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Flag Physical Chemistry> Aieee, Help me here guys - Hybridisation...
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Okay here is my question...I know how to find the hybridisation of (say),PCl5 molecule.It has 40 valence electrons and so divided by 8 it gives sp3d hybridisation and it has a trigonal bipyramidal geometry but my question is hoq do i find the hybrisation of a particular atom like Phosphorous in Pcl5 ????Help me yaar-aieee givin me nightmares !!!God bless repliers please!!!

Geoffrey Richards , 14 Years ago
Grade 12
anser 2 Answers
Umesh Kumar

Last Activity: 14 Years ago

If the atom consists of single bond then it is sp3 hyberdised atom, if double then it is sp2, if triple then sp

vikas askiitian expert

Last Activity: 14 Years ago

dear geoffery ,   hybridisation of PCl5 is hybridisation of central atom (P) of this molecule ...

hybridisation of N in NH3 is SP3 & O in H2O is SP3 ...

 

short trick for hybridisation =>

n =[ number of electron in valence shell + number of monovalent atoms attached(like H,Cl etc) - charge on molecule]/2

for n = 2 - hybridisation is SP ,

n =3 hybridisation is SP2 ,

for n = 4 - SP3  & so on  .........

 

eg=> NH3 ..... valence electrons = 5 , monovalent atoms = 3 , charge = 0 so

                    n = [5+3-0]/2 = 4 ,  hybridisation is SP3 

 

eg=> NH4+, n = 5+4-1/2 = 4     ,   SP3

 

eq=> CO2 , n = 4/2 = 2 = SP                           (here in this molecule monovalent atoms are 0)

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