Can somebody explain how to do these?
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If dipole moment is zero,then those compounds doesnt exists
Anonymous:
But compounds like methane too has dipole moment=0 but it does exists...
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Existence of any compound is dependent on their ability to form bonds: Ionic or covalent.
First we should know the type of elements of the compound, for example FCl3 doesn't exist but ClF3 exists. In interhalogen compounds the more electronegative element will try to pull the electrons rather than donate.
In example of BH4- , we should know that BH3 has a deficient octet and it can accept a lone pair of electrons, thus when BH3 comes in contact with H- (hydride) we get BH4-
(CCl6)2- : carbon can only form 4 bonds thus CCl6 is not possible.
NH5 is also not possible since the maximum hybridisation nitrogen can go is sp3 i.e. it can make 4 bonds, not 5. While PH5 can exist since phosphorus has d orbitals but it is not stable since the extent of overlapping of 1s orbital of hydrogen and the d orbital of Phosphorus is very less.
XeH4 doesn't exist while XeOF4 exists.
In general you should know the chemistry of individual family of compounds to actually answer whether a compound exists or not
First we should know the type of elements of the compound, for example FCl3 doesn't exist but ClF3 exists. In interhalogen compounds the more electronegative element will try to pull the electrons rather than donate.
In example of BH4- , we should know that BH3 has a deficient octet and it can accept a lone pair of electrons, thus when BH3 comes in contact with H- (hydride) we get BH4-
(CCl6)2- : carbon can only form 4 bonds thus CCl6 is not possible.
NH5 is also not possible since the maximum hybridisation nitrogen can go is sp3 i.e. it can make 4 bonds, not 5. While PH5 can exist since phosphorus has d orbitals but it is not stable since the extent of overlapping of 1s orbital of hydrogen and the d orbital of Phosphorus is very less.
XeH4 doesn't exist while XeOF4 exists.
In general you should know the chemistry of individual family of compounds to actually answer whether a compound exists or not
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