| 释义 |
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This page provides supplementary chemical data on boron trioxide. == Material Safety Data Sheet == == Structure and properties == | Structure and properties | | Index of refraction, nD | ? | | Abbe number | ? | | Dielectric constant, εr | ? ε0 at ? °C | | Bond strength | ? | | Bond length | ? | | Bond angle | ? | | Magnetic susceptibility | ? | |
== Thermodynamic properties == | Phase behavior | | Triple point | ? K (? °C), ? Pa | | Critical point | ? K (? °C), ? Pa | Std enthalpy change
of fusion, ΔfusHo | ? kJ/mol | Std entropy change
of fusion, ΔfusSo | ? J/(mol·K) | Std enthalpy change
of vaporization, ΔvapHo | ? kJ/mol | Std entropy change
of vaporization, ΔvapSo | ? J/(mol·K) | | Solid properties |
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Std enthalpy change
of formation, ΔfHosolid | -1273.5 kJ/mol | Standard molar entropy,
Sosolid | 54.0 J/(mol K) | | Heat capacity, cp | 62.8 J/(mol K) | | Liquid properties |
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Std enthalpy change
of formation, ΔfHoliquid | ? kJ/mol | Standard molar entropy,
Soliquid | ? J/(mol K) | | Heat capacity, cp | ? J/(mol K) | | Gas properties |
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Std enthalpy change
of formation, ΔfHogas | -843.8 kJ/mol | Standard molar entropy,
Sogas | 242.5 J/(mol K) | | Heat capacity, cp | 57.3 J/(mol K) | |
== Spectral data == | UV-Vis | | λmax | ? nm | | Extinction coefficient, ε | ? | | IR |
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| Major absorption bands | ? cm−1 | | NMR |
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| Proton NMR | | | Carbon-13 NMR | | | Other NMR data | | | MS |
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Masses of
main fragments | | |
References Except where noted otherwise, data relate to standard ambient temperature and pressure. Disclaimer applies. 1 : Chemical data pages |