<p><b>四溴化鏷</b>是無機化合物，是一種鏷鹵化物，由鏷和溴組成，具有放射性，化學式為PaBr<sub>4</sub>，是棕色晶體，可能是因為溴是棕色造成四溴化鏷的外觀為棕色晶體，其晶體結構為四方晶系。四溴化鏷在真空中昇華在400° C。結構與四溴化鏷最接近的鏷鹵化物是四氯化鏷。
</p>
<h2><span id=".E5.88.B6.E5.A4.87"></span><span id="制备">製備</span></h2>
<p>四溴化鏷可以由五溴化鏷被氫氣或鋁反應而成：</p>
<dl><dd><dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\mathsf {3PaBr_{5}+Al\ {\xrightarrow {400-450^{o}C}}\ 3PaBr_{4}+AlBr_{3}}}}">
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    <annotation encoding="application/x-tex">{\displaystyle {\mathsf {3PaBr_{5}+Al\ {\xrightarrow {400-450^{o}C}}\ 3PaBr_{4}+AlBr_{3}}}}</annotation>
  </semantics></math></span></span></dd>
<dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\mathsf {2PaBr_{5}+H_{2}\ {\xrightarrow {800^{o}C}}\ 2PaBr_{4}+2HBr}}}">
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    <annotation encoding="application/x-tex">{\displaystyle {\mathsf {2PaBr_{5}+H_{2}\ {\xrightarrow {800^{o}C}}\ 2PaBr_{4}+2HBr}}}</annotation>
  </semantics></math></span></span></dd></dl></dd></dl><h2><span id=".E5.8F.8D.E5.BA.94"></span><span id="反应">反應</span></h2>
<p>四溴化鏷和三氧化二銻反應，生成溴氧化鏷：</p>
<dl><dd><dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\mathsf {3PaBr_{4}+Sb_{2}O_{3}\ {\xrightarrow {150-200^{o}C}}\ 3PaOBr_{2}+2SbBr_{3}}}}">
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    <annotation encoding="application/x-tex">{\displaystyle {\mathsf {3PaBr_{4}+Sb_{2}O_{3}\ {\xrightarrow {150-200^{o}C}}\ 3PaOBr_{2}+2SbBr_{3}}}}</annotation>
  </semantics></math></span></span></dd></dl></dd></dl><h2><span id=".E5.8F.83.E8.80.83.E6.96.87.E7.8D.BB"></span><span id="參考文獻">參考文獻</span></h2>
**四溴化鏷**是無機化合物，是一種鏷鹵化物，由鏷和溴組成，具有放射性，化學式為 PaBr4，是棕色晶體，可能是因為溴是棕色造成四溴化鏷的外觀為棕色晶體，其晶體結構為四方晶系。四溴化鏷在真空中昇華在 400° C。結構與四溴化鏷最接近的鏷鹵化物是四氯化鏷。

## 製備

四溴化鏷可以由五溴化鏷被氫氣或鋁反應而成：

　
: : ${\mathsf {3PaBr_{5}+Al\ {\xrightarrow {400-450^{o}C}}\ 3PaBr_{4}+AlBr_{3}}}$

　
: ${\mathsf {2PaBr_{5}+H_{2}\ {\xrightarrow {800^{o}C}}\ 2PaBr_{4}+2HBr}}$

## 反應

四溴化鏷和三氧化二銻反應，生成溴氧化鏷：

　
: : ${\mathsf {3PaBr_{4}+Sb_{2}O_{3}\ {\xrightarrow {150-200^{o}C}}\ 3PaOBr_{2}+2SbBr_{3}}}$

## 參考文獻
13867-42-0