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氨气的键角为什么比PH3大
更新时间: 2020-07-10 00:00:00  

1、氨气中原子核的距离比磷化氢近,原子核间的斥力大,所以键角大。

2、NH3比PH3键角大因P电负性较N小。PH3成键电子云比NH3更偏向于H。同时P-H键长比N-H键长大。导致PH3成键电子对之间斥力减小,孤对电子对成键电子斥力使H-P-H键角更小。

关键词: 氨气 为什么 ph3

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