Diisopropyl methanephosphonate

Formula: C₇H₁₇O₃P
Molecular weight: 180.1818
IUPAC Standard InChI: InChI=1S/C7H17O3P/c1-6(2)9-11(5,8)10-7(3)4/h6-7H,1-5H3
IUPAC Standard InChIKey: WOAFDHWYKSOANX-UHFFFAOYSA-N
CAS Registry Number: 1445-75-6
Chemical structure:
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Other names: DIMP; Phosphonic acid, methyl-, bis(1-methylethyl) ester; Diisopropyl methylphosphonate; Phosphonic acid, methyl-, diisopropyl ester; Dimp (phosphonate); O,O-Diisopropyl methylphosphonate; Phosphonic acid, methyl-, O,O-bis-isopropyl ester; Methyl-phosphonic acid diisopropyl ester; bis(1-methylethyl) methylphosphonate
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Phase change data

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Data compiled as indicated in comments:
AC - William E. Acree, Jr., James S. Chickos

Quantity	Value	Units	Method	Reference	Comment
Δ_vapH°	13.8	kcal/mol	GS	Butrow, Buchanan, et al., 2009	Based on data from 253. to 468. K.; AC

Enthalpy of vaporization

Δ_vapH (kcal/mol)	Temperature (K)	Method	Reference	Comment
14.8	253.	GS	Butrow, Buchanan, et al., 2009	Based on data from 253. to 468. K.; AC
14.1	283.	GS	Butrow, Buchanan, et al., 2009	Based on data from 253. to 468. K.; AC
13.5	313.	GS	Butrow, Buchanan, et al., 2009	Based on data from 253. to 468. K.; AC
13.0	353.	GS	Butrow, Buchanan, et al., 2009	Based on data from 253. to 468. K.; AC
12.5	393.	GS	Butrow, Buchanan, et al., 2009	Based on data from 253. to 468. K.; AC

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
P = vapor pressure (atm)
T = temperature (K)

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Temperature (K)	A	B	C	Reference	Comment
343. to 406.	0.1646	104.428	-304.50	Kosolapoff, 1955	Coefficents calculated by NIST from author's data.

References

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Butrow, Buchanan, et al., 2009
Butrow, Ann B.; Buchanan, James H.; Tevault, David E., Vapor Pressure of Organophosphorus Nerve Agent Simulant Compounds, J. Chem. Eng. Data, 2009, 54, 6, 1876-1883, https://doi.org/10.1021/je8010024 . [all data]

Kosolapoff, 1955
Kosolapoff, G.M., Vapour Pressures and Densities of Some Lower Alkylphosphonates, J. Chem. Soc., 1955, 2964-2965. [all data]

Notes

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Symbols used in this document:

Δ_vapH Enthalpy of vaporization

Δ_vapH° Enthalpy of vaporization at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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Δ_vapH	Enthalpy of vaporization
Δ_vapH°	Enthalpy of vaporization at standard conditions