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Inorganic Chemistry

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27 Nov 2008 20:51:26 IST

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What is dipole moment of trigonal bipyramidal symmetery molecule .....???

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What is dipole moment of trigonal bipyramidal symmetery molecule .....???

e.g. AX5 ; where x halogen ....

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Bhaskaryya Baruah

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27 Nov 2008 22:35:29 IST

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plz give any compound....we'll try to Xplain u....actually dipole moment of a compound depends on its atoms also.....so better u mention sum examples so dat we cn xplain.....

layman

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29 Nov 2008 16:18:00 IST

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It will be zero. The two axial dipole moments cancel. On the plane the equatorial bonds are all 120 degrees apart. So they cancel.

sti I

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29 Nov 2008 19:26:50 IST

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It depends on the elements present in the compound.....

Gaurav Kakkar

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29 Nov 2008 19:41:14 IST

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It usually depends on the kind of atom or molecule attached . If 5 simple atoms (like Cl,F...etc.) are attached to the central atom then the dipole moment will be zero . But if the attached species is unsymmetrical (like OH , CN etc.) then the dipole moment will be non zero .
Hope you find this useful ...

Joshi Bhavna

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29 Nov 2008 20:11:32 IST

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it will be ZERO

Harpreet aka MAX

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29 Nov 2008 20:49:19 IST

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thanks every body

Bhaskaryya Baruah

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29 Nov 2008 22:58:44 IST

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as u hv edited ur qsn and asking for AX5.....so i wud say dat dis molecule hs zero dipole moment.....

Vinay Dahiya

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29 Nov 2008 23:35:16 IST

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well i dont know whether u know or not that PCl5 is an ionic solid even though it has a trigonal bypyramidal structure. so in all cases the diople moment is not zero. nd foor proof u can see 12th ncert.

Vinay Dahiya

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30 Nov 2008 10:03:20 IST

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hey i have read this as a fact in the 12th ncert. it ia an exception and u can see it as well that in solid form it exsits in ionic form as (PCl4)+ nd (PCl6)- but in gaseous & liquid state it is covelant hense no dipole moment due to symmmetric struture nd the same case is with the PBr5 which exists as (PBr4)+(Br)- in the solid form nd also PI5 exists as (PI4)+ nd I- in solutions.so its also the state to determine the structure of molecule.
nd u can also see it in the book"consinse inorganic chemistry" by J.D. Lee on pg no 497 topic is pentahalide. nd also in the ncert 12th 1st part p-block chap topic "phosphorus"

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