Question

6. Consider a linear H4 molecule. (a) is the molecule centrosymmetric? What is its point group? (b) Some possible arrangements of the 4 s orbitals in the H4 molecule are shown below. Classify each as u org. Which of these arrangements have the proper symmetry to be the basis of molecular orbitals for H4? (1) 0000 (2 0000 (4) 000 (c) The linear H4 molecule should have four molecular orbitals. What are those orbitals? Rank them from low energy to high energy. Which will be filled, which empty? Should linear H4 be stable? Would it be it paramagnetic?

Answer 1

10. The linear Ho molecule is a centro- Symmetric molecule, and centre of- symmetry present at the midpoint of the nale cute Po the linear Hq mole wil have - 1 Cman's, Ca axis (perpendicular to Cool i (Points of symmetry). 1 On and coco Se point group is Dosh. b) The given arrangement of a sorbita inlinear Hamele culoare c 4 ܟܗ܂ I 2000-yu In the molecular orbitel Q: 0002 - x compre of symmetry 0000 -> . ( present then 'g' if 2000 - not then us 2000 - 6. 0000 u the tank 4 four arrangemenilie. 3,4,586) have the proper symmetry to be the basis of molecular orbital of the

c. The no picture of Hq is sholdn cellon om du 2000 out - 0000 g h - 2000 u 12 6000 og 71 en H aาชา " center H-atoms Fenergy Linear itt So in linar le molecule 4 role alar orbitaks are - Da ou do not ou. > Ranning caith mereasing energy - og < ou < og < R* filled orbitals are og and ou - As the atl electrons are paired up ath electrons so it is Diamagnetic not paramaeretic.