The Osmocene, with CAS registry number 1273-81-0, has the systematic name of osmium(2+) dicyclopenta-2,4-dienide. The chemical formula of this chemical is C₁₀H₁₀Os. And its EINECS is 215-055-8. This chemical is an organoosmium compound found as a white solid. And it can be prepared by the reaction of osmium tetroxide with hydrobromic acid, followed by zinc and cyclopentadiene.

Physical properties of Osmocene: (1)ACD/LogP: 1.79; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.79; (4)ACD/LogD (pH 7.4): 1.79; (5)ACD/BCF (pH 5.5): 13.44; (6)ACD/BCF (pH 7.4): 13.44; (7)ACD/KOC (pH 5.5): 223.49; (8)ACD/KOC (pH 7.4): 223.49; (9)#H bond acceptors: 0; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 0 Å²; (13)Enthalpy of Vaporization: 27.4 kJ/mol; (14)Boiling Point: 41.5 °C at 760 mmHg; (15)Vapour Pressure: 418 mmHg at 25°C.

When you are using this chemical, please be cautious about it as the following:
The Osmocene irritates to eyes, respiratory system and skin. And it is harmful by inhalation, in contact with skin and if swallowed. When use it, please avoid contact with skin and eyes.

You can still convert the following datas into molecular structure:
(1)SMILES: [Os+2].[c-]1cccc1.c1[c-]ccc1
(2)InChI: InChI=1/2C5H5.Os/c2*1-2-4-5-3-1;/h2*1-5H;/q2*-1;+2
(3)InChIKey: RMYKEUKAFJLONI-UHFFFAOYAC
(4)Std. InChI: InChI=1S/2C5H5.Os/c2*1-2-4-5-3-1;/h2*1-5H;/q2*-1;+2
(5)Std. InChIKey: RMYKEUKAFJLONI-UHFFFAOYSA-N