<p><b>三碘化鈦</b>是一種無機化合物，化學式為TiI<sub>3</sub>。它是暗紫色固體，難溶於有機溶劑（除非被其分解）。它可由鈦和碘反應製得：</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \mathrm {2\ Ti+3\ I_{2}\longrightarrow 2\ TiI_{3}} }">
  <semantics>
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            <mi mathvariant="normal">I</mi>
            <mrow class="MJX-TeXAtom-ORD">
              <mn>2</mn>
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          </msub>
          <mo stretchy="false">⟶<!-- ⟶ --></mo>
          <mn>2</mn>
          <mtext> </mtext>
          <mi mathvariant="normal">T</mi>
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          <msub>
            <mi mathvariant="normal">I</mi>
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    <annotation encoding="application/x-tex">{\displaystyle \mathrm {2\ Ti+3\ I_{2}\longrightarrow 2\ TiI_{3}} }</annotation>
  </semantics></math></span></span></dd></dl><p>四碘化鈦在700 °C被金屬鈦還原也能得到三碘化鈦：</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \mathrm {3\ TiI_{4}+Ti\longrightarrow 4\ TiI_{3}} }">
  <semantics>
    <mrow class="MJX-TeXAtom-ORD">
      <mstyle displaystyle="true" scriptlevel="0">
        <mrow class="MJX-TeXAtom-ORD">
          <mn>3</mn>
          <mtext> </mtext>
          <mi mathvariant="normal">T</mi>
          <mi mathvariant="normal">i</mi>
          <msub>
            <mi mathvariant="normal">I</mi>
            <mrow class="MJX-TeXAtom-ORD">
              <mn>4</mn>
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          <mo>+</mo>
          <mi mathvariant="normal">T</mi>
          <mi mathvariant="normal">i</mi>
          <mo stretchy="false">⟶<!-- ⟶ --></mo>
          <mn>4</mn>
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          <mi mathvariant="normal">T</mi>
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          <msub>
            <mi mathvariant="normal">I</mi>
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              <mn>3</mn>
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          </msub>
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    </mrow>
    <annotation encoding="application/x-tex">{\displaystyle \mathrm {3\ TiI_{4}+Ti\longrightarrow 4\ TiI_{3}} }</annotation>
  </semantics></math></span></span></dd></dl><p>它可以和二甲硫醚或四氫噻吩形成TiI<sub>3</sub>·2L配合物。</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>
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**三碘化鈦**是一種無機化合物，化學式為 TiI3。它是暗紫色固體，難溶於有機溶劑（除非被其分解）。它可由鈦和碘反應製得：

　
: $\mathrm {2\ Ti+3\ I_{2}\longrightarrow 2\ TiI_{3}} $

四碘化鈦在 700 °C 被金屬鈦還原也能得到三碘化鈦：

　
: $\mathrm {3\ TiI_{4}+Ti\longrightarrow 4\ TiI_{3}} $

它可以和二甲硫醚或四氫噻吩形成 TiI3・2L 配合物。

## 參考文獻
13783-08-9