Physical properties about Cyclopentane,1,1,2,2,3,3,4,5-octafluoro- are: (1) ACD/LogP: -0.06; (2) # of Rule of 5 Violations: 0; (3) ACD/LogD (pH 5.5): -0.06; (4) ACD/LogD (pH 7.4): -0.06,5f-AKB48; (5) ACD/BCF (pH 5.5): 1; (6) ACD/BCF (pH 7.4): 1 ; (7) ACD/KOC (pH 5.5): 22.07; (8) ACD/KOC (pH 7.4): 22.07; (9) #H bond acceptors: 0; (10) #H bond donors: 0; (11) #Freely Rotating Bonds: 0; (12) Polar Surface Area: 0 Å2; (13) Index of Refraction: 1.279; (14) Molar Refractivity: 24.07 cm3; (15) Molar Volume: 137.2 cm3; (16) Polarizability: 9.54×10-24 cm3; (17) Surface Tension: 12.5 dyne/cm; (18)Density: 1.55 g/cm3; (19) Enthalpy of Vaporization: 28.56 kJ/mol; (20) Boiling Point: 55 °C at 760 mmHg; (21) Vapour Pressure: 254 mmHg at 25 °C.

You can still convert the following datas into molecular structure:
(1) SMILES: FC1(F)C(F)C(F)C(F)(F)C1(F)F
(2) InChI: InChI=1/C5H2F8/c6-1-2(7)4(10,11)5(12,13)3(1,8)9/h1-2H
(3) InChIKey: QVEJLBREDQLBKB-UHFFFAOYAU