Niobium pentaiodide

Niobium pentaiodide
Names
	Other names Niobium(V) iodide
Identifiers
CAS Number	13779-92-5;
3D model (JSmol)	Interactive image;
ChemSpider	75550;
ECHA InfoCard	100.034.006
EC Number	237-422-1;
PubChem CID	83728;
CompTox Dashboard (EPA)	DTXSID1065633;
	InChI InChI=1S/5HI.Nb/h5*1H;/q;;;;;+5/p-5 Key: FWIYBTVHGYLSAZ-UHFFFAOYSA-I;
	SMILES [Nb](I)(I)(I)(I)I;
Properties
Chemical formula	Nb2I10
Molar mass	1475
Appearance	yellow solid
Density	5.30 g/cm3
Melting point	543 °C (1,009 °F; 816 K) sublimes
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H314
Precautionary statements	P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Niobium pentaiodide is the inorganic compound with the formula Nb₂I₁₀. It is a yellow, moisture-sensitive, diamagnetic solid. It forms upon heating metallic niobium with iodine.^[1] Its structure has been verified by single crystal X-ray diffraction, which reveals an edge-shared bioctahedral structure, as observed for many pentahalides of Nb and Ta. The bonds to the bridging iodides are 0.3 Å longer than the terminal Nb-I bonds.^[2]

References

^ G. Brauer "Hydrogen, Deuterium, Water" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 2. p. 1315.
^ Krebs, Bernt; Sinram, Diethard "Darstellung, Struktur und Eigenschaften einer neuen Modifikation von NbI₅ (Preparation, structure and properties of a new modification of NbI₅" Zeitschrift fǔr Naturforschung, Teil B: Anorganische Chemie, Organische Chemie 1980, volume 35b, pp. 12-16.

[1] G. Brauer "Hydrogen, Deuterium, Water" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 2. p. 1315.

[2] Krebs, Bernt; Sinram, Diethard "Darstellung, Struktur und Eigenschaften einer neuen Modifikation von NbI₅ (Preparation, structure and properties of a new modification of NbI₅" Zeitschrift fǔr Naturforschung, Teil B: Anorganische Chemie, Organische Chemie 1980, volume 35b, pp. 12-16.

[1]

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