Given the following bond lengths in pm: N-N, 145; N=N, 123; Br-Br, 228 What is the best estimate of the N-Br bond length in NBr₃ in pm?

Question

Quizplus · Accepted Answer

The N-Br bond length can be estimated by adding the covalent radii of N and Br. The N-N single bond length is 145 pm, suggesting a covalent radius for N of about 72.5 pm. The Br-Br bond length is 228 pm, suggesting a covalent radius for Br of about 114 pm. Adding these gives an estimated N-Br bond length of approximately 187 pm.

Given the Following Bond Lengths in Pm: N-N, 145; N=N