US20010020107A1 - Method for producing [IrcodC1]2 - Google Patents
Method for producing [IrcodC1]2 Download PDFInfo
- Publication number
- US20010020107A1 US20010020107A1 US09/757,133 US75713301A US2001020107A1 US 20010020107 A1 US20010020107 A1 US 20010020107A1 US 75713301 A US75713301 A US 75713301A US 2001020107 A1 US2001020107 A1 US 2001020107A1
- Authority
- US
- United States
- Prior art keywords
- cod
- ircl
- washed
- dried
- alcohol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910021639 Iridium tetrachloride Inorganic materials 0.000 claims abstract description 6
- VYXHVRARDIDEHS-QGTKBVGQSA-N (1z,5z)-cycloocta-1,5-diene Chemical compound C\1C\C=C/CC\C=C/1 VYXHVRARDIDEHS-QGTKBVGQSA-N 0.000 claims abstract description 5
- DANYXEHCMQHDNX-UHFFFAOYSA-K trichloroiridium Chemical compound Cl[Ir](Cl)Cl DANYXEHCMQHDNX-UHFFFAOYSA-K 0.000 claims abstract description 4
- 229910021638 Iridium(III) chloride Inorganic materials 0.000 claims abstract description 3
- 238000009835 boiling Methods 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 25
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 18
- 239000000047 product Substances 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 5
- 239000002244 precipitate Substances 0.000 claims description 4
- 239000012065 filter cake Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 239000007795 chemical reaction product Substances 0.000 description 3
- 229910052741 iridium Inorganic materials 0.000 description 3
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- YOLNUNVVUJULQZ-UHFFFAOYSA-J iridium;tetrachloride Chemical compound [Cl-].[Cl-].[Cl-].[Cl-].[Ir] YOLNUNVVUJULQZ-UHFFFAOYSA-J 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
- C07F15/0006—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
- C07F15/0033—Iridium compounds
Definitions
- the invention relates to a method for producing [Ir(cod)Cl] 2 .
- Pannetier, Bonnaire and Fougeroux obtained the complex in a yield of 85% by reacting H 2 IrCl 6 with cod in a mixture of water and ethanol after refluxing for 12 hours (no further information regarding the method of procedure).
- [Ir(cod)Cl] 2 is prepared by the Crabtree method, at first without the addition of water, and is then converted with aqueous sodium acetate to the desired complex compound, which is then recrystallized out of dichloromethane/ethanol.
- the yield in this case is 90-95%, but it entails a multi-step procedure which is therefore complicated and expensive.
- the alkyl moieties of the alcohol are both straight-chain and branched moieties.
- the volumetric ratio of alcohol, especially isopropanol, to water is 2:1 to 1:1, since this ratio has proven good in practice both in regard to the solubility properties of iridium chloride, especially of IrCl 4 , and also in regard to the excellent properties of precipitation of the end product.
- the residual solution freed from the precipitate is again concentrated in an advantageous manner, to about 30 to 50% of its original volume and the precipitate obtained is again filtered out, washed and dried, in order thus to increase the total yield.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Peptides Or Proteins (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
A method for producing [Ir(cod)Cl]2 is proposed, involving
a) Dissolving IrCl4.nH2O and/or IrCl3.nH2O and/or H2IrCl6 in water;
b) Adding an alcohol and cycloocta-1,5-diene and
c) Stirring the solution at the boiling temperature,
characterized in that in step b) at least one alcohol is used having the formula R—OH wherein R=CnH2n+1 and n=3-9, especially isopropanol.
Description
- The invention relates to a method for producing [Ir(cod)Cl] 2.
- In the state of the art there are known several methods for producing [Ir(cod)Cl] 2, namely by the methods of Herde (J. L. Herde, J. C. Lambert and C. V. Senoff: Inorganic Syntheses, 15 (1974), 18), Crabtree (R. H. Crabtree and G. E. Morris, J. Organomet. Chem., 135, 395 (1977), Winkhaus and Singer (Güinter Winkhaus, Hellmut Singer, Chem. Ber., 99 (1966) 3610), Pannetier, Bonnaire and Fougeroux (G. Pannetier, R. Bonnaire et P. Fougeroux, Journal of the Less-Common Metals, 21 91970), 437-438), and Bezman, Bird, Fraser and Osborn (S. A. Benzman, P. H. Bird, A. R. Fraser, J. A. Osborn, Inorganic Chemistry, 12, 1980, 3755).
- Winkhaus and Singer obtained [Ir(cod)Cl] 2 in a 45% yield by reacting Na2IrCl8.6H2O or H2IrCl8.6H2O with cod in a mixture of water and ethanol after 8 to 12 hours of heating with refluxing. After the precipitated crystals were washed with methanol the compound was dried and redissolved in dichloromethane.
- Pannetier, Bonnaire and Fougeroux obtained the complex in a yield of 85% by reacting H 2IrCl6 with cod in a mixture of water and ethanol after refluxing for 12 hours (no further information regarding the method of procedure).
- Bezman, Bird, Fraser and Osborn describe the synthesis of [Ir(cod)Cl] 2 by a modified method of Winkhaus and Singer. Iridium trichloride hydrate, hydroquinone, ethanol, water and cycloocta-1,5-diene are refluxed for 4 hours. Then the solvent is partially distilled out and the precipitated product is filtered out, washed and dried. The yield is only 59%.
- In Herde's method, iridium trichloride hydrate, ethanol, water and cycloocta-1,5-diene is refluxed for 12 hours. After cooling to room temperature the precipitated product is filtered out, washed and dried. A disadvantage of this method is the low yield of only 72%.
- [Ir(cod)Cl] 2 is prepared by the Crabtree method, at first without the addition of water, and is then converted with aqueous sodium acetate to the desired complex compound, which is then recrystallized out of dichloromethane/ethanol. The yield in this case is 90-95%, but it entails a multi-step procedure which is therefore complicated and expensive.
- From what as been stated, the problem arises of at least partially eliminating the above-stated disadvantages by means of a novel process. The present problem consists especially in offering a simple and thus less expensive method for the production of [Ir(cod)Cl] 2 in a high yield.
- This problem is solved according to the invention by a method according to claim 1.
- In the method of the invention, first IrCl 4.nH2O and/or IrCl3.nH2O and/or H2IrCl6 are dissolved in water, then at least one alcohol of the formula R—OH wherein R=CnH2n+1 and n=3-9, especially isopropanol, and cod (cycloocta-1,5-diene) are added and the solution is stirred at the boiling temperature.
- Important to the invention in the proposed method is the use of at least one alcohol of the formula R—OH wherein R=C nH2n+1 and n=3-9, especially isopropanol, which surprisingly in combination with water and cod has both good solvent properties as well as gives excellent precipitation of the end product. (The alkyl moieties of the alcohol are both straight-chain and branched moieties.)
- The ordinary use of ethanol in the Herde process gives considerably lower yields (72%).
- First, it is advantageous if the volumetric ratio of alcohol, especially isopropanol, to water is 2:1 to 1:1, since this ratio has proven good in practice both in regard to the solubility properties of iridium chloride, especially of IrCl 4, and also in regard to the excellent properties of precipitation of the end product.
- It is furthermore advantageous if the molecular ratio of iridium to cod is 1:8.6, since this ratio has proven good in practice.
- After the solution is stirred at ebullition the resultant [Ir(cod)Cl] 2 is filtered out, washed and dried, the solution as a rule being first cooled to room temperature. Such a procedure permits an excellent separation of the [Ir(cod)Cl]2 from the solution.
- It is furthermore advantageous, since it has been proved, if the filter cake (the desired end product) is washed with methanol, especially with cold methanol, and then dried.
- Lastly, the residual solution freed from the precipitate is again concentrated in an advantageous manner, to about 30 to 50% of its original volume and the precipitate obtained is again filtered out, washed and dried, in order thus to increase the total yield.
- It is furthermore advantageous if the [Ir(cod)Cl] 2 product is ground to a maximum grain size of about 0.4 mm, since this coarse powder has good handling properties, such as a satisfactory weigh-out ability.
- The following examples serve to explain the invention:
- 10 g of iridium in the form of IrCl 4.nH2O was dissolved in distilled water. Then 312 ml of isopropanol and 55 ml of cod were added portion-wise and stirred at ebullition for about 19 hours. This resulted in a color change from brown toward an intense red. The reaction itself was performed under inert gas (in this case argon). Upon cooling to room temperature, shiny red crystals of [Ir(cod)Cl]2 precipitated, which were then filtered out and washed with a little cold methanol and dried. The yield was 8.27 g of solid, which corresponds to about 47.4%.
- The filtrate solution was concentrated to about 30%, and again a bright red solid precipitated which was likewise filtered, washed and dried. Thus 7.34 g of the desired product was obtained (42.1% yield).
- The total yield thus amounted to about 90%.
- 10 g of iridium in the form of IrCl 4.nH2O was dissolved in 150 ml of distilled water. Then 312 ml of isopropanol and 55 ml cod were added portion-wise, and stirred for about 6 hours. A color change occurred, from brown toward an intense red. The reaction itself was performed under inert gas (nitrogen in this case). The solution was concentrated to about 50% of its original volume. [Ir(cod)Cl]2 crystals precipitated, which were then filtered out and washed with a little cold methanol and dried. The yield of solids was 16.23 g (about 93%).
- The product obtained was rolled in a ball mill so that the crystal size was less than 0.4 mm.
Claims (9)
1. Method for the preparation of [Ir(cod)Cl]2, by
a) Dissolving IrCl4.nH2O and/or IrCl3.nH2O and/or H2IrCl6 in water,
b) Adding an alcohol and cycloocta-1,5-diene and
c) Stirring the solution at boiling temperature,
characterized in that in step b) at least one alcohol is used of the formula R—OH, wherein R=CnH2n+1 and n=3-9.
2. Method according to , characterized in that in step b) isopropanol is used.
claim 1
3. Method according to either one of to , characterized in that in step c) concentration is performed to about 30 to 50% of its original volume.
claims 1
2
4. Method according to anyone of to , characterized in that the volumetric ratio of alcohol, especially isopropanol, to water amounts to 2:1 to 1:1.
claims 1
3
5. Method according to any one of to . characterized in that the molecular ratio of Ir to COD amounts to 1:7-9.
claims 1
4
6. Method according to any one of to , characterized in that after step c) the [Ir(cod)Cl]2 that has formed is filtered out, washed and dried.
claims 1
5
7. Method according to , characterized in that the filter cake is washed with methanol and then dried.
claim 6
8. Method according to either one of to , characterized in that the residual solution freed of the precipitate is again concentrated to about 30 to 50% of its original volume and the precipitate obtained is again filtered out, washed and dried.
claims 6
7
9. Method according to any one of to , characterized in that the [Ir(cod)Cl]2 product is ground to a maximum crystal size of about 0.4 mm.
claims 1
8
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10000710A DE10000710A1 (en) | 2000-01-10 | 2000-01-10 | Production of di(cyclooctadiene iridium chloride) comprises reacting an iridium compound with 1,5-cyclooctadiene in the presence of an alkanol containing 3-9 carbon atoms |
| DE10000710.4 | 2000-01-10 | ||
| DE10000710 | 2000-01-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| US20010020107A1 true US20010020107A1 (en) | 2001-09-06 |
| US6399804B2 US6399804B2 (en) | 2002-06-04 |
Family
ID=7627107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US09/757,133 Expired - Lifetime US6399804B2 (en) | 2000-01-10 | 2001-01-09 | Method for producing [Ir(cod)Cl]2 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6399804B2 (en) |
| EP (1) | EP1116724B2 (en) |
| DE (2) | DE10000710A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104230999A (en) * | 2014-08-20 | 2014-12-24 | 昆明贵金属研究所 | Method for preparing dicarbonyl iridium acetylacetonate (I) |
| CN106380490A (en) * | 2016-09-09 | 2017-02-08 | 昆明理工大学 | One-step synthesis method of (1,5-cyclooctadiene)-dichloro iridium dipolymer |
| CN115304646A (en) * | 2022-08-19 | 2022-11-08 | 云南弘盛铂业新材料科技有限公司 | Preparation method of 1,5-cyclooctadiene iridium chloride dimer |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6878830B2 (en) * | 2001-07-13 | 2005-04-12 | Board Of Trustees Of Michigan State University | Catalytic boronate ester synthesis from boron reagents and hydrocarbons |
| CN106220688B (en) * | 2016-08-15 | 2019-05-03 | 北京颖泰嘉和生物科技股份有限公司 | A kind of preparation method of 1,5- cyclo-octadiene iridium chloride dimer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5962741A (en) * | 1996-11-19 | 1999-10-05 | Novartis Ag | Process for the production of aromatic halogen-amino compounds |
-
2000
- 2000-01-10 DE DE10000710A patent/DE10000710A1/en not_active Withdrawn
- 2000-12-19 DE DE50013395T patent/DE50013395D1/en not_active Expired - Lifetime
- 2000-12-19 EP EP00127772.2A patent/EP1116724B2/en not_active Expired - Lifetime
-
2001
- 2001-01-09 US US09/757,133 patent/US6399804B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104230999A (en) * | 2014-08-20 | 2014-12-24 | 昆明贵金属研究所 | Method for preparing dicarbonyl iridium acetylacetonate (I) |
| CN106380490A (en) * | 2016-09-09 | 2017-02-08 | 昆明理工大学 | One-step synthesis method of (1,5-cyclooctadiene)-dichloro iridium dipolymer |
| CN115304646A (en) * | 2022-08-19 | 2022-11-08 | 云南弘盛铂业新材料科技有限公司 | Preparation method of 1,5-cyclooctadiene iridium chloride dimer |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1116724B2 (en) | 2014-09-10 |
| DE10000710A1 (en) | 2001-07-26 |
| EP1116724A3 (en) | 2002-11-06 |
| DE50013395D1 (en) | 2006-10-12 |
| EP1116724B1 (en) | 2006-08-30 |
| US6399804B2 (en) | 2002-06-04 |
| EP1116724A2 (en) | 2001-07-18 |
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