isobutene C4H8 structure – Flashcards
Flashcard maker : Jill Lopez
Contents
| Molecular Formula | C4H8 |
| Average mass | 56.106 Da |
| Density | 0.6±0.1 g/cm3 |
| Boiling Point | -5.0±7.0 °C at 760 mmHg |
| Flash Point | -69.5±2.4 °C |
| Molar Refractivity | 20.1±0.3 cm3 |
| Polarizability | 8.0±0.5 10-24cm3 |
| Surface Tension | 15.1±3.0 dyne/cm |
| Molar Volume | 89.5±3.0 cm3 |
- Experimental data
- Predicted – ACD/Labs
- Predicted – EPISuite
- Predicted – ChemAxon
- Experimental Physico-chemical Properties
- Miscellaneous
- Gas Chromatography
Predicted data is generated using the ACD/Labs Percepta Platform – PhysChem Module
| Density: | 0.6±0.1 g/cm3 |
| Boiling Point: | -5.0±7.0 °C at 760 mmHg |
| Vapour Pressure: | 2143.2±0.0 mmHg at 25°C |
| Enthalpy of Vaporization: | 23.5±0.8 kJ/mol |
| Flash Point: | -69.5±2.4 °C |
| Index of Refraction: | 1.368 |
| Molar Refractivity: | 20.1±0.3 cm3 |
| #H bond acceptors: | 0 |
| #H bond donors: | 0 |
| #Freely Rotating Bonds: | 0 |
| #Rule of 5 Violations: | 0 |
| ACD/LogP: | 2.39 |
| ACD/LogD (pH 5.5): | 2.24 |
| ACD/BCF (pH 5.5): | 29.92 |
| ACD/KOC (pH 5.5): | 396.38 |
| ACD/LogD (pH 7.4): | 2.24 |
| ACD/BCF (pH 7.4): | 29.92 |
| ACD/KOC (pH 7.4): | 396.38 |
| Polar Surface Area: | 0 Å2 |
| Polarizability: | 8.0±0.5 10-24cm3 |
| Surface Tension: | 15.1±3.0 dyne/cm |
| Molar Volume: | 89.5±3.0 cm3 |
Predicted data is generated using the US Environmental Protection Agency’s EPISuite™
Log Octanol-Water Partition Coef (SRC): Log Kow (KOWWIN v1.67 estimate) = 2.23 Log Kow (Exper. database match) = 2.34 Exper. Ref: Hansch,C et al. (1995) Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42): Boiling Pt (deg C): 10.18 (Adapted Stein & Brown method) Melting Pt (deg C): -130.88 (Mean or Weighted MP) VP(mm Hg,25 deg C): 2.23E+003 (Mean VP of Antoine & Grain methods) MP (exp database): -140.4 deg C BP (exp database): -6.9 deg C VP (exp database): 2.31E+03 mm Hg at 25 deg C Water Solubility Estimate from Log Kow (WSKOW v1.41): Water Solubility at 25 deg C (mg/L): 399.2 log Kow used: 2.34 (expkow database) no-melting pt equation used Water Sol (Exper. database match) = 263 mg/L (25 deg C) Exper. Ref: YALKOWSKY,SH & DANNENFELSER,RM (1992) Water Sol Estimate from Fragments: Wat Sol (v1.01 est) = 456.87 mg/L Wat Sol (Exper. database match) = 263.00 Exper. Ref: YALKOWSKY,SH & DANNENFELSER,RM (1992) ECOSAR Class Program (ECOSAR v0.99h): Class(es) found: Neutral Organics Henrys Law Constant (25 deg C) [HENRYWIN v3.10]: Bond Method : 2.40E-001 atm-m3/mole Group Method: 2.34E-001 atm-m3/mole Exper Database: 2.18E-01 atm-m3/mole Henrys LC [VP/WSol estimate using EPI values]: 1.406E-001 atm-m3/mole Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]: Log Kow used: 2.34 (exp database) Log Kaw used: 0.950 (exp database) Log Koa (KOAWIN v1.10 estimate): 1.390 Log Koa (experimental database): None Probability of Rapid Biodegradation (BIOWIN v4.10): Biowin1 (Linear Model) : 0.7208 Biowin2 (Non-Linear Model) : 0.9013 Expert Survey Biodegradation Results: Biowin3 (Ultimate Survey Model): 3.0752 (weeks ) Biowin4 (Primary Survey Model) : 3.7668 (days ) MITI Biodegradation Probability: Biowin5 (MITI Linear Model) : 0.5584 Biowin6 (MITI Non-Linear Model): 0.7314 Anaerobic Biodegradation Probability: Biowin7 (Anaerobic Linear Model): 0.5299 Ready Biodegradability Prediction: YES Hydrocarbon Biodegradation (BioHCwin v1.01): LOG BioHC Half-Life (days) : 0.2827 BioHC Half-Life (days) : 1.9174 Sorption to aerosols (25 Dec C)[AEROWIN v1.00]: Vapor pressure (liquid/subcooled): 3.08E+005 Pa (2.31E+003 mm Hg) Log Koa (Koawin est ): 1.390 Kp (particle/gas partition coef. (m3/ug)): Mackay model : 9.74E-012 Octanol/air (Koa) model: 6.03E-012 Fraction sorbed to airborne particulates (phi): Junge-Pankow model : 3.52E-010 Mackay model : 7.79E-010 Octanol/air (Koa) model: 4.82E-010 Atmospheric Oxidation (25 deg C) [AopWin v1.92]: Hydroxyl Radicals Reaction: OVERALL OH Rate Constant = 51.6720 E-12 cm3/molecule-sec Half-Life = 0.207 Days (12-hr day; 1.5E6 OH/cm3) Half-Life = 2.484 Hrs Ozone Reaction: OVERALL Ozone Rate Constant = 1.200000 E-17 cm3/molecule-sec Half-Life = 0.955 Days (at 7E11 mol/cm3) Half-Life = 22.920 Hrs Fraction sorbed to airborne particulates (phi): 5.66E-010 (Junge,Mackay) Note: the sorbed fraction may be resistant to atmospheric oxidation Soil Adsorption Coefficient (PCKOCWIN v1.66): Koc : 35.04 Log Koc: 1.545 Aqueous Base/Acid-Catalyzed Hydrolysis (25 deg C) [HYDROWIN v1.67]: Rate constants can NOT be estimated for this structure! Bioaccumulation Estimates from Log Kow (BCFWIN v2.17): Log BCF from regression-based method = 1.102 (BCF = 12.64) log Kow used: 2.34 (expkow database) Volatilization from Water: Henry LC: 0.218 atm-m3/mole (Henry experimental database) Half-Life from Model River: 0.7664 hours (45.98 min) Half-Life from Model Lake : 71.17 hours (2.965 days) Removal In Wastewater Treatment (recommended maximum 95%): Total removal: 98.83 percent Total biodegradation: 0.02 percent Total sludge adsorption: 0.78 percent Total to Air: 98.03 percent (using 10000 hr Bio P,A,S) Level III Fugacity Model: Mass Amount Half-Life Emissions (percent) (hr) (kg/hr) Air 6.72 4.09 1000 Water 90.5 360 1000 Soil 2.33 720 1000 Sediment 0.493 3.24e+003 0 Persistence Time: 68 hr
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