(1) According to Bent Rule Loan Pair prefer to Stay to in those atomic orbital have more (S) character.
(2) In case of P4O6 molecules atomic orbital containing loan pair have more (S) character and less (P) character hence shorter bond length while remaining orbitals have less (S) character and more (P) character hence longer bond length (X1) than (X2) in P4O10 .
(3) We know that On increasing % s character in hybrid orbital, the bond length decreases while bond angle increases.
(3) In Case of P4O6 (O-P-O) bond is Smaller due to higher P character in atomic orbital than orbital containing (O-P-O) in P4O10. (have more S character )
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