The Pentamethylcyclopentadienylhafnium trichloride with cas registry number of 75181-08-7, belongs to the following product categories: (1)Catalysis and Inorganic Chemistry; (2)Chemical Synthesis; (3)Hafnium. And its systematic name is (2,3,4,5,5-pentamethylcyclopenta-1,3-dien-1-yl)hafnium(3+) trichloride.

When you are using this chemical, please be cautious about it as the following:
The Pentamethylcyclopentadienylhafnium trichloride irritates to eyes, respiratory system and skin. When use it, wear suitable protective clothing, gloves and eye/face protection. If contact 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-].[Cl-].CC1(C)C(\[Hf+3])=C(\C)C(\C)=C1\C;
(2)InChI:InChI=1/C10H15.3ClH.Hf/c1-7-6-10(4,5)9(3)8(7)2;;;;/h1-5H3;3*1H;/q;;;;+3/p-3/rC10H15Hf.3ClH/c1-6-7(2)9(11)10(4,5)8(6)3;;;/h1-5H3;3*1H/q+3;;;/p-3;
(3)InChIKey:JXLWXGXLUOSGJG-WSAZBFCBAY;
(4)Std. InChI:InChI=1S/C10H15.3ClH.Hf/c1-7-6-10(4,5)9(3)8(7)2;;;;/h1-5H3;3*1H;/q;;;;+3/p-3;
(5)Std. InChIKey:JXLWXGXLUOSGJG-UHFFFAOYSA-K