Lithium monoxide anion

Lithium monoxide anion
Names
	IUPAC name Lithium monoxide anion
	Other names Lithate
Identifiers
CAS Number	64538-53-0;
3D model (JSmol)	Interactive image;
CompTox Dashboard (EPA)	DTXSID901337186 ;
	InChI InChI=1S/Li.O/q;-1 Key: IXZJKKSRIFXCQD-UHFFFAOYSA-N;
	SMILES [Li]-[O-];
Properties
Chemical formula	LiO−
Molar mass	22.94 g·mol−1
Conjugate acid	Lithium hydroxide
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Extremely corrosive
Related compounds
Related bases	Methyl anion; Diethynylbenzene dianions; ;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Lithium monoxide anion (LiO⁻) is a superbase existing in the gas phase. It was the strongest known base until 2008, when the isomeric diethynylbenzene dianions were determined to have a higher proton affinity. The methanide ion CH−3 was the strongest known base before lithium monoxide anion was discovered.^[2]

LiO⁻ has a proton affinity of ~1782 kJ/mol.^[3]

^ "Lithium oxide anion". webbook.nist.gov.
^ Poad, Berwyck L. J.; Reed, Nicholas D.; Hansen, Christopher S.; Trevitt, Adam J.; Blanksby, Stephen J.; Mackay, Emily G.; Sherburn, Michael S.; Chan, Bun; Radom, Leo (2016). "Preparation of an ion with the highest calculated proton affinity: ortho-diethynylbenzene dianion". Chemical Science. 7 (9): 6245–6250. doi:10.1039/C6SC01726F. PMC 6024202. PMID 30034765.
^ Srivastava, Ambrish Kumar; Misra, Neeraj (6 February 2016). "OLi₃O^– anion: Designing the strongest base to date using OLi₃ superalkali". Chemical Physics Letters. 648: 152–155. Bibcode:2016CPL...648..152S. doi:10.1016/j.cplett.2016.02.010.

[1] "Lithium oxide anion". webbook.nist.gov.

[2] Poad, Berwyck L. J.; Reed, Nicholas D.; Hansen, Christopher S.; Trevitt, Adam J.; Blanksby, Stephen J.; Mackay, Emily G.; Sherburn, Michael S.; Chan, Bun; Radom, Leo (2016). "Preparation of an ion with the highest calculated proton affinity: ortho-diethynylbenzene dianion". Chemical Science. 7 (9): 6245–6250. doi:10.1039/C6SC01726F. PMC 6024202. PMID 30034765.

[3] Srivastava, Ambrish Kumar; Misra, Neeraj (6 February 2016). "OLi₃O^– anion: Designing the strongest base to date using OLi₃ superalkali". Chemical Physics Letters. 648: 152–155. Bibcode:2016CPL...648..152S. doi:10.1016/j.cplett.2016.02.010.

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