| 词条 | Molybdenum(II) acetate |
| 释义 |
| Watchedfields = changed | verifiedrevid = 447778735 | IUPACName = | OtherNames = Dimolybdenum tetraacetate, tetra (aceto) dimolybdenum, Molybdenum(II) acetate dimer | ImageFile = Molybdenum(II) acetate.svg |Section1={{Chembox Identifiers | CASNo_Ref = {{cascite|correct|??}} | CASNo = 14221-06-8 | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} | ChemSpiderID = 76023 | StdInChI_Ref = {{stdinchicite|correct|chemspider}} | StdInChI = 1S/4C2H4O2.2Mo/c4*1-2(3)4;;/h4*1H3,(H,3,4);;/q;;;;2*+2/p-4 | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} | StdInChIKey = DOOLFANBWPPEGQ-UHFFFAOYSA-J | SMILES = [Mo-2]1234#[Mo-2]([o+]c(C)o1)([o+]c(C)o2)(oc(C)[o+]3)oc(C)[o+]4 | PubChem = |Section2={{Chembox Properties | Formula = C8H12Mo2O8 | MolarMass = 428.1010 g/mol | Appearance = Yellow solids | Density = | Solubility = not soluble | BoilingPt = decomposes |Section7={{Chembox Hazards | ExternalSDS = [https://fscimage.fishersci.com/msds/98963.htm External MSDS] | FlashPt = | RPhrases = 20/21/22, 36/37/38 | SPhrases = 7/9, 22, 24/25, 29/35, 42, 43, 64 |Section8={{Chembox Related | OtherCompounds = Copper(II) acetate Chromium(II) acetate }}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.[1] Structure and bondingIt adopts the same Chinese lantern structure as related acetate dimers such as rhodium(II) acetate, copper(II) acetate, and chromium(II) acetate.[2] 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.[3] 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 Å, and the Mo-Mo distance between the two metal centers is 2.0934 Å. PreparationMo2(O2CCH3)4is prepared by treating molybdenum hexacarbonyl (Mo(CO)6) with acetic acid. The process strips CO ligands from hexacarbonyl results in the oxidation of Mo(0) to Mo(II).[4][5] 2 Mo(CO)6 + 4 HO2CCH3 → Mo2(O2CCH3)4 + 12 CO + 2 H2 Trinuclear clusters are byproducts.[6] 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.[7][8] This perspective changed with Mason's characterization.[9] ApplicationsMo2(O2CCH3)4 is generally used as an intermediate compound in a process to form other quadruply bonded molybdenum compounds.[1] The acetate ligands can be replaced to give new compounds such as [Mo2Cl8]4− and Mo2Cl4[P(C4H9)3]4.[1][10][11] References1. ^1 2 Girolami, G. S.; Rauchfuss, T. B. and Angelici, R. J., "Synthesis and Technique in Inorganic Chemistry third edition", University Science Books: Mill Valley, CA, 1999, {{ISBN|0-935702-48-2}} {{clear}}{{Acetates}}{{DEFAULTSORT:Molybdenum(Ii) Acetate}}2. ^Cotton, F. A.; Hillard, E.A.; Murillo, C. A.; Zhou, H.-C. "After 155 Years, A Crystalline Chromium Carboxylate with a Supershort Cr-Cr Bond" J. Am. Chem. Soc., 2000, 122, 416-417. {{DOI|10.1021/ja993755i}}. 3. ^Blaudeau, J. P.; Pitzer, R. M. “ Ab Initio Studies of Ligand Effects on the Metal-Metal Bond in Dimolybdenum Complexes” J.Phys. Chem. 1994, vol. 98, pp. 4575-4579. 4. ^Brignole, A.G.; Cotton, F.A., “Rhenium and Molybdenum compounds containing quadruple compounds” Inorg. Synth. 1972, volume 13, pp. 81-89. {{DOI|10.1002/9780470132449.ch15}} 5. ^Pence, L. E.; Weisgerber, A. M.; Maounis, F.A.; “Synthesis of Molybdenum-Molybdenum Quadruple Bonds” J. Chem. Educ., 1999, vol. 76, 404-405. 6. ^Bino,A.; Cotton, F.A.; Dori, A.; J. Am. Chem. Soc. 1981, vol. 103, pp. 243-244. “A Aqueous New Chemistry of Organometallic, Trinuclear Cluster Compounds of Molybdenum”. 7. ^Bannister, E.; Wikinson, G. “Molybdenum(II) carboxylates” Chem. Ind. 1960, 319. 8. ^Stephenson, T.A.; Bannister, E.; Wilkinson, G. “Molybdenum(II) Carboxylates” J. Chem. Soc., 1964, pp. 2538. {{DOI|10.1039/JR9640002538}} 9. ^D. Lawton, R. Mason "The Molecular Structure of Molybdenum(II) Acetate"J. Am. Chem. Soc. 1965, vol 87, pp 921–922. {{DOI|10.1021/ja01082a046}} 10. ^Tsai, Y.C.; Chen H.Z.; Chang, C.C.; Yu, J.K.; Lee, G.H.; Wang, Y.; Kuo, T.S. “Journey from Mo-Mo Quadruple Bonds to Quintuple Bonds” J. Am. Chem. Soc.,2009, 131, 12534-12535. {{DOI|10.1021/ja905035f}} 11. ^Handa, M.; Mikuriya, M.; Kotera, T.; Yamada, K.; Nakso, T.; Matsumoto, H.; Kasuga, K. “Linear Chain Compounds of Molybdenum(II) Acetate Linked by Pyazine, 4,4’-Bipyridine,and 1,4- Diazabicyclo[2.2.2]octane” Bull. Chem. Soc. Jpn., 1995,68, 2567-2572. 2 : Acetates|Molybdenum compounds |
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