二氧化硫和三氧化硫的键角

二氧化硫和三氧化硫的键角
英文回答：
The bond angle of sulfur dioxide (SO2) is approximately 119 degrees. This is due to the presence of a lone pair of electrons on the sulfur atom, which causes repulsion and reduces the bond angle from the ideal 120 degrees. The molecule has a bent shape, with the two oxygen atoms on either side of the sulfur atom.
On the other hand, the bond angle of sulfur trioxide (SO3) is approximately 120 degrees. This molecule has a trigonal planar shape, with all three oxygen atoms arranged symmetrically around the sulfur atom. The bond angle is close to the ideal 120 degrees due to the absence of a lone pair of electrons on the sulfur atom, resulting in less repulsion between the bonding pairs of electrons.
中文回答：
二氧化硫（SO2）的键角约为119度。

这是由于硫原子上存在孤对电子，导致排斥作用并减小了键角，使其略小于理想的120度。

该分子呈弯曲形状，两个氧原子位于硫原子的两侧。

另一方面，三氧化硫（SO3）的键角约为120度。

该分子呈三角平面形状，三个氧原子对称地排列在硫原子周围。

由于硫原子上没有孤对电子，使得键对电子之间的排斥作用较小，使得键角接近理想的120度。