Question

Consider the following ligands $N{H}_2^{-},acac,O{H}^{-},Gly,O_2^{-},Phen,DMG,N{O}_2^{-},C{O}_3^{2-},C{l}^{-},C{H}_{3}CO{O}^{-},en,S{O}_4^{2-}$. Then calculate value of $"P+Q-R-S"$
Here
$P:$ Total number of ligands which act as bridging as well as monodentate only.
$Q:$ Total number of flexidentate ligands
$R:$ Total number of bidentate ligands onlu
$S:$ Total number of unsymmetrical bidentate ligands.

Answer 1

$P=N{H}_2^{-},O_2^{-},O{H}^{-},C{l}^{-}=4$

$Q=S{O}_4^{2-},N{O}_2^{-},C{O}_3^{2-},C{H}_{3}CO{O}^{-}=4$

$R=en,acac,Phen,DMG,Gly=5$

$S=DMG,Gly=2$

thus,

$4+4-5-2=1$.