Question

"BF3,PF3 and ClF3 are AX3 type of molecules, but their structure and bond angles are different"- Explain

Answer 1

Question #84648, Chemistry / General chemistry

"BF₃, PF₃ and ClF₃ are AX₃ type of molecules, but their structure and bond angles are different"-Explain

Answer

Difference in their structure and angles come from the electronic structure of the center atom.

BF₃ is a is trigonal planar molecule as excepted for the standard AX₃ type molecule. Such geometry provides optimal minimum repulsion between the fluorine atoms.

PF₃ is a trigonal pyramid derived from the tetrahedron state, where lone pair of the phosphorous occupies top position.

ClF₃ is a T-shaped due to the chlorine having two lone pair occupying two equatorial positions of a hypothetical trigonal bipyramid.

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