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| Names | |
|---|---|
| IUPAC name dysprosium(3+); (''Z'')-4-oxopent-2-en-2-olate | |
| Other names Dysprosium(III) 2,4-pentanedionate | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
PubChem CID | |
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| Properties | |
| C15H21DyO6 | |
| Molar mass | 459.827 g·mol−1 |
| Appearance | Yellow powder |
| Hazards | |
| GHS labelling: | |
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| Warning | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Dysprosium acetylacetonate is a chemical compound of dysprosium with formula Dy(C5H7O2)3(H2O)n.
Dysprosium acetylacetonate can be prepared by reacting dysprosium [2] or dysprosium hydride [3] with acetylacetone. Dy(acac)3·EtOH·0.5Hacac (where Hacac represents acetylacetone) can be obtained by electrolysis of dysprosium cathode in ethanol solution of acetylacetone, which can be heated to generate Dy(acac)3 through Dy(acac)3·EtOH. [4] It is a colorless solid. Its anhydrous form is stable in dry atmosphere and it forms a hydrate in humid air. [5] It can form Dy(acac)3·2CH3OH and Dy(acac)3·CH3OH·CH3CN in a methanol solution of acetonitrile. [6]
Dysprosium acetylacetonate can be used to catalyze the addition reaction of norbornene and carbon tetrachloride. [7] The dihydrate has been characterized by X-ray crystallography. [8]
Dysprosium(III) chloride (DyCl3), also known as dysprosium trichloride, is a compound of dysprosium and chlorine. It is a white to yellow solid which rapidly absorbs water on exposure to moist air to form a hexahydrate, DyCl3·6H2O. Simple rapid heating of the hydrate causes partial hydrolysis to an oxychloride, DyOCl.
Nickel(II) bis(acetylacetonate) is a coordination complex with the formula [Ni(acac)2]3, where acac is the anion C5H7O2− derived from deprotonation of acetylacetone. It is a dark green paramagnetic solid that is soluble in organic solvents such as toluene. It reacts with water to give the blue-green diaquo complex Ni(acac)2(H2O)2.
Metal acetylacetonates are coordination complexes derived from the acetylacetonate anion (CH
3COCHCOCH−
3) and metal ions, usually transition metals. The bidentate ligand acetylacetonate is often abbreviated acac. Typically both oxygen atoms bind to the metal to form a six-membered chelate ring. The simplest complexes have the formula M(acac)3 and M(acac)2. Mixed-ligand complexes, e.g. VO(acac)2, are also numerous. Variations of acetylacetonate have also been developed with myriad substituents in place of methyl (RCOCHCOR′−). Many such complexes are soluble in organic solvents, in contrast to the related metal halides. Because of these properties, acac complexes are sometimes used as catalyst precursors and reagents. Applications include their use as NMR "shift reagents" and as catalysts for organic synthesis, and precursors to industrial hydroformylation catalysts. C
5H
7O−
2 in some cases also binds to metals through the central carbon atom; this bonding mode is more common for the third-row transition metals such as platinum(II) and iridium(III).
Yttrium(III) sulfate is an inorganic compound with the formula Y2(SO4)3. The most common form is the anhydrate and octahydrate.
Indium(III) nitrate is a nitrate salt of indium which forms various hydrates. Only the pentahydrate has been crystallographically verified. Other hydrates are also reported in literature, such as the trihydrate.
Neodymium perrhenate is an inorganic compound with the chemical formula Nd(ReO4)3, which exists in anhydrous and tetrahydrate. It can be obtained by reacting excess neodymium oxide with 240 g/L perrhenic acid solution. In its solution, NdReO42+ and Nd(ReO4)2+ can be observed with stability constants of 16.5 and 23.6, respectively.
Neodymium acetylacetonate is a coordination compound of neodymium and acetylacetone, with the chemical formula Nd(O2C5H7)3(H2O)2, although some sources ignore the aquo ligands. It commonly occurs as a white powder. Its instablility constants (logYn) are 2.89, 4.15 and 5.26 (corresponding to n = 1, 2, 3). Its dihydrate reacts with carbonyl rhenium complex Re(CO)3X(4,4'-bipy) (X=Cl, Br) to obtain Re(CO)3X(4,4'-bipy)Nd(acac)3.
Europium compounds are compounds formed by the lanthanide metal europium (Eu). In these compounds, europium generally exhibits the +3 oxidation state, such as EuCl3, Eu(NO3)3 and Eu(CH3COO)3. Compounds with europium in the +2 oxidation state are also known. The +2 ion of europium is the most stable divalent ion of lanthanide metals in aqueous solution. Many europium compounds fluoresce under ultraviolet light due to the excitation of electrons to higher energy levels. Lipophilic europium complexes often feature acetylacetonate-like ligands, e.g., Eufod.
Holmium acetylacetonate is a coordination complex, with the chemical formula of Ho(C5H7O2)3 or Ho(acac)3. It can be obtained via the reaction between metallic holmium or holmium(III) hydride with acetylacetone, or via the reaction between holmium(III) chloride and ammonium acetylacetonate. Its anhydrous form is stable in a dry atmosphere but forms a hydrate in humid air.
Terbium compounds are compounds formed by the lanthanide metal terbium (Tb). Terbium generally exhibits the +3 oxidation state in these compounds, such as in TbCl3, Tb(NO3)3 and Tb(CH3COO)3. Compounds with terbium in the +4 oxidation state are also known, such as TbO2 and BaTbF6. Terbium can also form compounds in the 0, +1 and +2 oxidation states.
Scandium perrhenate is an inorganic compound, with the chemical formula Sc(ReO4)3. Its thermal stability is lower than that of the corresponding compounds of the yttrium and lanthanum perrhenates.
Gadolinium perrhenate is an inorganic compound, with the chemical formula of Gd(ReO4)3. It can be obtained by dissolving an excess of gadolinium oxide in a perrhenic acid solution (240 g/L) in the presence of hydrogen peroxide, from which the hydrates are precipitated. Its tetrahydrate loses water by heating to obtain the anhydrous form, which then decomposes at high temperatures to generate gadolinium oxide and rhenium heptoxide.
Praseodymium acetylacetonate is a coordination compound with the chemical formula Pr(C5H7O2)3, or Pr(acac)3 for short. Its instability constants (logYn) are 2.89, 4.17 and 5.29 (corresponding to n=1, 2, 3). It can be prepared by the reaction of trialkoxypraseodymium and acetylacetone. When praseodymium chloride reacts with sodium acetylacetonate or lithium acetylacetonate in the solid phase, praseodymium acetylacetonate can also be obtained, but NaPr(acac)4 or LiPr(acac)4 will also be generated. It can form the green complex Pr(acac)3(phen) with o-phenanthroline.
Erbium acetylacetonate is a coordination compound, with the chemical formula of Er(C5H7O2)3, or Er(acac)3 for short. It can be prepared by the reaction of metal erbium or erbium trihydride and acetylacetone. Erbium chloride could also react with ammonium acetylacetonate to obtain erbium acetylacetonate, which can be recrystallized in toluene. Its anhydrous form is stable in dry atmosphere and forms a hydrate in humid air. The anhydrous form cannot be obtained by heating the hydrate in humid atmosphere. It begins to decompose at 190 °C, and erbium oxide can be obtained by continuous heating at 505 °C.
Lanthanide chlorides are a group of chemical compounds that can form between a lanthanide element and chlorine. The lanthanides in these compounds are usually in the +2 and +3 oxidation states, although compounds with lanthanides in lower oxidation states exist.
Samarium acetylacetonate is a coordination compound with the chemical formula Sm(C5H7O2)3, or Sm(acac)3 for short. It can react with N-bromosuccinimide in chloroform to give light yellow Sm(Br-acac)3 (where Br-acac is 3-bromo-2,4-pentanedione ligand). Its hydrate can be recrystallized in DMSO to obtain Sm(acac)3·2DMSO·H2O. It reacts with dicobalt octacarbonyl and can be used to prepare SmCo5.
Lutetium acetylacetonate is a coordination compound with the chemical formula Lu(C5H7O2)3, or Lu(acac)3 for short. It is isomorphic to ytterbium acetylacetonate. It can be prepared by the reaction of trialkoxylutetium and acetylacetone.
Terbium acetylacetonate is a coordination compound with the chemical formula Tb(C5H7O2)3, or Tb(acac)3 for short. It can be prepared by the reaction of ammonia, acetylacetone and terbium nitrate:
Erbium(III) selenate is an inorganic compound, with the chemical formula Er2(SeO4)3. It exists as an anhydrate or an octahydrate.
Holmium(III) selenate is an inorganic compound with the chemical formula Ho2(SeO4)3. It exists in the anhydrous form and as an octahydrate. It can be obtained by dissolving holmium(III) oxide in selenic acid solution and evaporating and crystallizing it. It co-crystallizes with other selenates in solution to obtain complex salts such as K3Ho(SeO4)3·nH2O, NH4Ho(SeO4)2·3H2O and CH3NH3Ho(SeO4)2·5H2O.
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