 Solution

ID: past-exam-of-the-chemistry-a-course-of-the-university-of-cambridge/2023/paper-1/a3/b/i/solution

R

from the axis normal to the molecular plane. Boron lies on the axis, so it contributes zero. Thus

I_{c} = 3 m_{F} R^{2} .

The boron mass does not enter this moment, rather than needing to be approximated or neglected.

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