BIS(CYCLOPENTADIENYL)ZIRCONIUM DIHYDRIDE Chemical Properties

storage temp. 

Flammables + water-Freezer (-20°C)e area

solubility 

insol common solvents

form 

Powder

Water Solubility 

It reacts with water.

Sensitive 

Air & Moisture Sensitive

CAS DataBase Reference

37342-98-6

Safety Information

Hazard Codes 

F,C

Risk Statements 

11-15-34

Safety Statements 

16-26-27-36/37/39

RIDADR 

UN 3131 4.3/PG 2

WGK Germany 

3

F 

8-10

HazardClass 

4.3

PackingGroup 

II

HS Code 

29319090

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

BIS(CYCLOPENTADIENYL)ZIRCONIUM DIHYDRIDE Usage And Synthesis

Chemical Properties

White powder, discolors on air exposure

Physical properties

Physical Data of BIS(CYCLOPENTADIENYL)ZIRCONIUM DIHYDRIDE: polymeric in solid and dimeric [Cp2ZrH(μ-H)]2 in benzene or toluene. The polymeric nature of [Cp2ZrH2]n is suggested by its involatility, insolubility, and insusceptibility to reaction in air. The presence of a ZrH-Zr bridging system is inferred from the intense broad IR absorption band at 1520 cm-1.

Uses

Bis(cyclopentadienyl)zirconium dihydride, is used as a pharmaceutical intermediate and in chemical industry.

Uses

BIS(CYCLOPENTADIENYL)ZIRCONIUM DIHYDRIDE is a catalyst for hydrogenation of alkenes and alkynes in combination with hydrogen; catalyst for Meerwein-Ponndorf-Verley type reduction and Oppenauer type oxidation; catalyst for crossed-aldol condensation; catalyst for Tishchenko reaction; reducing agent for organohalogen compounds.

Preparation

Preparative Methods of BIS(CYCLOPENTADIENYL)ZIRCONIUM DIHYDRIDE: the following method is convenient for the preparation of Cp2ZrH2. μ-Oxobis[chlorobis(η5- cyclopentadienyl)zirconium] ([Cp2ZrCl]2O) is prepared by the reaction of Dichlorobis(cyclopentadienyl)zirconium (Cp2ZrCl2), available from commercial sources, in dichloromethane and water in aniline. To a solution of [Cp2ZrCl]2O in THF is added dropwise Lithium Aluminum Hydride in THF with stirring under an argon atmosphere. The reaction mixture is stirred for ca. 8 h at rt, filtered, and then washed with THF to give the Cp2ZrH2 complex as a white solid (eq 1)^[1].

storage

BIS(CYCLOPENTADIENYL)ZIRCONIUM DIHYDRIDE is photosensitive and hydrolyzed by water; should be stored in the dark under an argon atmosphere.

References

1. Wailes, P. C.; Weigold, H. Inorg. Synth. 1990, 28, 257.

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