The Silane, tetraethynyl- has the CAS registry number 1849-38-3. This chemical's molecular formula is C₈H₄Si and molecular weight is 128.2. What's more, its systematic name is tetraethynylsilane.

Physical properties of Silane, tetraethynyl- are: (1)ACD/LogP: 5.12; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 5.12; (4)ACD/BCF (pH 5.5): 4613.66; (5)ACD/KOC (pH 5.5): 14598.78; (6)Index of Refraction: 1.507; (7)Molar Refractivity: 39.14 cm³; (8)Molar Volume: 131.3 cm³; (9)Polarizability: 15.51×10^-24cm³; (10)Surface Tension: 37.7 dyne/cm; (11)Density: 0.975 g/cm³; (12)Flash Point: 24.8 °C; (13)Enthalpy of Vaporization: 35.62 kJ/mol; (14)Boiling Point: 134.1 °C at 760 mmHg; (15)Vapour Pressure: 10.1 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)Canonical SMILES: C#C[Si](C#C)(C#C)C#C
(2)InChI: InChI=1S/C8H4Si/c1-5-9(6-2,7-3)8-4/h1-4H
(3)InChIKey: NHGIJSUUPMVIIZ-UHFFFAOYSA-N