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11 May 2009 06:03:51 IST

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wat type of bonds are present in BF4 (-) ?? co-ordinate bonds or electrovalent bonds or covalent b

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wat type of bonds are present in BF4 (-) ?? co-ordinate bonds or electrovalent bonds or covalent bonds???

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shubham

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Joined: 25 Aug 2008

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11 May 2009 07:52:08 IST

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i think it should just be ionic bonds.. as da electronegativity diff is high.... however da book contains da answer as co-ordinate bond... plz lemme noe if i m right n correct me if wrong... :D

shubhra rai

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11 May 2009 08:07:11 IST

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its co-ordinate bond as boron as 3 co-valency and florine too has 3 and they both complete each others octet through co-ordinate bonding

NugoRama

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11 May 2009 08:13:46 IST

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edited .

Ria

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11 May 2009 14:57:24 IST

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in BF3 there are 3 covalent bands ie. three B---F bonds. In BF4(-), there is one coordinate bond (B<--F) in addition to the three B---F bonds. Flourine have lone pair of electrons so a flourine ion donates a lone pair of electrons to boron to form a coordinate bond with it.

(note that for the covalent bonds there is a flourine atom bonding with the chlorine but for the dative (coordinate) bond, a flourine ion is donating. This is because the flourine ion has already completed its octet. since it is electron rich now, so it can donate lone pair of electrons.)

KRITI JOHARI

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11 May 2009 17:44:09 IST

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bonds b/w B & F are covalent.due to lone pair of e- on F ,it bonates to B to saturate its octet -back bonding

shubham

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11 May 2009 22:17:31 IST

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oh ohk... thnx a lot.... :D

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