographic implications, a heterobimetallic cage was obtained through a postsynthetic metal ion metathesis, showing different reactivity of coordination bonds in the core and shell. As an innovative synthetic strategy, the site-selective metathesis broadens the structural diversity and properties of coordination assemblies.

Syntheses and structures of di(carboxylato)hexakis(acetonitrile)-dimolybdenum(II) bis(tetrafluoroborate) and trans-[di(μ-acetato)-di(acetonitrile)di(μ-bis(diphenylphosphino)amine) dimolybdenum (II)] bis(tetrafluoroborate)

Cotton, F. Albert,Kühn, Fritz E.

, p. 257 - 264 (1996)

Di(carboxylato)hexakis(acetonitrile)dimolybdenum(II) bis(tetrafluoroborate) s, [Mo2(μ-O2CR)2(CH3CN) 6](BF4)2(R = CH3,CH2Cl, C(CH3)3, CF3) (3a-d), are easily accessible by reacting [Mo2(CH3CN)8](BF4)4 (2) with a stoichiometric amount or a slight excess of the appropriate carboxylic acid and anhydride in acetonitrile. A large excess of carboxylic acid leads to the formation of tetracarboxylates. As an example cis-[Mo2(μ-O2CCH2Cl)2(CH 3CN)6](BF4)2 (3b) has been structurally characterized. Crystallographic data are as follows: space group: I42d (No. 122), a = b = 10.733(2), c = 59.448(5) A?, V = 6848(2) A?3, Z = 8, d(Mo-Mo) = 2.140(1) A?. Trans-[Mo2(μ-O2CCH3)2(dppa) 2(CH3CN)2](BF4)2 (4) can be synthesized from cis-[Mo2(μ-O2CCH3)2(CH 3CN)6](BF4)2 (3a) and bis(diphenylphosphino)amine (dppa) at room temperature. This result contradicts earlier reports where bulky diphosphines such as dppm (sterically very similar to dppa) did not lead to bis-diphosphine products. Furthermore our results indicate that in all the syntheses reported to date for [Mo2(μ-O2CCH3)2(LL) 2](BF4)2 type-compounds [Mo2(μ-O2CCH3)2(CH 3CN)6](BF4)2 acts as the precursor compound. Crystallographic data for 4 are as follows: P21/c (No. 14), a = 19.683(3), b = 15.129(2), c = 21.084(1) A?, β = 101.30(1)°, V = 6848(2) A?3, Z = 4. There are two independent molecules of the cation in the unit cell, d(Mo-Mo) = 2.133(1) and 2.136(1) A?.

Mureinik

, p. 103 (1977)

Synthesis and crystal structure of [Re(CO)3(μ-CH3CO2)(THF)]4

Cotton, F. Albert,Dikarev, Evgeny V.,Petrukhina, Marina A.

, p. 304 - 309 (1999)

A tetrameric complex [Re(CO)3(μ-CH3CO2)(THF)]4 (1) is formed in high yield when the reaction product of Re(CO)5Cl with acetic acid in refluxing 1,2-dichlorobenzene is dissolved in THF. The use of Re2(CO)10 instead of rhenium pentacarbonyl chloride also affords 1. The characterization of 1·3THF·0.5C6H14 has been accomplished by X-ray crystallography. The structure of the tetrameric molecule 1 consists of four rhenium(I) atoms bridged by four acetate ligands. The coordination of each metal center is fulfilled by three CO groups and one THF molecule in a way that all carbonyls are trans to oxygen atoms. The geometry of each acetate bridge is anti-syn providing a Re to Re separation of 5.40 A. This bonding mode is seen here for the first time in rhenium carboxylates. Different coordination types for Re-RCO2 interaction are also discussed in the paper.

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