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What atomic or hybrid orbitals make up the sigma bond between Sb and F in antimony(III)...


What atomic or hybrid orbitals make up the sigma bond between Sb and F in antimony(III) fluoride, SbF3?

_____ orbital on Sb + _____orbital on F

What is the approximate F-Sb-F bond angle?
__________... °

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Answer #1

Sb electronic configuration is [Kr]4d105s25p3

It can undergoes sp3 hybridisation

sigma bond is formed between Sb & F in antomony (III) fluoride SbF3 is

"sp3 hybrid orbital of Sb + 2p - orbital of F".

the approximate F-Sb-F bond angle is 1070

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Answer #2

Antimony belongs to the nitrogen family; the valence electronic configuration of Sb is 5s15ps Sbis sp hybridized in SbF, molecule. Therefore, the ơ-bond in SbF, is formed by the overlap of sp hybrid orbital of Sb and 2p orbital of fluorine F 870 The electron-pair geometry of SbF is tetrahedral; however, due to one lone pair of electrons, the molecular geometry is trigonal pyramidal, like NH, (bond angle 1070) . The magnitude of lone pair-bond pair repulsion is higher compared to bond pair-bond pair repulsion; therefore, the F-Sb-F bond angle must be less than 109.5°. The factors that influence the bond angle are mentioned below: » Size of the central atom: larger the size of the central atom, smaller the bond angle This is because the electron pairs on large atom are located at greater distance (due to the large curvature of the atom), as compared to a smaller atom Electronegativity of the substituent atoms: Higher the electronegativity, smaller the bond angle If the substituent atoms have high electronegativity, the bonded pairs would lie closer to them (and far away from the central atom); as a result, the bond angle decreases. If the bonded pair of electrons were close to the central atom, bond angle would be higher due to strong repulsion. » Compare SbF with NH, to predict the bond angle The size of Sb is higher than nitrogen; also, the electronegativity of fluorine is higher than the electronegativity of hydrogen. Both these factors lead to a smaller bond angle in SbF,. The approximate bond angle of SbF, is 90°

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