Chemistry - CHEMICAL BONDING Question with Solution | TestHub
ChemistryCHEMICAL BONDINGBack bonding, Bridge bonding & odd electron moleculesEasy2 minQB
ChemistryEasysingle choice
A student compares gaseous BCl₃ and BBr₃ using the usual halogen-to-boron π-donation model. On replacing all Cl by Br, which change is expected?
Options:
Answer:
C
Solution:
The larger Br donor orbitals overlap less effectively with the compact boron 2p orbital. The usual comparison therefore gives weaker π donation and greater Lewis acidity for BBr₃. Both isolated BX₃ molecules are trigonal planar and have zero permanent dipole by symmetry.
Stream:JEESubject:ChemistryTopic:CHEMICAL BONDINGSubtopic:Back bonding, Bridge bonding & odd electron molecules
⏱ 2mℹ️ Source: QB
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