| Company Name: |
Shanghai Jiachu bio-engineering Co. , Ltd.
|
| Tel: |
021-59905313 15399629998 |
| Email: |
order@shanghaishengwu.com |
| Products Intro: |
Cas:
ProductName:Schwartz Differential Medium T1764
Purity: 250g/瓶 | Package: T1764：RMB 280
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| Company Name: |
G-CLONE
|
| Tel: |
400-910-1997 17560619001 |
| Email: |
3243204476@qq.com |
| Products Intro: |
Cas:
ProductName:Melzer's reagent (MELZER'S REAGENT)
Purity: 99% | Package: 50mL
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- Bredereck's reagent
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- $11.00 / 25g
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2024-04-12
- CAS:5815-08-7
- Min. Order: 25g
- Purity: 0.90
- Supply Ability: 200kg
- Burgess reagent
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- $5.00 / 1KG
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2024-01-14
- CAS:29684-56-8
- Min. Order: 1KG
- Purity: 99%
- Supply Ability: g-kg-tons, free sample is available
- EATON'S REAGENT
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- $1.00 / 1KG
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2019-07-12
- CAS:39394-84-8
- Min. Order: 1KG
- Purity: 99%
- Supply Ability: 25kg
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| | Schwartz Reagent Basic information | | Reaction |
| | Schwartz Reagent Chemical Properties |
| Melting point | 300 °C | | storage temp. | Keep in dark place,Inert atmosphere,2-8°C | | form | Powder | | color | off-white | | Water Solubility | reacts | | Sensitive | Light, Air & Moisture Sensitive | | Hydrolytic Sensitivity | 8: reacts rapidly with moisture, water, protic solvents | | Merck | 14,8396 | | Exposure limits | ACGIH: TWA 5 mg/m3; STEL 10 mg/m3
NIOSH: IDLH 25 mg/m3; TWA 5 mg/m3; STEL 10 mg/m3 | | CAS DataBase Reference | 37342-97-5(CAS DataBase Reference) |
| | Schwartz Reagent Usage And Synthesis |
| Physical properties |
Schwartz Reagent is a white microcrystalline powder. Under the influence of light or heat the color changes to pink, then gradually to dark red.It is sensitive to moisture; it is virtually insoluble in the usual organic solvents such as ethers, consistent with its polymeric character.
| | Uses | Schwartz Reagent is named after Jeffrey Schwartz, a chemistry professor at Princeton University. This metallocene is used in organic synthesis for various transformations of alkenes and alkynes.
| | Preparation |
Schwartz Reagent can be purchased or readily prepared by reduction of zirconocene dichloride with lithium aluminium hydride:
(C5H5)2ZrCl2 + 1⁄4 LiAlH4 → (C5H5)2ZrHCl + 1⁄4 LiAlCl4
This reaction also affords (C5H5)2ZrH2, which is treated with methylene chloride to give Schwartz Reagent.
| | Reactions | Schwartz's reagent reacts with alkenes and alkynes via the process called hydrozirconation which formally results in the addition of the Zr-H bond across the C=C or C≡C bond.
| | Structure and conformation |
Schwartz Reagent adopts the usual "clam-shell" structure seen for other Cp2MXn complexes.The dimetallic structure has been confirmed by Microcrystal electron diffraction.The results are consistent with FT-IR spectroscopy, which established that the hydrides are bridging. Solid state NMR spectroscopy also indicates a dimeric structure.
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| | Schwartz Reagent Preparation Products And Raw materials |
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