Hafnocene dichloride

Hafnocene dichloride

Names
Other names bis(cyclopentadienyl)hafnium dichloride
Identifiers
CAS Number	12116-66-4
3D model ( JSmol )	Interactive image
ChemSpider	10654717
ECHA InfoCard	100.031.967
EC Number	235-177-5
PubChem CID	24942143
InChI InChI=1S/2C5H5.2ClH.Hf/c2*1-2-4-5-3-1;;;/h2*1-3H,4H2;2*1H;/q2*-1;;;+4/p-2 Key: IXKLRFLZVHXNCF-UHFFFAOYSA-L
SMILES C1C=CC=[C-]1.C1C=CC=[C-]1.[Cl-].[Cl-].[Hf+4]
Properties
Chemical formula	C10H10Cl2Hf
Molar mass	379.58 g·mol−1
Appearance	white solid
Melting point	230–233 °C (446–451 °F; 503–506 K)
Hazards
GHS labelling:[1]
Pictograms
Signal word	Danger
Hazard statements	H314, H315, H319, H335
Precautionary statements	P260, P261, P264, P264+P265, P271, P280, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P351+P338, P305+P354+P338, P316, P319, P321, P332+P317, P337+P317, P362+P364, P363, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Hafnocene dichloride is the

It is prepared by a salt metathesis reaction from

2 NaC₅H₅ + HfCl₄ → (C₅H₅)₂HfCl₂ + 2 NaCl

Derivatives

Hydrolysis gives the trimer [(C₅H₅)₂HfO]₃.^[2]

The chloride ligands can be replaced by other halides.^[3]

The bis(phosphide) (C₅H₅)₂Hf(PR₂)₂ can be prepared by salt metathesis from hafnocene dichloride.^[4]

References