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Pyridine (data page)

From Wikipedia, the free encyclopedia
Chemical data page

This page provides supplementary chemical data onpyridine.

Material Safety Data Sheet

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The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source such aseChemPortal, and follow its directions. MSDS is available fromSigma - Aldrich.

Structure and properties

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Structure and properties
Index of refraction,nD1.509 at 20 °C
Abbe number?
Dielectric constant, εr12.3 ε0 at 25 °C
Bond strength?
Bond length?
Bond angle?
Magnetic susceptibility?
Surface tension[1]40.8 dyn/cm at 0 °C
38.0 dyn/cm at 20 °C
26.4 dyn/cm at 100 °C
Viscosity[2]0.974 mPa·s at 20 °C

Thermodynamic properties

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Phase behavior
Triple point231.48 K (–41.67 °C), ? Pa
Critical point619 K (346 °C), 5660 Pa
Std enthalpy change
of fusion, ΔfusHo		8.28 kJ/mol
Std entropy change
of fusion, ΔfusSo		35.8 J/(mol·K)
Std enthalpy change
of vaporization, ΔvapHo		40.2 kJ/mol
Std entropy change
of vaporization, ΔvapSo		? J/(mol·K)
Solid properties
Std enthalpy change
of formation, ΔfHosolid		? kJ/mol
Standard molar entropy,
Sosolid		? J/(mol K)
Heat capacity,cp? J/(mol K)
Liquid properties
Std enthalpy change
of formation, ΔfHoliquid		100 kJ/mol
Standard molar entropy,
Soliquid		177 J/(mol K)
Enthalpy of combustion, ΔcHo–2782 kJ/mol
Heat capacity,cp132.72 J/(mol K)
Gas properties
Std enthalpy change
of formation, ΔfHogas		140 kJ/mol at 25 °C
Standard molar entropy,
Sogas		? J/(mol K) at 25 °C
Heat capacity,cp[3]157.8 J/(mol K) at 25 °C

Vapor pressure of liquid

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P in mm Hg11040100400760
T in °C–18.913.238.057.895.6115.4

Table data obtained fromCRC Handbook of Chemistry and Physics 44th ed.

log10 of Pyridine vapor pressure. Uses formula:loge⁡PmmHg={\displaystyle \scriptstyle \log _{e}P_{mmHg}=}loge⁡(760101.325)−8.907666loge⁡(T+273.15)−7221.386T+273.15+75.52152+5.304278×10−06(T+273.15)2{\displaystyle \scriptstyle \log _{e}({\frac {760}{101.325}})-8.907666\log _{e}(T+273.15)-{\frac {7221.386}{T+273.15}}+75.52152+5.304278\times 10^{-06}(T+273.15)^{2}} obtained from CHERIC[3]

Spectral data

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UV-Vis
λmax?nm
Extinction coefficient, ε?
IR
Major absorption bands? cm−1
NMR
Proton NMR 
Carbon-13 NMR 
Other NMR data 
MS
Masses of
main fragments		 
  This box:  

References

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  1. ^Lange's Handbook of Chemistry, 10th ed. pp 1661-1663
  2. ^CRC Handbook of Chemistry and Physics, 44th ed. pp 2258-2263
  3. ^ab"Pure Component Properties"(Queriable database). Chemical Engineering Research Information Center. Retrieved20 May 2007.


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