I@Dexter
INote for OP
+solved @user1 @user2...
CQuestion 1
RWhere is back bonding que?
CX-y , xeof4 wala question
MIs the answer 10?
C14
CI got 15 lone pairs , but dk how many p pi d pi bonds
M15 lp and one pπdπ bond
CHow come there's only one
ROnly oxygen bond is p pi di pi
CThere are vacant d orbitals in xe , and enough lone pairs to give
RF second period element h d orbital hota hi nhi
CWhy not the back bond between f and xe
CP toh hai par
RF ke pas already sufficient electrons h that is 8
CYeah and xe has vacant d orbitals
CSo it can share
RIt wont
C
CThis is my understanding of back bonding , lone pairs go from full filled to vacant orbitals
RBack bonding to tb krege na jab electron ki kami ho Like in BF3 isme Boron pr e kam hai islie krta h
RHa to kahi bhi back bonding thodi krwa denge
RThere are certain cases
CBoron has vacant p orbital and f has filled p so lone pairs can go forming 3 p pi p pi bonds right ?
Ryeah
COr only one
RP to P bhi kr skta h p to d bhi kr skta h
C1 or 3 ?
CBoron doesn't have d
RGeneral case bol ra hu boron ki baat nhi kr rha hu
CpH
CIf bf3 has 3 p pi p pi bonds why can xeof4 not have 5 p pi d pi bonds
RI didn’t get ur point
CHere u agreed 3 back bonds in bf3
CSo how can we calc no of back bonds in xeof4
Rits not 3 back bond 
RHar F bari bari deta hai
CWhy u said "yeah"
RI thought your 3 means 3rd p orbital
CMatlab it keeps on changing but the total number of p pi p pi bonds is 1 only
CWoh toh bf3 mein kahin nahi hai
RYup this is correct
CSame goes for xeof4?
C1 oxygen and 4 f , all 5 can give and keep on changing
CAise toh there can never be more than 1 back bond
Rbut back bonding krege kyu
RThink of a reason first
CIn xeof4 ??
5d orbital is empty , fluorine and oxygen have lone pairs so they will
5d orbital is empty , fluorine and oxygen have lone pairs so they will
Rkya Xe ke pass e ki kami hai?