<p><b>碘化亞鐵</b>是無機化合物，化學式為FeI<sub>2</sub>。</p>


<h2><span id=".E5.88.B6.E5.A4.87"></span><span id="制备">製備</span></h2>
<ul><li>直接用碘與鐵反應：</li></ul><dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\mathsf {Fe+I_{2}\ {\xrightarrow {}}\ FeI_{2}}}}">
  <semantics>
    <mrow class="MJX-TeXAtom-ORD">
      <mstyle displaystyle="true" scriptlevel="0">
        <mrow class="MJX-TeXAtom-ORD">
          <mrow class="MJX-TeXAtom-ORD">
            <mi mathvariant="sans-serif">F</mi>
            <mi mathvariant="sans-serif">e</mi>
            <mo mathvariant="sans-serif">+</mo>
            <msub>
              <mi mathvariant="sans-serif">I</mi>
              <mrow class="MJX-TeXAtom-ORD">
                <mn mathvariant="sans-serif">2</mn>
              </mrow>
            </msub>
            <mtext mathvariant="sans-serif"> </mtext>
            <mrow class="MJX-TeXAtom-ORD">
              <mover>
                <mo>→</mo>
                <mpadded width="+0.611em" lspace="0.278em" voffset=".15em"></mpadded>
              </mover>
            </mrow>
            <mtext mathvariant="sans-serif"> </mtext>
            <mi mathvariant="sans-serif">F</mi>
            <mi mathvariant="sans-serif">e</mi>
            <msub>
              <mi mathvariant="sans-serif">I</mi>
              <mrow class="MJX-TeXAtom-ORD">
                <mn mathvariant="sans-serif">2</mn>
              </mrow>
            </msub>
          </mrow>
        </mrow>
      </mstyle>
    </mrow>
    <annotation encoding="application/x-tex">{\displaystyle {\mathsf {Fe+I_{2}\ {\xrightarrow {}}\ FeI_{2}}}}</annotation>
  </semantics></math></span></span></dd></dl><ul><li>加熱碘與硫化鐵：</li></ul><dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\mathsf {FeS+I_{2}\ {\xrightarrow {T}}\ FeI_{2}+S}}}">
  <semantics>
    <mrow class="MJX-TeXAtom-ORD">
      <mstyle displaystyle="true" scriptlevel="0">
        <mrow class="MJX-TeXAtom-ORD">
          <mrow class="MJX-TeXAtom-ORD">
            <mi mathvariant="sans-serif">F</mi>
            <mi mathvariant="sans-serif">e</mi>
            <mi mathvariant="sans-serif">S</mi>
            <mo mathvariant="sans-serif">+</mo>
            <msub>
              <mi mathvariant="sans-serif">I</mi>
              <mrow class="MJX-TeXAtom-ORD">
                <mn mathvariant="sans-serif">2</mn>
              </mrow>
            </msub>
            <mtext mathvariant="sans-serif"> </mtext>
            <mrow class="MJX-TeXAtom-ORD">
              <mover>
                <mo>→</mo>
                <mpadded width="+0.611em" lspace="0.278em" voffset=".15em">
                  <mi mathvariant="sans-serif">T</mi>
                </mpadded>
              </mover>
            </mrow>
            <mtext mathvariant="sans-serif"> </mtext>
            <mi mathvariant="sans-serif">F</mi>
            <mi mathvariant="sans-serif">e</mi>
            <msub>
              <mi mathvariant="sans-serif">I</mi>
              <mrow class="MJX-TeXAtom-ORD">
                <mn mathvariant="sans-serif">2</mn>
              </mrow>
            </msub>
            <mo mathvariant="sans-serif">+</mo>
            <mi mathvariant="sans-serif">S</mi>
          </mrow>
        </mrow>
      </mstyle>
    </mrow>
    <annotation encoding="application/x-tex">{\displaystyle {\mathsf {FeS+I_{2}\ {\xrightarrow {T}}\ FeI_{2}+S}}}</annotation>
  </semantics></math></span></span></dd></dl><ul><li>加熱分解Fe(CO)<sub>4</sub>I<sub>2</sub>：</li></ul><dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\mathsf {Fe(CO)_{4}I_{2}\ {\xrightarrow {T}}\ FeI_{2}+2CO}}}">
  <semantics>
    <mrow class="MJX-TeXAtom-ORD">
      <mstyle displaystyle="true" scriptlevel="0">
        <mrow class="MJX-TeXAtom-ORD">
          <mrow class="MJX-TeXAtom-ORD">
            <mi mathvariant="sans-serif">F</mi>
            <mi mathvariant="sans-serif">e</mi>
            <mo mathvariant="sans-serif" stretchy="false">(</mo>
            <mi mathvariant="sans-serif">C</mi>
            <mi mathvariant="sans-serif">O</mi>
            <msub>
              <mo mathvariant="sans-serif" stretchy="false">)</mo>
              <mrow class="MJX-TeXAtom-ORD">
                <mn mathvariant="sans-serif">4</mn>
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            </msub>
            <msub>
              <mi mathvariant="sans-serif">I</mi>
              <mrow class="MJX-TeXAtom-ORD">
                <mn mathvariant="sans-serif">2</mn>
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            </msub>
            <mtext mathvariant="sans-serif"> </mtext>
            <mrow class="MJX-TeXAtom-ORD">
              <mover>
                <mo>→</mo>
                <mpadded width="+0.611em" lspace="0.278em" voffset=".15em">
                  <mi mathvariant="sans-serif">T</mi>
                </mpadded>
              </mover>
            </mrow>
            <mtext mathvariant="sans-serif"> </mtext>
            <mi mathvariant="sans-serif">F</mi>
            <mi mathvariant="sans-serif">e</mi>
            <msub>
              <mi mathvariant="sans-serif">I</mi>
              <mrow class="MJX-TeXAtom-ORD">
                <mn mathvariant="sans-serif">2</mn>
              </mrow>
            </msub>
            <mo mathvariant="sans-serif">+</mo>
            <mn mathvariant="sans-serif">2</mn>
            <mi mathvariant="sans-serif">C</mi>
            <mi mathvariant="sans-serif">O</mi>
          </mrow>
        </mrow>
      </mstyle>
    </mrow>
    <annotation encoding="application/x-tex">{\displaystyle {\mathsf {Fe(CO)_{4}I_{2}\ {\xrightarrow {T}}\ FeI_{2}+2CO}}}</annotation>
  </semantics></math></span></span></dd></dl><h2><span id=".E7.89.A9.E7.90.86.E6.80.A7.E8.B4.A8"></span><span id="物理性质">物理性質</span></h2>
<p>紅棕色三方晶體，空間群<i><b>P <u style="text-decoration: overline;">3</u>m1</b></i>，其中<i>a</i> = 0,404 nm，<i>c</i> = 0,675 nm，Z = 1。
</p><p>易溶於水。
</p><p>可形成FeI<sub>2</sub>·<i>n</i> H<sub>2</sub>O，其中<i>n</i> = 2, 4, 6, 9。
</p>
<h2><span id=".E5.8C.96.E5.AD.A6.E6.80.A7.E8.B4.A8"></span><span id="化学性质">化學性質</span></h2>
<ul><li>在空氣中加熱時，被氧氣氧化：</li></ul><dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\mathsf {4FeI_{2}+3O_{2}\ {\xrightarrow {T}}\ 2Fe_{2}O_{3}+4I_{2}}}}">
  <semantics>
    <mrow class="MJX-TeXAtom-ORD">
      <mstyle displaystyle="true" scriptlevel="0">
        <mrow class="MJX-TeXAtom-ORD">
          <mrow class="MJX-TeXAtom-ORD">
            <mn mathvariant="sans-serif">4</mn>
            <mi mathvariant="sans-serif">F</mi>
            <mi mathvariant="sans-serif">e</mi>
            <msub>
              <mi mathvariant="sans-serif">I</mi>
              <mrow class="MJX-TeXAtom-ORD">
                <mn mathvariant="sans-serif">2</mn>
              </mrow>
            </msub>
            <mo mathvariant="sans-serif">+</mo>
            <mn mathvariant="sans-serif">3</mn>
            <msub>
              <mi mathvariant="sans-serif">O</mi>
              <mrow class="MJX-TeXAtom-ORD">
                <mn mathvariant="sans-serif">2</mn>
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            </msub>
            <mtext mathvariant="sans-serif"> </mtext>
            <mrow class="MJX-TeXAtom-ORD">
              <mover>
                <mo>→</mo>
                <mpadded width="+0.611em" lspace="0.278em" voffset=".15em">
                  <mi mathvariant="sans-serif">T</mi>
                </mpadded>
              </mover>
            </mrow>
            <mtext mathvariant="sans-serif"> </mtext>
            <mn mathvariant="sans-serif">2</mn>
            <mi mathvariant="sans-serif">F</mi>
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              <mi mathvariant="sans-serif">e</mi>
              <mrow class="MJX-TeXAtom-ORD">
                <mn mathvariant="sans-serif">2</mn>
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            <msub>
              <mi mathvariant="sans-serif">O</mi>
              <mrow class="MJX-TeXAtom-ORD">
                <mn mathvariant="sans-serif">3</mn>
              </mrow>
            </msub>
            <mo mathvariant="sans-serif">+</mo>
            <mn mathvariant="sans-serif">4</mn>
            <msub>
              <mi mathvariant="sans-serif">I</mi>
              <mrow class="MJX-TeXAtom-ORD">
                <mn mathvariant="sans-serif">2</mn>
              </mrow>
            </msub>
          </mrow>
        </mrow>
      </mstyle>
    </mrow>
    <annotation encoding="application/x-tex">{\displaystyle {\mathsf {4FeI_{2}+3O_{2}\ {\xrightarrow {T}}\ 2Fe_{2}O_{3}+4I_{2}}}}</annotation>
  </semantics></math></span></span></dd></dl><h2><span id=".E7.94.A8.E9.80.94"></span><span id="用途">用途</span></h2>
<p>在有機反應中作為催化劑使用。
</p>
<h2><span id=".E5.8F.82.E8.80.83.E6.96.87.E7.8C.AE"></span><span id="参考文献">參考文獻</span></h2>

<ul><li><cite class="citation book">Редкол.: Кнунянц И.Л. и др. (編). Химическая энциклопедия <b>2</b>. М.: Советская энциклопедия. 1990: 671. ISBN 5-82270-035-5.</cite><span title="ctx_ver=Z39.88-2004&amp;rfr_id=info%3Asid%2Fzh.wikipedia.org%3A%E7%A2%98%E5%8C%96%E4%BA%9A%E9%93%81&amp;rft.au=%D0%A0%D0%B5%D0%B4%D0%BA%D0%BE%D0%BB.%3A+%D0%9A%D0%BD%D1%83%D0%BD%D1%8F%D0%BD%D1%86+%D0%98.%D0%9B.+%D0%B8+%D0%B4%D1%80.&amp;rft.btitle=%D0%A5%D0%B8%D0%BC%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0%D1%8F+%D1%8D%D0%BD%D1%86%D0%B8%D0%BA%D0%BB%D0%BE%D0%BF%D0%B5%D0%B4%D0%B8%D1%8F&amp;rft.date=1990&amp;rft.genre=book&amp;rft.pages=671&amp;rft.place=%D0%9C.&amp;rft.pub=%D0%A1%D0%BE%D0%B2%D0%B5%D1%82%D1%81%D0%BA%D0%B0%D1%8F+%D1%8D%D0%BD%D1%86%D0%B8%D0%BA%D0%BB%D0%BE%D0%BF%D0%B5%D0%B4%D0%B8%D1%8F&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook"><span> </span></span></li>
<li><cite class="citation book">Редкол.: Никольский Б.П. и др. (編). Справочник химика <b>1</b> 2-е изд., испр. М.-Л.: Химия. 1966: 1072.</cite><span title="ctx_ver=Z39.88-2004&amp;rfr_id=info%3Asid%2Fzh.wikipedia.org%3A%E7%A2%98%E5%8C%96%E4%BA%9A%E9%93%81&amp;rft.au=%D0%A0%D0%B5%D0%B4%D0%BA%D0%BE%D0%BB.%3A+%D0%9D%D0%B8%D0%BA%D0%BE%D0%BB%D1%8C%D1%81%D0%BA%D0%B8%D0%B9+%D0%91.%D0%9F.+%D0%B8+%D0%B4%D1%80.&amp;rft.btitle=%D0%A1%D0%BF%D1%80%D0%B0%D0%B2%D0%BE%D1%87%D0%BD%D0%B8%D0%BA+%D1%85%D0%B8%D0%BC%D0%B8%D0%BA%D0%B0&amp;rft.date=1966&amp;rft.edition=2-%D0%B5+%D0%B8%D0%B7%D0%B4.%2C+%D0%B8%D1%81%D0%BF%D1%80&amp;rft.genre=book&amp;rft.pages=1072&amp;rft.place=%D0%9C.-%D0%9B.&amp;rft.pub=%D0%A5%D0%B8%D0%BC%D0%B8%D1%8F&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook"><span> </span></span></li>
<li><cite class="citation book">Редкол.: Никольский Б.П. и др. (編). Справочник химика <b>2</b> 3-е изд., испр. Л.: Химия. 1971: 1168.</cite><span title="ctx_ver=Z39.88-2004&amp;rfr_id=info%3Asid%2Fzh.wikipedia.org%3A%E7%A2%98%E5%8C%96%E4%BA%9A%E9%93%81&amp;rft.au=%D0%A0%D0%B5%D0%B4%D0%BA%D0%BE%D0%BB.%3A+%D0%9D%D0%B8%D0%BA%D0%BE%D0%BB%D1%8C%D1%81%D0%BA%D0%B8%D0%B9+%D0%91.%D0%9F.+%D0%B8+%D0%B4%D1%80.&amp;rft.btitle=%D0%A1%D0%BF%D1%80%D0%B0%D0%B2%D0%BE%D1%87%D0%BD%D0%B8%D0%BA+%D1%85%D0%B8%D0%BC%D0%B8%D0%BA%D0%B0&amp;rft.date=1971&amp;rft.edition=3-%D0%B5+%D0%B8%D0%B7%D0%B4.%2C+%D0%B8%D1%81%D0%BF%D1%80&amp;rft.genre=book&amp;rft.pages=1168&amp;rft.place=%D0%9B.&amp;rft.pub=%D0%A5%D0%B8%D0%BC%D0%B8%D1%8F&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook"><span> </span></span></li>
<li><cite class="citation book">Рипан Р., Четяну И. Неорганическая химия. Химия металлов <b>2</b>. М.: Мир. 1972: 871.</cite><span title="ctx_ver=Z39.88-2004&amp;rfr_id=info%3Asid%2Fzh.wikipedia.org%3A%E7%A2%98%E5%8C%96%E4%BA%9A%E9%93%81&amp;rft.au=%D0%A0%D0%B8%D0%BF%D0%B0%D0%BD+%D0%A0.%2C+%D0%A7%D0%B5%D1%82%D1%8F%D0%BD%D1%83+%D0%98.&amp;rft.btitle=%D0%9D%D0%B5%D0%BE%D1%80%D0%B3%D0%B0%D0%BD%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0%D1%8F+%D1%85%D0%B8%D0%BC%D0%B8%D1%8F.+%D0%A5%D0%B8%D0%BC%D0%B8%D1%8F+%D0%BC%D0%B5%D1%82%D0%B0%D0%BB%D0%BB%D0%BE%D0%B2&amp;rft.date=1972&amp;rft.genre=book&amp;rft.pages=871&amp;rft.place=%D0%9C.&amp;rft.pub=%D0%9C%D0%B8%D1%80&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook"><span> </span></span></li></ul><!-- 
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**碘化亞鐵**是無機化合物，化學式為 FeI2。

## 製備

* 直接用碘與鐵反應：

　
: ${\mathsf {Fe+I_{2}\ {\xrightarrow {}}\ FeI_{2}}}$

* 加熱碘與硫化鐵：

　
: ${\mathsf {FeS+I_{2}\ {\xrightarrow {T}}\ FeI_{2}+S}}$

* 加熱分解 Fe (CO)4I2：

　
: ${\mathsf {Fe(CO)_{4}I_{2}\ {\xrightarrow {T}}\ FeI_{2}+2CO}}$

## 物理性質

紅棕色三方晶體，空間群_**P 3m1**_，其中 _a_ = 0,404 nm，_c_ = 0,675 nm，Z = 1。

易溶於水。

可形成 FeI2·_n_ H2O，其中 _n_ = 2, 4, 6, 9。

## 化學性質

* 在空氣中加熱時，被氧氣氧化：

　
: ${\mathsf {4FeI_{2}+3O_{2}\ {\xrightarrow {T}}\ 2Fe_{2}O_{3}+4I_{2}}}$

## 用途

在有機反應中作為催化劑使用。

## 參考文獻

* Редкол.: Кнунянц И.Л. и др. (編). Химическая энциклопедия **2**. М.: Советская энциклопедия. 1990: 671. ISBN 5-82270-035-5.
* Редкол.: Никольский Б.П. и др. (編). Справочник химика **1** 2-е изд., испр. М.-Л.: Химия. 1966: 1072.
* Редкол.: Никольский Б.П. и др. (編). Справочник химика **2** 3-е изд., испр. Л.: Химия. 1971: 1168.
* Рипан Р., Четяну И. Неорганическая химия. Химия металлов **2**. М.: Мир. 1972: 871.
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