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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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