Tungsten Iodide (III)

• The reaction of hexacarbonyl tungsten and iodine:

${\displaystyle \mathsf{2}\mathsf{W}\mathsf{(}\mathsf{C}\mathsf{O}{\mathsf{)}}_{\mathsf{6}}\mathsf{+}\mathsf{3}{\mathsf{I}}_{\mathsf{2}}\stackrel{{\mathsf{120}}^{\mathsf{o}}\mathsf{C}}{\to }\mathsf{2}\mathsf{W}{\mathsf{I}}_{\mathsf{3}}\mathsf{+}\mathsf{12}\mathsf{C}\mathsf{O}\uparrow }${\ displaystyle {\ mathsf {2W (CO) _ {6} + 3I_ {2} \ {\ xrightarrow {120 ^ {o} C}} \ 2WI_ {3} + 12CO \ uparrow}}}  

• There is evidence of the production of tungsten iodide of similar composition W ₁₅ I ₄₇ ^[1] .

Tungsten (III) iodide forms black crystals that slowly lose iodine in air.

It is not soluble in benzene and chloroform , soluble in acetone and nitrobenzene .

• When stored in air, it slowly loses iodine:

${\displaystyle \mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">2</span></span>}\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">W</span></span>}{\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">I</span></span>}}_{\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">3</span></span>}}\stackrel{}{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">\to </span></span>}\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">2</span></span>}\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">W</span></span>}{\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">I</span></span>}}_{\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">2</span></span>}}\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">+</span></span>}{\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">I</span></span>}}_{\mathsf{<span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">2</span></span>}}}${\ displaystyle {\ mathsf {2WI_ {3} \ {\ xrightarrow {}} \ 2WI_ {2} + I_ {2}}}}  

• Greenwood N., Earnshaw A. Chemistry of elements. - Binom. Laboratory of knowledge, 2008. - T. 2. - 666 p. - ISBN 978-5-94774-372-2 .
• Inorganic Synthesis Guide: 6 Vol. / Ed. Brower, G. - Moscow : Mir, 1985 .-- V. 5 .-- 360 p.