The Hafnium,tetrakis(2,4-pentanedionato-kO₂,kO₄)-,(SA-8-11''11''1'1'''1'1''')-, with the CAS registry number 17475-67-1, has the systematic name of hafnium; (Z)-4-oxopent-2-en-2-olate. It is a kind of organics, and should be stored in the dry and cool environment. And the molecular formula of the chemical is C₂₀H₂₈HfO₈.

The characteristics of Hafnium,tetrakis(2,4-pentanedionato-kO₂,kO₄)-,(SA-8-11''11''1'1'''1'1''')- are as followings: (1)#H bond acceptors: 8; (2)#H bond donors: 4; (3)#Freely Rotating Bonds: 8; (4)Polar Surface Area: 160.52 Å².  

You should be cautious while dealing with this chemical. It irritates to eyes, respiratory system and skin. Therefore, you had better take the following instructions: Wear suitable protective clothing, gloves and eye/face protection, and if in case of contacting with eyes, rinse immediately with plenty of water and seek medical advice.

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: [Hf].O=C(C)\C=C(/[O-])C.[O-]\C(C)=C/C(C)=O.[O-]\C(C)=C/C(C)=O.[O-]\C(C)=C/C(C)=O
(2)InChI: InChI=1/4C5H8O2.Hf/c4*1-4(6)3-5(2)7;/h4*3,6H,1-2H3;/p-4/b4*4-3-;
(3)InChIKey: XFRUSXFSJAEXPU-BVJZXTFABD