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Ab initio calculations on the thermodynamic properties of azaborospiropentanes

Abstract

Following our recent studies of the thermodynamic properties of azaspiropentane and borospiropentane, in consideration of their usefulness as new potential high energy materials, we follow up with ab initio calculations on the thermodynamic properties of azaborospiropentanes. Properties reported in this study include optimized structural parameters, vibrational frequencies, enthalpies of formation, specific enthalpies of combustion, proton affinities, and hydride affinities. Our results indicate that azatriborospiropentane gives off most energy when combusted, as evidenced by its specific enthalpy of combustion of about −52 kJ per gram.

Optimized geometry for R-azatriborospiropentane (10)

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Scheme 1
Fig. 1

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Acknowledgments

R.M.R. wishes to express appreciation to the Honors Program at Cleveland State University for their continued support.

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Correspondence to David W. Ball.

Electronic supplementary material

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Table S1

Optimized structural parameters for 2-aza-3-borospiropentane. (bond lengths in Å, angles in degrees) (DOC 20 KB)

Table S2

Optimized structural parameters for 2-aza-4-borospiropentanes. (bond lengths in Å, all angles in degrees) (DOC 23 KB)

Table S3

Optimized structural parameters for 2,3-diaza-4-borospiropentanes. (bond lengths in Å, all angles in degrees) (DOC 21.5 KB)

Table S4

Optimized structural parameters for 2,4-diaza-3-borospiropentanes. (bond lengths in Å, all angles in degrees) (DOC 22.5 KB)

Table S5

Optimized structural parameters for R-2-aza-3,4-diborospiropentane. (bond lengths in Å, all angles in degrees) (DOC 22 KB)

Table S6

Optimized structural parameters for 2,3-diaza-4,5-diborospiropentane. (bond lengths in Å, all angles in degrees) (DOC 22 KB)

Table S7

Optimized structural parameters for 2,4-diaza-3,5-diborospiropentane. (bond lengths in Å, all angles in degrees) (DOC 20 KB)

Table S8

Optimized structural parameters for triazaborospiropentane. (bond lengths in Å, all angles in degrees) (DOC 21 KB)

Table S9

Optimized structural parameters for R-azatriborospiropentane. (bond lengths in Å, all angles in degrees) (DOC 21.5 KB)

Table S10

Vibrational frequencies, infrared intensities, and approximate descriptions for 2-aza-3-borospiropentane (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 21.5 KB)

Table S11

Vibrational frequencies, infrared intensities, and approximate descriptions for R-2-aza-4-boro-R-spiropentane (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 22 KB)

Table S12

Vibrational frequencies, infrared intensities, and approximate descriptions for R-2-aza-4-boro-S-spiropentane (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 22 KB)

Table S13

Vibrational frequencies, infrared intensities, and approximate descriptions for R,R-2,3-diaza-4-borospiropentane (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 20.5 KB)

Table S14

Vibrational frequencies, infrared intensities, and approximate descriptions for R,S-1,2-diaza-4-borospiropentane 1 (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 21 KB)

Table S15

Vibrational frequencies, infrared intensities, and approximate descriptions for R,S-1,2-diaza-4-borospiropentane-2 (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 20.5 KB)

Table S16

Vibrational frequencies, infrared intensities, and approximate descriptions for R -2,4-diaza-3-borospiropentane-1 (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 21 KB)

Table S17

Vibrational frequencies, infrared intensities, and approximate descriptions for R-2,4-diaza-3-borospiropentane-2 (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 21 KB)

Table S18

Vibrational frequencies, infrared intensities, and approximate descriptions for R -2-aza-3,4-diborospiropentane (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 21.5 KB)

Table S19

Vibrational frequencies, infrared intensities, and approximate descriptions for 2,4-diaza-3,5-diborospiropentane (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 20.5 KB)

Table S20

Vibrational frequencies, infrared intensities, and approximate descriptions for R,R-2,3-diaza-4,5-diborospiropentane (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 20 KB)

Table S21

Vibrational frequencies, infrared intensities, and approximate descriptions for R,S-2,3-diaza-4,5-diborospiropentane (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 20 KB)

Table S22

Vibrational frequencies, infrared intensities, and approximate descriptions for R,R-2,3,4-triaza-5-borospiropentane (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 20.5 KB)

Table S23

Vibrational frequencies, infrared intensities, and approximate descriptions for R,S-2,3,4-triaza-5-borospiropentane-1 (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 20.5 KB)

Table S24

Vibrational frequencies, infrared intensities, and approximate descriptions for R,S-2,3,4-triaza-5-borospiropentane-2 (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 20.5 KB)

Table S25

Vibrational frequencies, infrared intensities, and approximate descriptions for R-azatriborospiropentane (vibrational frequencies in wavenumbers, infrared intensities in km mol−1) (DOC 20 KB)

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Richard, R.M., Ball, D.W. Ab initio calculations on the thermodynamic properties of azaborospiropentanes. J Mol Model 14, 871–878 (2008). https://doi.org/10.1007/s00894-008-0329-5

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  • DOI: https://doi.org/10.1007/s00894-008-0329-5

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