ChemSpider 2D Image | 2,5-Dimethyl-6,7-dihydro-5H-cyclopentapyrazine | C9H12N2

2,5-Dimethyl-6,7-dihydro-5H-cyclopentapyrazine

  • Molecular FormulaC9H12N2
  • Average mass148.205 Da
  • Monoisotopic mass148.100052 Da
  • ChemSpider ID462010

More details:






Validated by Experts, Validated by Users, Non-Validated, Removed by Users

2,5-Dimethyl-6,7-dihydro-5H-cyclopenta[b]pyrazin [German] [ACD/IUPAC Name]
2,5-Dimethyl-6,7-dihydro-5H-cyclopenta[b]pyrazine [ACD/IUPAC Name]
2,5-Diméthyl-6,7-dihydro-5H-cyclopenta[b]pyrazine [French] [ACD/IUPAC Name]
2,5-Dimethyl-6,7-dihydro-5H-cyclopentapyrazine
38917-61-2 [RN]
5H-Cyclopenta[b]pyrazine, 6,7-dihydro-2,5-dimethyl- [ACD/Index Name]
5H-Cyclopentapyrazine, 6,7-dihydro-2,5-dimethyl-
6,7-Dihydro-2,5-dimethyl-5H-cyclopentapyrazine
T56 FN INT&J B1 G1 [WLN]
2,5-dimethyl-5H,6H,7H-cyclopenta[b]pyrazine
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  • Experimental Physico-chemical Properties
  • Gas Chromatography
    • Retention Index (Kovats):

      1208 (estimated with error: 83) NIST Spectra mainlib_249439
    • Retention Index (Normal Alkane):

      1225 (Program type: Ramp; Column cl... (show more) ass: Semi-standard non-polar; Column diameter: 0.32 mm; Column length: 50 m; Column type: Capillary; Heat rate: 2 K/min; Start T: 35 C; End T: 250 C; End time: 45 min; Start time: 15 min; CAS no: 38917612; Active phase: HP-5; Phase thickness: 0.52 um; Data type: Normal alkane RI; Authors: Boylston, T.D.; Viniyard, B.T., Isolation of volatile flavor compounds from peanut butter using purge-and-trap technique, in Instrumental Methods in Food and Beverage Analysis, D. Wetzel and G. Charalambous, ed(s), 1998, 225-243.) NIST Spectra nist ri
      1672 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column diameter: 0.28 mm; Column length: 50 m; Column type: Capillary; Heat rate: 2 K/min; Start T: 60 C; End T: 240 C; Start time: 5 min; CAS no: 38917612; Active phase: FFAP; Carrier gas: He; Data type: Normal alkane RI; Authors: Vernin, G.; Metzger, J.; Obretenov, T.; Suon, K.-N.; Fraisse, D., GC/MS (EI,PCI,SIM)-data bank analysis of volatile compounds arising from thermal degradation of glucose-valine amadori intermediates, in Flavors and Fragrances: A World Perspective. Proceedings of the 10th International Congress of Essential Oils, Fragrances and Flavors, Lawrence,B.M.; Mookherjee,B.D.; Willis,B.J., ed(s), Elsevier, New York, 1988, 999-1028.) NIST Spectra nist ri
      1673.7 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column diameter: 0.03 in; Column length: 1000 ft; Column type: Capillary; Heat rate: 4 K/min; Start T: 80 C; End T: 225 C; Start time: 5 min; CAS no: 38917612; Active phase: Carbowax 20M; Data type: Normal alkane RI; Authors: Mussinan, C.J.; Walradt, J.P., Volatile constituents of pressure cooked pork liver, J. Agric. Food Chem., 22(5), 1974, 827-831.) NIST Spectra nist ri
      1672.8 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column diameter: 0.03 in; Column length: 1000 ft; Column type: Capillary; Heat rate: 2 K/min; Start T: 100 C; End T: 225 C; CAS no: 38917612; Active phase: Carbowax 20M; Carrier gas: He; Data type: Normal alkane RI; Authors: Mussinan, C.J.; Wilson, R.A.; Katz, I., Isolation and identification of pyrazines present in pressure-cooked beef, J. Agric. Food Chem., 21(5), 1973, 871-872.) NIST Spectra nist ri
      1656.3 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column diameter: 0.03 in; Column length: 500 ft; Column type: Capillary; Heat rate: 2 K/min; Start T: 60 C; End T: 190 C; Start time: 2 min; CAS no: 38917612; Active phase: Carbowax 20M; Carrier gas: He; Data type: Normal alkane RI; Authors: Kinlin, T.E.; Muralidhara, R.; Pittet, A.O.; Sanderson, A.; Walradt, J.P., Volatile components of roasted filberts, J. Agric. Food Chem., 20(5), 1972, 1021-1028.) NIST Spectra nist ri
    • Retention Index (Linear):

      1194 (Program type: Ramp; Column cl... (show more) ass: Standard non-polar; Column diameter: 0.32 mm; Column length: 60 m; Column type: Capillary; Heat rate: 2 K/min; Start T: 40 C; End T: 220 C; Start time: 5 min; CAS no: 38917612; Active phase: DB-1; Carrier gas: He; Phase thickness: 1 um; Data type: Linear RI; Authors: Kim, J.S., Einfluss der Temperatur beim Rosten von Sesam auf Aroma und antioxidative Eigenschaften des Ols, PhD Thesis, Technischen Universitat Berlin zur Erlangung des akademischen Grades, Berlin, 2001, 151.) NIST Spectra nist ri
      1220 (Program type: Ramp; Column cl... (show more) ass: Semi-standard non-polar; Column diameter: 0.32 mm; Column length: 50 m; Column type: Capillary; Heat rate: 4 K/min; Start T: 60 C; End T: 250 C; End time: 10 min; Start time: 5 min; CAS no: 38917612; Active phase: BPX-5; Carrier gas: He; Phase thickness: 0.25 um; Data type: Linear RI; Authors: Ames, J.M.; Guy, R.C.E.; Kipping, G.J., Effect of pH, temperature, and moisture on the formation of volatile compounds in glycine/glucose model systems, J. Agric. Food Chem., 49, 2001, 4315-4323.) NIST Spectra nist ri
      1243 (Program type: Ramp; Column cl... (show more) ass: Semi-standard non-polar; Column diameter: 0.32 mm; Column length: 50 m; Column type: Capillary; Heat rate: 4 K/min; Start T: 60 C; End T: 250 C; End time: 10 min; Start time: 5 min; CAS no: 38917612; Active phase: BPX-5; Carrier gas: He; Phase thickness: 0.25 um; Data type: Linear RI; Authors: Ames, J.M.; Guy, R.C.E.; Kipping, G.J., Effect of pH, temperature, and moisture on the formation of volatile compounds in glycine/glucose model systems, J. Agric. Food Chem., 49, 2001, 4315-4323.) NIST Spectra nist ri

Predicted data is generated using the ACD/Labs Percepta Platform - PhysChem Module

Density: 1.0±0.1 g/cm3
Boiling Point: 222.1±35.0 °C at 760 mmHg
Vapour Pressure: 0.2±0.4 mmHg at 25°C
Enthalpy of Vaporization: 44.0±3.0 kJ/mol
Flash Point: 82.9±17.6 °C
Index of Refraction: 1.537
Molar Refractivity: 44.1±0.3 cm3
#H bond acceptors: 2
#H bond donors: 0
#Freely Rotating Bonds: 0
#Rule of 5 Violations: 0
ACD/LogP: 1.79
ACD/LogD (pH 5.5): 1.88
ACD/BCF (pH 5.5): 15.71
ACD/KOC (pH 5.5): 249.79
ACD/LogD (pH 7.4): 1.88
ACD/BCF (pH 7.4): 15.73
ACD/KOC (pH 7.4): 250.21
Polar Surface Area: 26 Å2
Polarizability: 17.5±0.5 10-24cm3
Surface Tension: 41.6±3.0 dyne/cm
Molar Volume: 141.2±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) =  2.38

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  231.57  (Adapted Stein & Brown method)
    Melting Pt (deg C):  48.79  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  0.0412  (Modified Grain method)
    Subcooled liquid VP: 0.0681 mm Hg (25 deg C, Mod-Grain method)

 Water Solubility Estimate from Log Kow (WSKOW v1.41):
    Water Solubility at 25 deg C (mg/L):  719
       log Kow used: 2.38 (estimated)
       no-melting pt equation used

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  3607.2 mg/L

 ECOSAR Class Program (ECOSAR v0.99h):
    Class(es) found:
       Neutral Organics

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   3.05E-006  atm-m3/mole
   Group Method:   4.77E-009  atm-m3/mole
 Henrys LC [VP/WSol estimate using EPI values]:  1.117E-005 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  2.38  (KowWin est)
  Log Kaw used:  -3.904  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  6.284
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.8410
   Biowin2 (Non-Linear Model)     :   0.9331
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   2.6471  (weeks-months)
   Biowin4 (Primary Survey Model) :   3.4283  (days-weeks  )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.2756
   Biowin6 (MITI Non-Linear Model):   0.2826
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model): -0.0339
 Ready Biodegradability Prediction:   NO

Hydrocarbon Biodegradation (BioHCwin v1.01):
    Structure incompatible with current estimation method!

 Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:
  Vapor pressure (liquid/subcooled):  9.08 Pa (0.0681 mm Hg)
  Log Koa (Koawin est  ): 6.284
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  3.3E-007 
       Octanol/air (Koa) model:  4.72E-007 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  1.19E-005 
       Mackay model           :  2.64E-005 
       Octanol/air (Koa) model:  3.78E-005 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =   5.2655 E-12 cm3/molecule-sec
      Half-Life =     2.031 Days (12-hr day; 1.5E6 OH/cm3)
      Half-Life =    24.376 Hrs
   Ozone Reaction:
      No Ozone Reaction Estimation
   Fraction sorbed to airborne particulates (phi): 1.92E-005 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  289.1
      Log Koc:  2.461 

 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 = 1.131 (BCF = 13.53)
       log Kow used: 2.38 (estimated)

 Volatilization from Water:
    Henry LC:  3.05E-006 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River:      234.9  hours   (9.789 days)
    Half-Life from Model Lake :       2665  hours   (111 days)

 Removal In Wastewater Treatment:
    Total removal:               2.96  percent
    Total biodegradation:        0.10  percent
    Total sludge adsorption:     2.69  percent
    Total to Air:                0.17  percent
      (using 10000 hr Bio P,A,S)

 Level III Fugacity Model:
           Mass Amount    Half-Life    Emissions
            (percent)        (hr)       (kg/hr)
   Air       1.5             48.7         1000       
   Water     24.3            900          1000       
   Soil      74              1.8e+003     1000       
   Sediment  0.161           8.1e+003     0          
     Persistence Time: 927 hr




                    

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