Pentazolate

In chemistry, a pentazolate is a compound that contains a cyclo–N−5 ion, the anion of pentazole. In 2017, researchers prepared the first salt (N5)6(H3O)3(NH4)4Cl containing pentazolate anion starting a substituted phenylpentazole, m-CPBA and iron(II) glycinate. A series of metal and nonmetal pentazolates were subsequently synthesized according to their work.

Pentazolate

Identifiers
CAS Number	86840-63-3 Y
3D model (JSmol)	Interactive image
PubChem CID	59450521
InChI InChI=1S/N5/c1-2-4-5-3-1/q-1 Key: DAHQTMWHOQRXRN-UHFFFAOYSA-N
SMILES N1=NN=N[N-]1
Properties
Chemical formula	N−5
Conjugate acid	Pentazole
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chemical compound

In chemistry, a pentazolate is a compound that contains a cyclo–N−5 ion, the anion of pentazole. In 2017, researchers prepared the first salt (N₅)₆(H₃O)₃(NH₄)₄Cl containing pentazolate anion starting a substituted phenylpentazole, m-CPBA and iron(II) glycinate.^[1] A series of metal and nonmetal pentazolates were subsequently synthesized according to their work.

List of pentazolates

[edit]

	Appearance	Dec. temp (°C)	Ref
LiN5	white	133	[2]
LiN5·3H2O	colorless	139	[2]
[Na(N5)(H2O)]·2H2O	colorless	111.3	[3]
[Mg(N5)2(H2O)6]·4H2O	colorless	103.5	[3]
[Al(N5)3(H2O)6]·9H2O	white	141.4	[4]
[Mn(N5)2(H2O)4]·4H2O	colorless	104.1	[3]
[Fe(N5)2(H2O)4]·4H2O	pale green	114.7	[3]
[Fe(N5)3(H2O)6]·9H2O	reddish brown	108.9	[4]
[Co(N5)2(H2O)4]·4H2O	bright orange	58.9	[3]
AgN5	pale white	120	[5]
[Pb4(OH)4]4(N5)4	colorless	80	[6]
[N(CH3)4]N5	white	80.8	[7]
(NH3OH)N5	white	104.3	[7]
[C(NH2)3]N5	white	88.1	[7]
NH4N5	white	102.0	[7]
N2H5N5	white	85.3	[7]
(CN7H6)N5		96.3	[8]

References

[edit]

1. ^ Zhang, C., Sun, C., Hu, B., Yu, C., & Lu, M. (2017). Synthesis and characterization of the pentazolate anion cyclo-N₅⁻ in (N₅)₆(H₃O)₃(NH₄)₄Cl. Science, 355(6323), 374–376. doi:10.1126/science.aah3840
2. ^ ^{a b} Xu, Y., Ding, L., Yang, F., Li, D., Wang, P., Lin, Q., & Lu, M. (2022). LiN₅: A novel pentazolate salt with high nitrogen content. Chemical Engineering Journal, 429, 132399.
3. ^ ^{a b c d e} Xu, Y., Wang, Q., Shen, C. et al. A series of energetic metal pentazolate hydrates. Nature 549, 78–81 (2017). doi:10.1038/nature23662
4. ^ ^{a b} Chen, L., Yang, C., Hu, H., Shi, L., Zhang, C., Sun, C., ... & Hu, B. (2022). Iron(III) and aluminum(III) complexes of cyclopentazolate anions. CrystEngComm. doi:10.1039/D2CE01270G
5. ^ Sun, C., Zhang, C., Jiang, C., Yang, C., Du, Y., Zhao, Y., Hu. B., Zheng. Z., Christe, K. O. (2018). Synthesis of AgN5 and its extended 3D energetic framework. Nature Communications, 9(1). doi:10.1038/s41467-018-03678-y
6. ^ Yuan, Y., Xu, Y., Xie, Q., Li, D., Lin, Q., Wang, P., & Lu, M. (2022). Pentazolate coordination polymers self-assembled by in situ generated [Pb₄(OH)₄]⁴⁺ cubic cations trapping cyclo-N₅^–. Dalton Transactions, 51(15), 5801-5809.
7. ^ ^{a b c d e} Yang, C., Zhang, C., Zheng, Z., Jiang, C., Luo, J., Du, Y., Hu. B., Sun. C., Christe, K. O. (2018). Synthesis and Characterization of cyclo-Pentazolate Salts of NH₄⁺, NH₃OH⁺, N₂H₅+, C(NH₂)₃⁺, and N(CH₃)₄⁺. Journal of the American Chemical Society. doi:10.1021/jacs.8b05106
8. ^ Yu, R. J., Liu, Y. J., Huang, W., & Tang, Y. X. (2022). A hybrid of tetrazolium and pentazolate: An energetic salt with ultrahigh nitrogen content and energy. Energetic Materials Frontiers. doi:10.1016/j.enmf.2022.05.002

See also

[edit]

• Azide (N₃⁻)
• Diazenide (N₂²⁻)
• Nitride (N³⁻)