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Question

# Consider the following ligands NHâˆ’2, acac (Acetylacetone), OHâˆ’, Gly, Oâˆ’2, Phen, DMG, NOâˆ’2,CO2âˆ’3,Clâˆ’,CH3COOâˆ’,en,SO2âˆ’4,Nâˆ’2. Then calculate value of "P+Qâˆ’Râˆ’S". HereP: 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 only.S: Total number of unsymmetrical bidentate ligands.

A
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B
2
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C
5
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D
6
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Solution

## The correct option is D 1P: Total number of ligands which act as bridging as well as monodentate only.Q: Total number of flexidentate ligandsR: Total number of bidentate ligands onlyS: Total number of unsymmetrical bidentate ligandsP=NH−2,O−2,OH−,Cl−=4Q=SO2−4,N−2,CO2−3,CH3COO−=4R=en,acac,Phen,DMG,Gly=5S=DMG,Gly=2P+Q−R−S=4+4−5−2=1Hence, the value of P+Q−R−S is 1.

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