This chemical is called Bis(pentamethylcyclopentadienyl)hafnium dichloride, and it can also be named as hafnium(2+), bis(2,3,4,5,5-pentamethyl-1,3-cyclopentadien-1-yl)-, chloride (1:2). With the molecular formula of C₂₀H₃₀Cl₂Hf, its molecular weight is 519.85. The CAS registry number of this chemical is 85959-83-7. Additionally, this chemical is light yellow to yellow-beige crystals.

Other characteristics of the Bis(pentamethylcyclopentadienyl)hafnium dichloride can be summarised as followings: (1)#H bond acceptors: 0; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 2.

When you are using this chemical, please be cautious about it as the following: This chemical is irritating to eyes, respiratory system and skin, so you should wear suitable protective clothing when you use it. In case of contacting with eyes, rinse immediately with plenty of water and seek medical advice.

You can still convert the following datas into molecular structure: 
1.SMILES: [Cl-].[Cl-].CC2(C)C(\[Hf+2]\C1=C(/C)\C(\C)=C(\C)C1(C)C)=C(\C)C(\C)=C2\C
2.InChI: InChI=1/2C10H15.2ClH.Hf/c2*1-7-6-10(4,5)9(3)8(7)2;;;/h2*1-5H3;2*1H;/q;;;;+2/p-2/rC20H30Hf.2ClH/c1-11-13(3)17(19(7,8)15(11)5)21-18-14(4)12(2)16(6)20(18,9)10;;/h1-10H3;2*1H/q+2;;/p-2
3.InChIKey: MAKWXIFKUIEBMT-OMSMHWNGAV