1.

Consider the following complexes (P) [Cr(CO)_(x)]""(Q) [Cr(CO)_(x-1)PF_(3)] If PF_(3) is better pi acceptor than CO, what will be the order of bond length of CO in complexes (P) and (Q) :

Answer»

`PgtQ`
`QgtP`
`P=Q`
can not be compared

Solution :As `PF_(3)`, is a better `pi`-acceptor than CO, so back BONDING in`pi^(*)` of CO`DARR` THUS, CO B.L. SHORTENS.


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