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58问答库 > 磷原子没有3d轨道,但五氯化磷为何是sp3d杂化?六氟化硫为何是sp3d2杂化?

磷原子没有3d轨道,但五氯化磷为何是sp3d杂化?六氟化硫为何是sp3d2杂化?

2025-04-08 06:02:04

推荐回答（1个）

回答（1）：

磷怎么没有3d轨道，第三能层有3s、3p、3d轨道。形成PCl5时，P的一个3s电子跃迁到3d能级上，然后1个3s轨道、3个3p古调、1个3d轨道参与杂化形成5个sp3d轨道。

SF6的成键电子对数为6，没有孤对电子对，所以，是1个3s轨道、3个3p轨道和2个3d轨道参与杂化，因此是sp3d2杂化，空间构型为正八面体。

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